Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ~3.95&nbsp;Ga

Kruijer, Thomas S.; Borg, Lars E.; Cassata, William S.; Wimpenny, Josh; Brennecka, Greg A.; Shearer, Charles K.; Simon, Steven B.

doi:10.1016/j.gca.2023.07.026

Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ~3.95 Ga

Journal Article · Wed Aug 09 00:00:00 EDT 2023 · Geochimica et Cosmochimica Acta

DOI:https://doi.org/10.1016/j.gca.2023.07.026· OSTI ID:1996474

^[1]; Borg, Lars E. ^[1]; Cassata, William S. ^[1]; Wimpenny, Josh ^[1]; ^[1]; Shearer, Charles K. ^[2]; ^[3]

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Univ. of New Mexico, Albuquerque, NM (United States); Lunar and Planetary Institute, Houston, TX
Univ. of New Mexico, Albuquerque, NM (United States)

Alkali-suite rocks constitute one of three major suites of lunar crustal rocks. As such, constraining their formation timescales and petrogenesis is important for understanding the earliest magmatic history of the Moon. However, the magmatic history of alkali-suite rocks is partly obscured by superimposed effects of major basin-forming impact events on the lunar nearside. Consequently, unambiguous crystallization ages of samples from this suite of rocks have not been determined. Here, the aim of this study is to better understand the petrogenetic history of the alkali-suite and the potential superimposed effects of impact metamorphism by determining Sm-Nd, Rb-Sr, and ⁴⁰Ar/³⁹Ar ages for an alkali anorthosite clast from Apollo 14 lithic breccia 14304 termed clast “b”. The new chronologic measurements of clast “b” yield concordant Sm-Nd, Rb-Sr, and ⁴⁰Ar/³⁹Ar ages of 3947 ± 13 Ma, 3975 ± 34 Ma, and 3937 ± 37 Ma respectively, resulting in a weighted mean age of 3949 ± 11 Ma. This age is not interpreted to date an igneous event related to production of the lunar highlands crust and instead the chronology and petrography of clast “b” are most readily explained by an impact event at ~3.95 Ga that caused near-complete isotopic re-equilibration of the Sm-Nd, Rb-Sr, and ⁴⁰Ar/³⁹Ar chronometers. The weighted mean age of 3949 ± 11 Ma of clast “b” is several hundred Ma younger than 4.3–4.4 Ga ages typically determined for samples of other crustal rock suites but in very good agreement with independent estimates for the formation of Imbrium basin ejecta and other marginally older impact events which are thought to have been sampled at the Apollo 14 landing site. Thus, although petrologic and geochemical examination suggest that clast “b” is a pristine igneous clast, its age likely records an impact event at the Apollo 14 landing site. Whereas the various determined ages of clast “b” do not reflect the timescales of alkali-suite magmatism, the relatively low initial Sr and Nd isotopic compositions of clast “b” indicate that its protolith evolved with very low ¹⁴⁷Sm/¹⁴⁴Nd and ⁸⁷Rb/⁸⁶Sr that are distinct from estimates for urKREEP but similar to that of lunar plagioclase. This implies that the igneous protolith of clast “b” derived from a plagioclase-dominated KREEP-rich source that must have formed after the formation of the urKREEP source at ~4.35 Ga but well before the impact event recorded by clast “b” at ~3.95 Ga.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1996474

Alternate ID(s):: OSTI ID: 1995602

Report Number(s):: LLNL-JRNL-844335; 1067661

Journal Information:: Geochimica et Cosmochimica Acta, Journal Name: Geochimica et Cosmochimica Acta Vol. 358; ISSN 0016-7037

Publisher:: Elsevier; The Geochemical Society; The Meteoritical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (76)

