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Title: Petrology, geochronology, and geophysical characterization of Mesoproterozoic rocks in central Illinois, USA

Abstract

The Precambrian basement rocks of the Eastern Granite-Rhyolite Province (EGRP) in central Illinois (midcontinent region of North America) exhibit a complex history of early volcanism, granite emplacement, and intrusion of mafic rocks. A comprehensive suite of dedicated petrographic analyses, geophysical logs, and drill core from four basement-penetrating wells, two-dimensional and three-dimensional seismic reflection data, and U-Pb age data from the Illinois Basin–Decatur Project (IBDP) and Illinois Carbon Capture Storage (ICCS) Project site provide new constraints for interpreting the Precambrian basement of the Illinois Basin. These new data reveal the basement to be compositionally and structurally complex, having typical EGRP felsic volcanic rocks intruded by the first reported gabbro in the Precambrian basement in Illinois. Zircons (n = 29) from rhyolite give a U-Pb weighted mean average age of 1467 ± 9 Ma. Zircons (n = 3) from a gabbro dike that intrudes the rhyolite yield a concordia age of 1073 ± 12 Ma, which corresponds to Grenville-age extension and represents the first Grenville-age rock in Illinois and in the EGRP. A high-resolution three-dimensional seismic reflection volume, coincident with the four wells, provides a context for interpreting the petrological data and implies a high degree of heterogeneity for basement rocks atmore » the IBDP–ICCS site, as also shown by the drill cores. The occurrence of Grenville-age gabbro is related to a prominent bowl-like structure observed on local two-dimensional seismic reflection profiles and the three-dimensional volume that is interpreted as a deep-seated mafic sill complex. Furthermore, heterogeneities such as the brecciated EGRP rhyolite and later gabbro intrusion observed in the basement lithology at the IBDP–ICCS may reflect previously unknown distal elements of the 1.1 Ga Midcontinent Rift in the EGRP and more likely Grenville-age extension.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1563061
Alternate Identifier(s):
OSTI ID: 1799717
Grant/Contract Number:  
FC26-05NT42588
Resource Type:
Published Article
Journal Name:
Geoscience Frontiers
Additional Journal Information:
Journal Name: Geoscience Frontiers Journal Volume: 11 Journal Issue: 2; Journal ID: ISSN 1674-9871
Publisher:
Elsevier
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
58 GEOSCIENCES; Geology; Eastern granite-rhyolite province; Mesoproterozoic; Carbon storage; Reflection seismology; Zircon U-Pb geochronology; Illinois

Citation Formats

Freiburg, Jared T., McBride, John H., Malone, David H., and Leetaru, Hannes E.. Petrology, geochronology, and geophysical characterization of Mesoproterozoic rocks in central Illinois, USA. Country unknown/Code not available: N. p., 2020. Web. https://doi.org/10.1016/j.gsf.2019.07.004.
Freiburg, Jared T., McBride, John H., Malone, David H., & Leetaru, Hannes E.. Petrology, geochronology, and geophysical characterization of Mesoproterozoic rocks in central Illinois, USA. Country unknown/Code not available. https://doi.org/10.1016/j.gsf.2019.07.004
Freiburg, Jared T., McBride, John H., Malone, David H., and Leetaru, Hannes E.. Sun . "Petrology, geochronology, and geophysical characterization of Mesoproterozoic rocks in central Illinois, USA". Country unknown/Code not available. https://doi.org/10.1016/j.gsf.2019.07.004.
@article{osti_1563061,
title = {Petrology, geochronology, and geophysical characterization of Mesoproterozoic rocks in central Illinois, USA},
author = {Freiburg, Jared T. and McBride, John H. and Malone, David H. and Leetaru, Hannes E.},
abstractNote = {The Precambrian basement rocks of the Eastern Granite-Rhyolite Province (EGRP) in central Illinois (midcontinent region of North America) exhibit a complex history of early volcanism, granite emplacement, and intrusion of mafic rocks. A comprehensive suite of dedicated petrographic analyses, geophysical logs, and drill core from four basement-penetrating wells, two-dimensional and three-dimensional seismic reflection data, and U-Pb age data from the Illinois Basin–Decatur Project (IBDP) and Illinois Carbon Capture Storage (ICCS) Project site provide new constraints for interpreting the Precambrian basement of the Illinois Basin. These new data reveal the basement to be compositionally and structurally complex, having typical EGRP felsic volcanic rocks intruded by the first reported gabbro in the Precambrian basement in Illinois. Zircons (n = 29) from rhyolite give a U-Pb weighted mean average age of 1467 ± 9 Ma. Zircons (n = 3) from a gabbro dike that intrudes the rhyolite yield a concordia age of 1073 ± 12 Ma, which corresponds to Grenville-age extension and represents the first Grenville-age rock in Illinois and in the EGRP. A high-resolution three-dimensional seismic reflection volume, coincident with the four wells, provides a context for interpreting the petrological data and implies a high degree of heterogeneity for basement rocks at the IBDP–ICCS site, as also shown by the drill cores. The occurrence of Grenville-age gabbro is related to a prominent bowl-like structure observed on local two-dimensional seismic reflection profiles and the three-dimensional volume that is interpreted as a deep-seated mafic sill complex. Furthermore, heterogeneities such as the brecciated EGRP rhyolite and later gabbro intrusion observed in the basement lithology at the IBDP–ICCS may reflect previously unknown distal elements of the 1.1 Ga Midcontinent Rift in the EGRP and more likely Grenville-age extension.},
doi = {10.1016/j.gsf.2019.07.004},
journal = {Geoscience Frontiers},
number = 2,
volume = 11,
place = {Country unknown/Code not available},
year = {2020},
month = {3}
}

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Works referenced in this record:

Magmatic activity and plate motion during the latent stage of Midcontinent Rift development
journal, April 2014

  • Swanson-Hysell, N. L.; Burgess, S. D.; Maloof, A. C.
