Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges

DePaolo, D J

doi:10.1126/science.209.4457.684

Title: Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges

Full Record
Other Related Research

Abstract

Granitic rocks from batholiths of the Sierra Nevada and Peninsular Ranges exhibit initial /sup 143/Nd//sup 144/Nd ratios that vary over a large range and correlate with /sup 87/Sr//sup 86/Sr ratios. The data suggest that the batholiths represent mixtures of materials derived from (i) chemically depleted mantle identical to the source of island arcs and (ii) old continental crust, probably sediments or metasediments with a provenance age of approx. 1.6 x 10/sup 9/ years. These conclusions are consistent with a model for continental growth whereby new crustal additions are repeatedly extracted from the same limited volume of the upper mantle, which has consequently become depleted in elements that are enriched in the crust. There is little evidence that hydrothermally altered, subducted oceanic crust is a primary source of the magmas.

Authors:: DePaolo, D J

Publication Date:: Fri Aug 08 00:00:00 EDT 1980

Research Org.:: Univ. of California, Los Angeles

OSTI Identifier:: 5246056

Resource Type:: Journal Article

Journal Name:: Science; (United States)

Additional Journal Information:: Journal Volume: 209

Country of Publication:: United States

Language:: English

Subject:: 58 GEOSCIENCES; CALIFORNIA; CONTINENTAL CRUST; GRANITES; PETROGENESIS; MEXICO; ISOTOPE DATING; ISOTOPE RATIO; NEODYMIUM 143; NEODYMIUM 144; STRONTIUM 86; STRONTIUM 87; AGE ESTIMATION; ALKALINE EARTH ISOTOPES; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; DEVELOPING COUNTRIES; EARTH CRUST; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HOURS LIVING RADIOISOTOPES; IGNEOUS ROCKS; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LATIN AMERICA; NEODYMIUM ISOTOPES; NORTH AMERICA; NUCLEI; PLUTONIC ROCKS; RADIOISOTOPES; RARE EARTH NUCLEI; ROCKS; STABLE ISOTOPES; STRONTIUM ISOTOPES; USA; WESTERN REGION; YEARS LIVING RADIOISOTOPES; 580100* - Geology & Hydrology- (-1989)

Citation Formats


                    DePaolo, D J. Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges.  United States: N. p., 1980. 
        Web.  doi:10.1126/science.209.4457.684.

Copy to clipboard


                    DePaolo, D J. Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges.  United States.  https://doi.org/10.1126/science.209.4457.684

Copy to clipboard


                    DePaolo, D J. 1980.  
        "Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges".  United States.  https://doi.org/10.1126/science.209.4457.684.

Copy to clipboard


                    
@article{osti_5246056,

  title        = {Sources of continental crust: neodymium isotope evidence from the Sierra Nevada and Peninsular ranges},

  author       = {DePaolo, D J},

  abstractNote = {Granitic rocks from batholiths of the Sierra Nevada and Peninsular Ranges exhibit initial /sup 143/Nd//sup 144/Nd ratios that vary over a large range and correlate with /sup 87/Sr//sup 86/Sr ratios. The data suggest that the batholiths represent mixtures of materials derived from (i) chemically depleted mantle identical to the source of island arcs and (ii) old continental crust, probably sediments or metasediments with a provenance age of approx. 1.6 x 10/sup 9/ years. These conclusions are consistent with a model for continental growth whereby new crustal additions are repeatedly extracted from the same limited volume of the upper mantle, which has consequently become depleted in elements that are enriched in the crust. There is little evidence that hydrothermally altered, subducted oceanic crust is a primary source of the magmas.},

  doi          = {10.1126/science.209.4457.684},

  url          = {https://www.osti.gov/biblio/5246056},
  journal      = {Science; (United States)},
number       = ,

  volume       = 209,

  place        = {United States},

  year         = {Fri Aug 08 00:00:00 EDT 1980},

  month        = {Fri Aug 08 00:00:00 EDT 1980}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1126/science.209.4457.684

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Samarium-neodymium and rubidium-strontium isotopic studies of the origin and evolution of continental crust