Closure temperature in cooling geochronological and petrological systems Dodson, Martin H. Contributions to Mineralogy and Petrology, Vol. 40, Issue 3 https://doi.org/10.1007/BF00373790	journal	January 1973
40Ar-39Ar ages and cosmic ray exposure ages of Apollo 14 samples Turner, G.; Huneke, J. C.; Podosek, F. A. Earth and Planetary Science Letters, Vol. 12, Issue 1 https://doi.org/10.1016/0012-821X(71)90051-3	journal	September 1971
RbSr ages of igneous rocks from the Apollo 14 mission and the age of the Fra Mauro formation Papanastassiou, D. A.; Wasserburg, G. J. Earth and Planetary Science Letters, Vol. 12, Issue 1 https://doi.org/10.1016/0012-821X(71)90052-5	journal	September 1971
Chemical composition of lunar anorthosites and their parent liquids Hubbard, N. J.; Gast, P. W.; Meyer, C. Earth and Planetary Science Letters, Vol. 13, Issue 1 https://doi.org/10.1016/0012-821X(71)90106-3	journal	December 1971
Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology Steiger, R. H.; Jäger, E. Earth and Planetary Science Letters, Vol. 36, Issue 3 https://doi.org/10.1016/0012-821X(77)90060-7	journal	October 1977
Sm-Nd age of lherzolite 67667: implications for the processes involved in lunar crustal formation Carlson, R. W.; Lugmair, G. W. Earth and Planetary Science Letters, Vol. 56 https://doi.org/10.1016/0012-821X(81)90112-6	journal	December 1981
The age of ferroan anorthosite 60025: oldest crust on a young Moon? Carlson, Richard W.; Lugmair, Gunter W. Earth and Planetary Science Letters, Vol. 90, Issue 2 https://doi.org/10.1016/0012-821X(88)90095-7	journal	October 1988
Precise determination of initial ϵNd from Sm-Nd isochron data Fletcher, I. R.; Rosman, K. J. R. Geochimica et Cosmochimica Acta, Vol. 46, Issue 10 https://doi.org/10.1016/0016-7037(82)90138-7	journal	October 1982
Abundances of the elements: Meteoritic and solar Anders, Edward; Grevesse, Nicolas Geochimica et Cosmochimica Acta, Vol. 53, Issue 1 https://doi.org/10.1016/0016-7037(89)90286-X	journal	January 1989
The isotopic record of lunar volcanism Nyquist, L. E.; Shih, C. -Y Geochimica et Cosmochimica Acta, Vol. 56, Issue 6 https://doi.org/10.1016/0016-7037(92)90185-L	journal	June 1992
Common asteroid break-up events of eucrites, diogenites, and howardites and cosmic-ray production rates for noble gases in achondrites Eugster, O.; Michel, Th. Geochimica et Cosmochimica Acta, Vol. 59, Issue 1 https://doi.org/10.1016/0016-7037(94)00327-I	journal	January 1995
An ancient Sm-Nd age for a ferroan noritic anorthosite clast from lunar breccia 67016 Alibert, Chantal; Norman, Marc D.; McCulloch, Malcolm T. Geochimica et Cosmochimica Acta, Vol. 58, Issue 13 https://doi.org/10.1016/0016-7037(94)90125-2	journal	July 1994
Chronology and petrogenesis of the lunar highlands alkali suite: Cumulates from KREEP basalt crystallization Snyder, Gregory A.; Taylor, Lawrence A.; Halliday, Alex N. Geochimica et Cosmochimica Acta, Vol. 59, Issue 6 https://doi.org/10.1016/0016-7037(95)00034-W	journal	March 1995
146Sm-142Nd formation interval for the lunar mantle Nyquist, L. E.; Wiesmann, H.; Bansal, B. Geochimica et Cosmochimica Acta, Vol. 59, Issue 13 https://doi.org/10.1016/0016-7037(95)00175-Y	journal	July 1995