  • Geology, Vol. 42, Issue 6
  • DOI: 10.1130/G35271.1

<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2007-01-01">January 2007</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Whitmeyer, Steven</span> </li> <li> Geosphere, Vol. 3, Issue 4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/GES00055.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/GES00055.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0016-7606(1985)96<1572:UAFTNP>2.0.CO;2" target="_blank" rel="noopener noreferrer" class="name">U-Pb ages from the Nipigon plate and northern Lake Superior<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1985-01-01">January 1985</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Davis, D. W.; Sutcliffe, R. H.</span> </li> <li> Geological Society of America Bulletin, Vol. 96, Issue 12</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0016-7606(1985)96<1572:UAFTNP>2.0.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0016-7606(1985)96<1572:UAFTNP>2.0.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1029/JZ071i022p05427" target="_blank" rel="noopener noreferrer" class="name">Geochronology of the midcontinent region, United States: 4. Eastern area<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1966-11-15">November 1966</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Lidiak, Edward G.; Marvin, Richard F.; Tnomas, Herman H.</span> </li> <li> Journal of Geophysical Research, Vol. 71, Issue 22</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1029/JZ071i022p05427" class="text-muted" target="_blank" rel="noopener noreferrer">10.1029/JZ071i022p05427<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1986)14<492:PHOTMR>2.0.CO;2" target="_blank" rel="noopener noreferrer" class="name">Proterozoic history of the midcontinent region of North America<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1986-01-01">January 1986</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Bickford, M. E.; Van, W. R.; Zietz, Isidore</span> </li> <li> Geology, Vol. 14, Issue 6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1986)14<492:PHOTMR>2.0.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1986)14<492:PHOTMR>2.0.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.precamres.2014.11.024" target="_blank" rel="noopener noreferrer" class="name">Mesoproterozoic-trans-Laurentian magmatism: A synthesis of continent-wide age distributions, new SIMS U–Pb ages, zircon saturation temperatures, and Hf and Nd isotopic compositions<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2015-08-01">August 2015</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Bickford, M. E.; Van Schmus, W. R.; Karlstrom, K. E.</span> </li> <li> Precambrian Research, Vol. 265</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.precamres.2014.11.024" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.precamres.2014.11.024<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.gsf.2017.01.006" target="_blank" rel="noopener noreferrer" class="name">Calcite twinning strain variations across the Proterozoic Grenville orogen and Keweenaw-Kapuskasing inverted foreland, USA and Canada<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2017-11-01">November 2017</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Craddock, John P.; Craddock, Suzanne D.; Konstantinou, Alex</span> </li> <li> Geoscience Frontiers, Vol. 8, Issue 6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.gsf.2017.01.006" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.gsf.2017.01.006<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1996)024<0151:MUSFAF>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Midcontinent U.S. fault and fold zones: A legacy of Proterozoic intracratonic extensional tectonism?<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1996-01-01">January 1996</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Marshak, Stephen; Paulsen, Timothy</span> </li> <li> Geology, Vol. 24, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1996)024<0151:MUSFAF>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1996)024<0151:MUSFAF>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1990)018<1203:GSAROP>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Growth, stabilization, and reactivation of Proterozoic lithosphere in the southwestern United States<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1990-01-01">January 1990</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Bowring, Samuel A.; Karlstrom, Karl E.</span> </li> <li> Geology, Vol. 18, Issue 12</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1990)018<1203:GSAROP>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1990)018<1203:GSAROP>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.2113/34.2.245" target="_blank" rel="noopener noreferrer" class="name">Isotopic and elemental chemistry of subsurface Precambrian igneous rocks, west Texas and eastern New Mexico<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1999-11-01">November 1999</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Barnes, M. A.</span> </li> <li> Rocky Mountain Geology, Vol. 34, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.2113/34.2.245" class="text-muted" target="_blank" rel="noopener noreferrer">10.2113/34.2.245<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0016-7606(1999)111<0375:UCBTCI>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Upper crust beneath the central Illinois basin, United States<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1999-03-01">March 1999</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> McBride, John H.; Kolata, Dennis R.</span> </li> <li> Geological Society of America Bulletin, Vol. 111, Issue 3</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0016-7606(1999)111<0375:UCBTCI>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0016-7606(1999)111<0375:UCBTCI>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1002/2013GL059176" target="_blank" rel="noopener noreferrer" class="name">Was the Midcontinent Rift part of a successful seafloor-spreading episode?