Thesis/Dissertation Nelson, B

Part I. Nd model ages of Precambrian granites from the U.S. midcontinent define crust-formation age provinces that young to the south. Much of this crust formed 1.7 to 1.9 b.y. ago. Patterns of continental growth deduced from this study emphasize the episodicity of crust formation, and suggest an average ago of 2.2 b.y. for the continent. Part II. Initial /sup 143/Nd//sup 144/Nd ratios of 1700 myr greenstones from the southwestern U.S. range from epsilon/sub Nd/ = +3.3 to +6.5, the highest values yet observed for mid-Proterozoic rocks. The change in epsilon/sub Nd/ of depleted mantle has been only 2 tomore »« less
Subduction recycling of continental sediments and the origin of geochemically enriched reservoirs in the deep mantle

Journal Article Rapp, R; Irifune, T; Shimizu, N; ... - Earth Planet. Sci. Lett.

Isotopic and trace element geochemical studies of ocean island basalts (OIBs) have for many years been used to infer the presence of long-lived ({approx} 1-2 Ga old) compositional heterogeneities in the deep mantle related to recycling of crustal lithologies and marine and terrigenous sediments via subduction [e.g., Zindler, A., Hart, S.R., 1986. Chemical geodynamics. Annu. Rev. Earth Planet. Sci. 14, 493-571; Weaver, B.L., 1991. The origin of ocean island basalt end-member compositions: trace element and isotopic constraints. Earth Planet. Sci. Lett. 104, 381-397; Chauvel, C., Hofmann, A.W., Vidal, P., 1992. HIMU-EM: the French Polynesian connection. Earth Planet. Sci. Lett. 110,more »« less
https://doi.org/10.1016/j.epsl.2008.02.028
Neodymium, strontium, and oxygen isotopic variations in the crust of the western United States: Origin of Proterozoic continental crust and tectonic implications

Miscellaneous Bennett, V

Initial Nd isotopic ratios of crystalline rocks from an area of about 1.5 {times} 10{sup 6} km{sup 2} of the western United States have been determined in order to map Precambrian age province boundaries and thus document the growth and modification of the North American continent in the Proterozoic. Three age provinces have been delineated. It is demonstrated that large regions of Early Proterozoic continental crust were formed with anomalous isotopic compositions ({sup 143}Nd/{sup 144}Nd ratios lower than Early Proterozoic depleted-mantle). The variations in the initial {epsilon}{sub Nd} and {delta}{sup 18}O values correlate with each other, and correspond to themore »« less
Mt. St. Augustine, Alaska: Geochemical evolution of an eastern Aleutian volcanic center

Conference Johnson, K; Harmon, R; Moorbath, S; ... - Geological Society of America, Abstracts with Programs; (United States)

Mt. St. Augustine is a calc-alkaline Quaternary volcano, situated within Cook Inlet, Alaska. The island is composed of low- to medium-K andesite and dacite domes and pyroclastic flows. Major element variations indicate the magmatic evolution is dominantly influenced by fractionation and magma-mixing processes. Incompatible element and isotopic compositions suggest that despite its continental location, crustal assimilation is not significant factor in magmatic evolution. Alkali contents for Augustine are generally lower than elsewhere in the Aleutians (e.g. Augustine Cs/Rb = 0.016--0.024, K/Rb = 372--553; Aleutians Cs/Rb = 0.016--0.17, K/Rb = 231--745). Sr- and Nd-isotope ratios encompass narrow ranges ([sup 87]Sr/[sup 86]Srmore »« less
Sources of island arcs as indicated by Nd and Sr isotopic studies

Journal Article DePaolo, D; Wasserburg, G - Geophys. Res. Lett.; (United States)

Island arc lavas from New Britain and the Marianas have /sup 143/Nd//sup 144/Nd similar to other oceanic basalts and distinctly different from continental flood basalts and thus appear to be derived from a high Sm/Nd, light-REE-depleted reservoir. Consideration of both Nd and Sr isotopes suggests seawater involvement in the generation of some island arc lavas and thus indicates that they may be derived from altered subducted oceanic crust. Other island arc lavas show no evidence of seawater involvement and may be derived from mantle reservoirs with affinities to the sources of ocean island basalts. Andesite and rhyolite from an Andeanmore »« less
https://doi.org/10.1029/GL004i010p00465

Similar Records