Isotopic studies of ferroan anorthosite 62236: a young lunar crustal rock from a light rare-earth-element-depleted source Borg, Lars; Norman, Marc; Nyquist, Larry Geochimica et Cosmochimica Acta, Vol. 63, Issue 17 https://doi.org/10.1016/S0016-7037(99)00130-1	journal	October 1999
Ages of lunar impact breccias: Limits for timing of the Imbrium impact Nemchin, Alexander A.; Long, Tao; Jolliff, Bradley L. Geochemistry, Vol. 81, Issue 1 https://doi.org/10.1016/j.chemer.2020.125683	journal	April 2021
A highly depleted moon or a non-magma ocean origin for the lunar crust? Boyet, Maud; Carlson, Richard W. Earth and Planetary Science Letters, Vol. 262, Issue 3-4 https://doi.org/10.1016/j.epsl.2007.08.009	journal	October 2007
The Lu–Hf and Sm–Nd isotopic composition of CHUR: Constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets Bouvier, Audrey; Vervoort, Jeffrey D.; Patchett, P. Jonathan Earth and Planetary Science Letters, Vol. 273, Issue 1-2 https://doi.org/10.1016/j.epsl.2008.06.010	journal	August 2008
Lu–Hf zircon evidence for rapid lunar differentiation Taylor, Dianne J.; McKeegan, Kevin D.; Harrison, T. Mark Earth and Planetary Science Letters, Vol. 279, Issue 3-4 https://doi.org/10.1016/j.epsl.2008.12.030	journal	March 2009
Isotopic evidence for chondritic Lu/Hf and Sm/Nd of the Moon Sprung, Peter; Kleine, Thorsten; Scherer, Erik E. Earth and Planetary Science Letters, Vol. 380 https://doi.org/10.1016/j.epsl.2013.08.018	journal	October 2013
Constraints on the formation age and evolution of the Moon from 142Nd–143Nd systematics of Apollo 12 basalts McLeod, Claire L.; Brandon, Alan D.; Armytage, Rosalind M. G. Earth and Planetary Science Letters, Vol. 396 https://doi.org/10.1016/j.epsl.2014.04.007	journal	June 2014
Isotopic evidence for a young lunar magma ocean Borg, Lars E.; Gaffney, Amy M.; Kruijer, Thomas S. Earth and Planetary Science Letters, Vol. 523 https://doi.org/10.1016/j.epsl.2019.07.008	journal	October 2019
The timing of lunar solidification and mantle overturn recorded in ferroan anorthosite 62237 Sio, C. K.; Borg, L. E.; Cassata, W. S. Earth and Planetary Science Letters, Vol. 538 https://doi.org/10.1016/j.epsl.2020.116219	journal	May 2020
Timing of lunar Mg-suite magmatism constrained by SIMS U-Pb dating of Apollo norite 78238 Zhang, Bidong; Lin, Yangting; Moser, Desmond E. Earth and Planetary Science Letters, Vol. 569 https://doi.org/10.1016/j.epsl.2021.117046	journal	September 2021
Oxygen isotopic signature of 4.4–3.9Ga zircons as a monitor of differentiation processes on the Moon Nemchin, A. A.; Whitehouse, M. J.; Pidgeon, R. T. Geochimica et Cosmochimica Acta, Vol. 70, Issue 7 https://doi.org/10.1016/j.gca.2005.12.009	journal	April 2006
Identifying impact events within the lunar cataclysm from 40Ar–39Ar ages and compositions of Apollo 16 impact melt rocks Norman, Marc D.; Duncan, Robert A.; Huard, John J. Geochimica et Cosmochimica Acta, Vol. 70, Issue 24 https://doi.org/10.1016/j.gca.2006.05.021	journal	December 2006
Feldspathic clasts in Yamato-86032: Remnants of the lunar crust with implications for its formation and impact history Nyquist, L.; Bogard, D.; Yamaguchi, A. Geochimica et Cosmochimica Acta, Vol. 70, Issue 24 https://doi.org/10.1016/j.gca.2006.07.042	journal	December 2006