<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2014-03-05">March 2014</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Stein, Carol A.; Stein, Seth; Merino, Miguel</span> </li> <li> Geophysical Research Letters, Vol. 41, Issue 5</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1002/2013GL059176" class="text-muted" target="_blank" rel="noopener noreferrer">10.1002/2013GL059176<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.precamres.2007.02.018" target="_blank" rel="noopener noreferrer" class="name">U–Pb geochronology of the Wolf River batholith, north-central Wisconsin: Evidence for successive magmatism between 1484Ma and 1468Ma<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2007-08-01">August 2007</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Dewane, T. J.; Van Schmus, W. R.</span> </li> <li> Precambrian Research, Vol. 157, Issue 1-4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.precamres.2007.02.018" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.precamres.2007.02.018<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1029/2007GC001805" target="_blank" rel="noopener noreferrer" class="name">Enhanced precision, accuracy, efficiency, and spatial resolution of U-Pb ages by laser ablation-multicollector-inductively coupled plasma-mass spectrometry: TECHNICAL BRIEF<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2008-03-01">March 2008</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Gehrels, George E.; Valencia, Victor A.; Ruiz, Joaquin</span> </li> <li> Geochemistry, Geophysics, Geosystems, Vol. 9, Issue 3</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1029/2007GC001805" class="text-muted" target="_blank" rel="noopener noreferrer">10.1029/2007GC001805<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.earscirev.2017.04.002" target="_blank" rel="noopener noreferrer" class="name">Paleozoic reactivation structures in the Appalachian-Ouachita-Marathon foreland: Far-field deformation across Pangea<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2017-06-01">June 2017</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Craddock, John P.; Malone, David H.; Porter, Ryan</span> </li> <li> Earth-Science Reviews, Vol. 169</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.earscirev.2017.04.002" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.earscirev.2017.04.002<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1029/JB088iB09p07276" target="_blank" rel="noopener noreferrer" class="name">Age and significance of Precambrian Basement Samples from northern Illinois and adjacent states<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1983-09-10">September 1983</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Hoppe, W. J.; Montgomery, C. W.; Van Schmus, W. R.</span> </li> <li> Journal of Geophysical Research: Solid Earth, Vol. 88, Issue B9</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1029/JB088iB09p07276" class="text-muted" target="_blank" rel="noopener noreferrer">10.1029/JB088iB09p07276<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1029/95JB02955" target="_blank" rel="noopener noreferrer" class="name">Extensional processes in continental lithosphere<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1995-12-10">December 1995</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Ruppel, Carolyn</span> </li> <li> Journal of Geophysical Research: Solid Earth, Vol. 100, Issue B12</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1029/95JB02955" class="text-muted" target="_blank" rel="noopener noreferrer">10.1029/95JB02955<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/GES01183.1" target="_blank" rel="noopener noreferrer" class="name">North America’s Midcontinent Rift: When rift met LIP<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2015-08-13">August 2015</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Stein, Carol A.; Kley, Jonas; Stein, Seth</span> </li> <li> Geosphere, Vol. 11, Issue 5</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/GES01183.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/GES01183.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/S0301-9268(97)00038-7" target="_blank" rel="noopener noreferrer" class="name">Lithotectonic elements of the Grenville Province: review and tectonic implications<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1997-12-01">December 1997</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Rivers, Toby</span> </li> <li> Precambrian Research, Vol. 86, Issue 3-4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/S0301-9268(97)00038-7" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/S0301-9268(97)00038-7<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0016-7606(1998)110<1357:TEOTSL>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Tectonic evolution of the southern Laurentian Grenville orogenic belt<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1998-11-01">November 1998</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Mosher, Sharon</span> </li> <li> Geological Society of America Bulletin, Vol. 110, Issue 11</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0016-7606(1998)110<1357:TEOTSL>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0016-7606(1998)110<1357:TEOTSL>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.precamres.2006.04.006" target="_blank" rel="noopener noreferrer" class="name">Deep seismic reflectivity beneath an intracratonic basin: Insights into the behavior of the uppermost mantle beneath the Illinois basin<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2006-09-01">September 2006</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Okure, Maxwell S.; McBride, John H.</span> </li> <li> Precambrian Research, Vol. 149, Issue 3-4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.precamres.2006.04.006" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.precamres.2006.04.006<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1989)017<0505:MPBFOT>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Major Proterozoic basement features of the eastern midcontinent of North America revealed by recent COCORP profiling<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1989-01-01">January 1989</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Pratt, T.; Culotta, R.; Hauser, E.</span> </li> <li> Geology, Vol. 17, Issue 6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1989)017<0505:MPBFOT>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1989)017<0505:MPBFOT>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1190/tle32101268.1" target="_blank" rel="noopener noreferrer" class="name">Monitoring CO <sub>2</sub> injection for carbon capture and storage using time-lapse 3D VSPs<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2013-10-01">October 2013</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Couëslan, M. L.; Ali, S.; Campbell, A.</span> </li> <li> The Leading Edge, Vol. 32, Issue 10</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1190/tle32101268.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1190/tle32101268.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1992)020<0137:SNEFAM>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Sm/Nd evidence for a major 1.5 Ga crust-forming event in the central Grenville province<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1992-01-01">January 1992</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Dickin, A. P.; Higgins, M. D.</span> </li> <li> Geology, Vol. 20, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1992)020<0137:SNEFAM>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1992)020<0137:SNEFAM>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0040-1951(83)90026-4" target="_blank" rel="noopener noreferrer" class="name">The role of rifting in the tectonic development of the midcontinent, U.S.A.<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1983-05-01">May 1983</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Keller, G. R.; Lidiak, E. G.; Hinze, W. J.</span> </li> <li> Tectonophysics, Vol. 94, Issue 1-4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/0040-1951(83)90026-4" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/0040-1951(83)90026-4<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1994)022<0827:DOPMCI>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Distribution of pre-1400 Ma crust in the Grenville province: Implications for rifting in Laurentia-Baltica during geon 14<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1994-01-01">January 1994</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Gower, Charles F.; Tucker, Robert D.</span> </li> <li> Geology, Vol. 22, Issue 9</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1994)022<0827:DOPMCI>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1994)022<0827:DOPMCI>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1991)019<0598:PMOLAE>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Pacific margins of Laurentia and East Antarctica-Australia as a conjugate rift pair: Evidence and implications for an Eocambrian supercontinent<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1991-01-01">January 1991</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Dalziel, Ian W. D.</span> </li> <li> Geology, Vol. 19, Issue 6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1991)019<0598:PMOLAE>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1991)019<0598:PMOLAE>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.oregeorev.2013.02.007" target="_blank" rel="noopener noreferrer" class="name">The pilot knob magnetite deposit in the Proterozoic St. Francois Mountains Terrane, southeast Missouri, USA: A magmatic and hydrothermal replacement iron deposit<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2013-09-01">September 2013</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Nold, John L.; Davidson, Paul; Dudley, Mark A.</span> </li> <li> Ore Geology Reviews, Vol. 53</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.oregeorev.2013.02.007" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.oregeorev.2013.02.007<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1146/annurev.ea.13.050185.002021" target="_blank" rel="noopener noreferrer" class="name">The Midcontinent Rift System<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1985-05-01">May 1985</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Van Schmus, W. R.; Hinze, W. J.</span> </li> <li> Annual Review of Earth and Planetary Sciences, Vol. 13, Issue 1</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1146/annurev.ea.13.050185.002021" class="text-muted" target="_blank" rel="noopener noreferrer">10.1146/annurev.ea.13.050185.002021<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/GES01302.1" target="_blank" rel="noopener noreferrer" class="name">Maximum depositional age of the Neoproterozoic Jacobsville Sandstone, Michigan: Implications for the evolution of the Midcontinent Rift<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2016-07-12">July 2016</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Malone, David H.; Stein, Carol A.; Craddock, John P.</span> </li> <li> Geosphere, Vol. 12, Issue 4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/GES01302.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/GES01302.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/S0040-1951(02)00653-4" target="_blank" rel="noopener noreferrer" class="name">Geophysical constraints on understanding the origin of the Illinois basin and its underlying crust<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2003-02-01">February 2003</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> McBride, John H.; Kolata, Dennis R.; Hildenbrand, Thomas G.</span> </li> <li> Tectonophysics, Vol. 363, Issue 1-2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/S0040-1951(02)00653-4" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/S0040-1951(02)00653-4<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1190/1.1444415" target="_blank" rel="noopener noreferrer" class="name">3-D seismic attributes using a semblance‐based coherency algorithm<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1998-07-01">July 1998</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Marfurt, Kurt J.; Kirlin, R. Lynn; Farmer, Steven L.</span> </li> <li> GEOPHYSICS, Vol. 63, Issue 4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1190/1.1444415" class="text-muted" target="_blank" rel="noopener noreferrer">10.1190/1.1444415<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(2001)029<1015:PROCCA>2.0.CO;2" target="_blank" rel="noopener noreferrer" class="name">Paleoproterozoic rocks of central Colorado: Accreted arcs or extended older crust?<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2001-01-01">January 2001</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Hill, Barbara M.; Bickford, M. E.</span> </li> <li> Geology, Vol. 29, Issue 11</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(2001)029<1015:PROCCA>2.0.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(2001)029<1015:PROCCA>2.0.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.2113/33.2.161" target="_blank" rel="noopener noreferrer" class="name">Persistent influence of Proterozoic accretionary boundaries in the tectonic evolution of southwestern North America: Interaction of cratonic grain and mantle modification events<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1998-10-01">October 1998</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Karlstrom, K. E.; Humphreys, E. D.</span> </li> <li> Rocky Mountain Geology, Vol. 33, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.2113/33.2.161" class="text-muted" target="_blank" rel="noopener noreferrer">10.2113/33.2.161<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/GES01286.1" target="_blank" rel="noopener noreferrer" class="name">Fine-scale structure of the Precambrian beneath the Illinois Basin<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2016-03-09">March 2016</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> McBride, John H.; Leetaru, Hannes E.; Keach, R. William</span> </li> <li> Geosphere, Vol. 12, Issue 2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/GES01286.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/GES01286.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/B31944.1" target="_blank" rel="noopener noreferrer" class="name">Failed rifting and fast drifting: Midcontinent Rift development, Laurentia’s rapid motion and the driver of Grenvillian orogenesis<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2019-01-29">January 2019</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Swanson-Hysell, Nicholas L.; Ramezani, Jahandar; Fairchild, Luke M.</span> </li> <li> GSA Bulletin, Vol. 131, Issue 5-6</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/B31944.1" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/B31944.1<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0012-821X(90)90098-I" target="_blank" rel="noopener noreferrer" class="name">Time resolution of geologic events on the Keweenaw Peninsula and implications for development of the Midcontinent Rift system<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1990-02-01">February 1990</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Davis, D. W.; Paces, J. B.</span> </li> <li> Earth and Planetary Science Letters, Vol. 97, Issue 1-2</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/0012-821X(90)90098-I" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/0012-821X(90)90098-I<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1002/2017JB014150" target="_blank" rel="noopener noreferrer" class="name">Detailed crustal thickness variations beneath the Illinois Basin area: Implications for crustal evolution of the midcontinent: Crustal Thickness Beneath Illinois Basin<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2017-08-01">August 2017</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Yang, Xiaotao; Pavlis, Gary L.; Hamburger, Michael W.</span> </li> <li> Journal of Geophysical Research: Solid Earth, Vol. 122, Issue 8</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1002/2017JB014150" class="text-muted" target="_blank" rel="noopener noreferrer">10.1002/2017JB014150<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1029/93JB01159" target="_blank" rel="noopener noreferrer" class="name">Precise U-Pb ages of Duluth Complex and related mafic intrusions, northeastern Minnesota: Geochronological insights to physical, petrogenetic, paleomagnetic, and tectonomagmatic processes associated with the 1.1 Ga Midcontinent Rift System<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1993-08-10">August 1993</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Paces, James B.; Miller, James D.</span> </li> <li> Journal of Geophysical Research: Solid Earth, Vol. 98, Issue B8</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1029/93JB01159" class="text-muted" target="_blank" rel="noopener noreferrer">10.1029/93JB01159<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0016-7606(1975)86<907:GAAOTW>2.0.CO;2" target="_blank" rel="noopener noreferrer" class="name">Geology and Age of the Wolf River Batholith, Wisconsin<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1975-01-01">January 1975</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Van Schmus, W. R.; Medaris, L. G.; Banks, P. O.</span> </li> <li> Geological Society of America Bulletin, Vol. 86, Issue 7</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0016-7606(1975)86<907:GAAOTW>2.0.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0016-7606(1975)86<907:GAAOTW>2.0.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1130/0091-7613(1991)019<0425:SUSEAS>2.3.CO;2" target="_blank" rel="noopener noreferrer" class="name">Southwest U.S.-East Antarctic (SWEAT) connection: A hypothesis<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1991-01-01">January 1991</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Moores, E. M.</span> </li> <li> Geology, Vol. 19, Issue 5</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1130/0091-7613(1991)019<0425:SUSEAS>2.3.CO;2" class="text-muted" target="_blank" rel="noopener noreferrer">10.1130/0091-7613(1991)019<0425:SUSEAS>2.3.CO;2<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/j.ijggc.2015.12.015" target="_blank" rel="noopener noreferrer" class="name">Overview of microseismic response to CO2 injection into the Mt. Simon saline reservoir at the Illinois Basin-Decatur Project<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2016-11-01">November 2016</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Bauer, Robert A.; Carney, Michael; Finley, Robert J.</span> </li> <li> International Journal of Greenhouse Gas Control, Vol. 54</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/j.ijggc.2015.12.015" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/j.ijggc.2015.12.015<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="journal"><span class="fa fa-angle-right"></span> journal<small class="text-muted"> (42)</small></a></li> </ul> <div style="margin-top:2em;"> <form class="pure-form small text-muted reference-search"> <label for="reference-search-text" class="sr-only">Search</label> <input class="search form-control pure-input-1" id="reference-search-text" placeholder="Search" style="margin-bottom:10px;" /> <fieldset> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="name" style="position:relative;top:2px;" id="reference-search-sort-name"><label for="reference-search-sort-name" style="margin-left: .3em;">Sort by title</label></div> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="date" data-order="desc" style="position:relative;top:2px;" id="reference-search-sort-date"><label for="reference-search-sort-date" style="margin-left: .3em;">Sort by date</label></div> </fieldset> <div class="text-left" style="margin-left:1em;"> <a href="" class="filter-clear clearfix" title="Clear filter / sort" style="font-weight:normal; float:none;">[ × clear filter / sort ]</a> </div> </form> </div> </div> </div> </section> <section id="biblio-related" class="tab-content tab-content-sec " data-tab="biblio"> <div class="row"> <div class="col-sm-9 order-sm-9"> <section id="biblio-similar" class="tab-content tab-content-sec active" data-tab="related"> <div class="padding"> <p class="lead text-muted" style="font-size: 18px; margin-top:0px;">Similar Records in DOE PAGES and OSTI.GOV collections:</p> <aside> <ul class="item-list" itemscope itemtype="http://schema.org/ItemList" style="padding-left:0; list-style-type: none;"> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="1" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/6003847-middle-late-proterozoic-tectonics-west-texas-eastern-new-mexico-geophysical-interpretation" itemprop="url">Middle-late Proterozoic tectonics of west Texas and eastern New Mexico: A geophysical interpretation</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Adams, D C</span> ; <span class="author">Keller, G R</span> <span class="text-muted pubdata"> - Geological Society of America, Abstracts with Programs; (United States)</span> </span> </div> <div class="abstract">The Midcontinent rift system forms one of the most prominent gravity features in North America. The geophysical anomaly extends in an arc from Oklahoma to Lake Superior and then into Kentucky. The Midcontinent Rift System was active between 1.19--1.01 Ga as indicated in the Lake Superior region by age dating of intrusive igneous rocks. The authors suggest that the period of formation of the Midcontinent rift was a time of extensive igneous activity in Texas and New Mexico which is represented by intrusions beneath the Central Basin Platform (TX-NM), Pajarito Mountain in the Sacramento Mountains (NM), the Mundy Breccia in<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> the Franklin Mountains (TX), lava flows in the Allamore Formation near Van Horn (TX), and the Crosbyton geophysical anomaly (east of Lubbock, TX). These bodies were intruded between 1.07--1.22 Ga. These bodies and other bodies located by geophysical anomalies and wells drilled into mafic Precambrian rocks may be related to the Midcontinent rift system by a rift jump or splay. Alteratively this magmatism could be related to Grenville age tectonics in Texas. The Central Basin Platform, is divided in two on gravity maps by the Abilene minimum, an ENE trending 900 km long 100 km wide gravity low. This gravity low is not associated with basement topography and must be an intra-basement feature. One possible source of this body is a continental arc batholith. This batholith must have been intruded near a suture zone prior to 1166 Ma the age of the Central Basin Platform intrusion. A possible age for this intrusive would be 1,350--1,400 Ma. This age would coincide with formation of the Chaves Granite Gneiss terrain and the Red River-Tillman metamorphic belt, a possible foreland basin. This date would also coincide with regional metamorphism in north-central New Mexico.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="2" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/5739399-layered-rocks-beneath-phanerozoic-platform-us-midcontinent" itemprop="url">Layered rocks beneath the Phanerozoic platform of the US midcontinent</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Hauser, E C</span> <span class="text-muted pubdata"> - AAPG Bulletin (American Association of Petroleum Geologists); (United States)</span> </span> </div> <div class="abstract">A thick sequence of layered rocks lies hidden beneath the Phanerozoic cover of the central US over large regions. A thick sequence of Precambrian layered rocks in imaged on the COCORP transect across southern Illinois and Indiana. The thickness of this layered sequence varies from 1-3 times the thickness of the overlying Phanerozoic section of the Illinois basin. The layered sequence is observed for close to 200 km in an east-west direction. Similar layered reflections are seen on the COCORP data from Hardeman Co., TX, and neighboring southwest Oklahoma. Both of these known occurrences lie within the region of the<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> middle Proterozoic Granite/Rhyolite province of the US midcontinent, an area within which scattered wells to basement commonly encounter 1.3-1.5 Ga undeformed granite and/or compositionally similar rhyolite. Therefore, these layered assemblages may comprise a thick sequence of silicic volcanic and sedimentary rocks (perhaps also injected by mafic sills) between scattered volcanic-intrusive centers, such as exposed in the St. Francois Mountains of southeast Missouri. However, in places such as Illinois and Indiana, the near absence of deep wells leaves the possibility that the upper portion of these layered rocks may locally be of late Proterozoic or earliest Paleozoic age. The reprocessing of available industry data, analyzed in conjunction with the existing COCORP data, includes extended vibroseis correlation. These industry data are invaluable in the author's effort to expand the known distribution of these layered rocks (e.g., into north-central Illinois) and to map their structures.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="3" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/7123436-midcontinent-rift-system-precambrian-basement-southern-michigan" itemprop="url">The Midcontinent rift system and the Precambrian basement in southern Michigan</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Smith, W A</span> <span class="text-muted pubdata"> - Geological Society of America, Abstracts with Programs; (United States)</span> </span> </div> <div class="abstract">The Precambrian basement within Michigan consists of at least three provinces, each characterized by distinctive potential field anomalies: (1) the Eastern Granite-Rhyolite Province (EGRP) in the south, (2) the Grenville Province in the southeast and (3) the Penokean Province to the north. Also located within the basement is the Mid-Michigan rift (MMR), which is the eastern arm of the Midcontinent rift system (MRS). Southwest and parallel to the MMR is a series of linear positive gravity anomalies which has been referred to as the Ft. Wayne rift (FWR) and the Southwest Michigan Anomaly (SWMA). The EGRP, which is characterized by<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> undeformed and unmetamorphosed rhyolite to dacite and epizonal granites, was emplaced ca. 1510--1450 Ma. However, the EGRP may be comprised of several terranes of varying extent and origin based on analysis of potential field data and rock and mineral ages. The MMR and the FWR/SWMA are characterized by linear arrays of positive magnetic and gravity anomalies, which are probably due to thick accumulations of mafic igneous rocks within the rifts. The extent and trends of the FWR/SWMA have been largely inferred from geophysical data with a presumption of the age of about 1,100 Ma. The continuation of the MMR southward into Ohio and Kentucky as a sequence of gravity highs is questionable and needs further resolution. The FWR/SWMA may be part of the East Continent Rift Basin (ECRB). The ECRB, which is a large complex of related rift basins of Keweenawan age (1300 --1100 Ma), may be an extension of the MRS but it is not physically continuous with it. The ECRB lies to the west of the Grenville Front and extends at least from northwest Ohio to central Kentucky. Extensions of the ECRB north and south are speculative.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="4" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/5951365-new-late-precambrian-cambrian-pb-zircon-ages-zoned-intrusives-western-carolina-terrane-spartanburg-union-counties-south-carolina" itemprop="url">New late Precambrian-Cambrian U-PB zircon ages for zoned intrusives in the western Carolina terrane, Spartanburg and Union Counties, South Carolina</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Dennis, A J</span> ; <span class="author">Wright, J E</span> <span class="text-muted pubdata"> - Geological Society of America, Abstracts with Programs; (United States)</span> </span> </div> <div class="abstract">The geology of the western Carolina terrane comprises zoned mafic-ultramafic intrusive complexes intruding a volcanic pile of basalts and basaltic andesites; this package is interpreted to represent an episode of intra-arc rifting prior to regional metamorphism and foliation formation. New U-Pb zircon ages from the Mean Crossroads complex in northwestern South Carolina along the central Piedmont suture confirm relative ages obtained by detailed mapping. Two foliated meta-diorites yield U-Pb dates of 580 Ma, interpreted to be crystallization ages. A foliated meta-quartz diorite yields a U-Pb date of 535 Ma interpreted to be a crystallization age. These ages are broadly contemporary<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> with those inferred by other workers for the Battleground Formation in the type locality of the Kings Mountain belt. An undeformed, unmetamorphosed diorite intruding these metamorphosed zoned complex intrusives also yields an age of 535 Ma. Hence the authors believe that intra-arc rifting and regional metamorphism both occurred c. 535 Ma. While petrographic and Ar-Ar studies support subsequent regional metamorphic overprint(s), or at least static recrystallization and/or uplift through hornblende-biotite-muscovite blocking temperatures for Ar in mid- to late-Paleozoic time, the 535 Ma, undeformed, unmetamorphosed intrusive suggest late Precambrian regional metamorphism and deformation was the event responsible for regional greenschist-lower amphibolite facies metamorphism and foliation formation in this area of the Piedmont. This seems to contradict correlations with middle Ordovician fabric elements in the eastern Piedmont as well as the idea that this metamorphism and fabric development are related to presumed early Paleozoic accretion of the Carolina arc to Laurentia. They have also dated a foliated megacrystic granite that cuts the central Piedmont suture (325 Ma, U-Pb zircon), and the Bald Rock granite (326 Ma, U-Pb zircon).</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="5" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/6899559-middle-proterozoic-tectonic-activity-west-texas-eastern-new-mexico-analysis-gravity-magnetic-anomalies" itemprop="url">Middle proterozoic tectonic activity in west Texas and eastern New Mexico and analysis of gravity and magnetic anomalies</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Adams, D C</span> ; <span class="author">Keller, G R</span> <span class="text-muted pubdata"> - AAPG Bulletin (American Association of Petroleum Geologists); (United States)</span> </span> </div> <div class="abstract">The Precambrian history of west Texas and eastern New Mexico is complex, consisting of four events: Early Proterozoic orogenic activity (16309-1800 Ma), formation of the western granite-rhyolite province (WGRP) (1340-1410 Ma), Grenville age tectonics (1116-1232 Ma), and middle Proterozoic extension possibly related to mid-continent rifting (1086-1109 Ma). Pre-Grenville tectonics, Grenville tectonics, and mid-continent rifting are represented in this area by the Abilene gravity minimum (AGM) and bimodal igneous rocks, which are probably younger. We have used gravity modeling and the comparison of gravity and magnetic anomalies with rock types reported from wells penetrating Precambrian basement to study the AGM and<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> middle Proterozoic extension in this area. The AGM is an east-northeast-trending, 600 km long, gravity low, which extends from the Texas-Oklahoma border through the central basin platform (CBP) to the Delaware basin. This feature appears to predate formation of the mafic body in the CBP (1163 Ma) and is most likely related to Pre-Grenville tectonics, possibly representing a continental margin arc batholith. Evidence of middle Proterozoic extension is found in the form of igneous bodies in the CBP, the Van Horn uplift, the Franklin Mountains, and the Sacramento Mountains. Analysis of gravity and magnetic anomalies shows that paired gravity and magnetic highs are related to mafic intrusions in the upper crust. Mapping of middle Proterozoic igneous rocks and the paired anomalies outlines a 530 km diameter area of distributed east-west-oriented extension. The Debaca-Swisher terrain of shallow marine and clastic sedimentary rocks is age correlative with middle Proterozoic extension. These rocks may represent the lithology of possible Proterozoic exploration targets. Proterozoic structures were reactivated during the Paleozoic, affecting both the structure and deposition in the Permian basin.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> </div> </div> </div> <div class="clearfix"></div> </div> </li> </ul> </aside> </div> </section> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a class="tab-nav disabled" data-tab="related" style="color: #636c72 !important; opacity: 1;"><span class="fa fa-angle-right"></span> Similar Records</a></li> </ul> </div> </div> </section> </div></div> </div> </div> </section> <footer class="" style="background-color:#f9f9f9; /* padding-top: 0.5rem; */"> <div class="footer-minor"> <div class="container"> <hr class="footer-separator" /> <div class="text-center" style="margin-top:1.25rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list" id="footer-org-menu"> <li class="pure-menu-item"> <a href="https://energy.gov" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-us-doe-min" alt="U.S. Department of Energy" /> </a> </li> <li class="pure-menu-item"> <a href="https://www.energy.gov/science/office-science" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-office-of-science-min" alt="Office of Science" /> </a> </li> <li class="pure-menu-item"> <a href="/"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-osti-min" alt="Office of Scientific and Technical Information" /> </a> </li> </ul> </div> </div> <div class="text-center small" style="margin-top:0.5em;margin-bottom:2.0rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list"> <li class="pure-menu-item"><a href="/disclaim" class="pure-menu-link"><span class="fa fa-institution"></span> Website Policies <span class="hidden-xs">/ Important Links</span></a></li> <li class="pure-menu-item"><a href="/pages/contact" class="pure-menu-link"><span class="fa fa-comments-o"></span> Contact Us</a></li> <li class="d-block d-md-none"></li> <li class="pure-menu-item"><a href="https://www.facebook.com/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-facebook" style=""></span></a></li> <li class="pure-menu-item"><a href="https://twitter.com/OSTIgov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-twitter" style=""></span></a></li> <li class="pure-menu-item"><a href="https://www.youtube.com/user/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-youtube-play" style=""></span></a></li> </ul> </div> </div> </div> </div> </footer> <link href="/pages/css/pages.fonts.210604.1157.css" rel="stylesheet"> <script src="/pages/js/pages.210604.1157.js"></script><noscript></noscript> <script defer src="/pages/js/pages.biblio.210604.1157.js"></script><noscript></noscript> <script defer src="/pages/js/lity.js"></script><noscript></noscript> <script async type="text/javascript" src="/pages/js/Universal-Federated-Analytics-Min.js?agency=DOE" id="_fed_an_ua_tag"></script><noscript></noscript> </body> <!-- DOE PAGES v.210604.1157 --> </html>