Cooling history of lunar Mg-suite gabbronorite 76255, troctolite 76535 and Stillwater pyroxenite SC-936: The record in exsolution and ordering in pyroxenes McCallum, I. Stewart; Domeneghetti, M. Chiara; Schwartz, Jeffrey M. Geochimica et Cosmochimica Acta, Vol. 70, Issue 24 https://doi.org/10.1016/j.gca.2006.08.009	journal	December 2006
Complex history of a zircon aggregate from lunar breccia 73235 Pidgeon, R. T.; Nemchin, A. A.; van Bronswijk, W. Geochimica et Cosmochimica Acta, Vol. 71, Issue 5 https://doi.org/10.1016/j.gca.2006.11.021	journal	March 2007
Solar and cosmogenic argon in dated lunar impact spherules Levine, Jonathan; Renne, Paul R.; Muller, Richard A. Geochimica et Cosmochimica Acta, Vol. 71, Issue 6 https://doi.org/10.1016/j.gca.2006.11.034	journal	March 2007
SIMS U–Pb study of zircon from Apollo 14 and 17 breccias: Implications for the evolution of lunar KREEP Nemchin, A. A.; Pidgeon, R. T.; Whitehouse, M. J. Geochimica et Cosmochimica Acta, Vol. 72, Issue 2 https://doi.org/10.1016/j.gca.2007.11.009	journal	January 2008
Thermal history recorded by the Apollo 17 impact melt breccia 73217 Grange, M. L.; Nemchin, A. A.; Pidgeon, R. T. Geochimica et Cosmochimica Acta, Vol. 73, Issue 10 https://doi.org/10.1016/j.gca.2009.02.032	journal	May 2009
Mechanisms for incompatible-element enrichment on the Moon deduced from the lunar basaltic meteorite Northwest Africa 032 Borg, Lars E.; Gaffney, Amy M.; Shearer, Charles K. Geochimica et Cosmochimica Acta, Vol. 73, Issue 13 https://doi.org/10.1016/j.gca.2009.03.039	journal	July 2009
Re-evaluating 142Nd/144Nd in lunar mare basalts with implications for the early evolution and bulk Sm/Nd of the Moon Brandon, Alan D.; Lapen, Thomas J.; Debaille, Vinciane Geochimica et Cosmochimica Acta, Vol. 73, Issue 20 https://doi.org/10.1016/j.gca.2009.07.015	journal	October 2009
Complex magmatic and impact history prior to 4.1Ga recorded in zircon from Apollo 17 South Massif aphanitic breccia 73235 Grange, M. L.; Nemchin, A. A.; Timms, N. Geochimica et Cosmochimica Acta, Vol. 75, Issue 8 https://doi.org/10.1016/j.gca.2011.01.036	journal	April 2011
Response to the comment by W.H. Schwarz et al. on “Joint determination of 40K decay constants and 40Ar∗/40K for the Fish Canyon sanidine standard, and improved accuracy for 40Ar/39Ar geochronology” by P.R. Renne et al. (2010) Renne, Paul R.; Balco, Greg; Ludwig, Kenneth R. Geochimica et Cosmochimica Acta, Vol. 75, Issue 17 https://doi.org/10.1016/j.gca.2011.06.021	journal	September 2011
Thermal history of Apollo 12 granite and KREEP-rich rock: Clues from Pb/Pb ages of zircon in lunar breccia 12013 Zhang, Ai-Cheng; Taylor, Lawrence A.; Wang, Ru-Cheng Geochimica et Cosmochimica Acta, Vol. 95 https://doi.org/10.1016/j.gca.2012.07.023	journal	October 2012
Interpreting U–Pb data from primary and secondary features in lunar zircon Grange, M. L.; Pidgeon, R. T.; Nemchin, A. A. Geochimica et Cosmochimica Acta, Vol. 101 https://doi.org/10.1016/j.gca.2012.10.013	journal	January 2013
A young solidification age for the lunar magma ocean Gaffney, Amy M.; Borg, Lars E. Geochimica et Cosmochimica Acta, Vol. 140 https://doi.org/10.1016/j.gca.2014.05.028	journal	September 2014
Sm–Nd systematics of lunar ferroan anorthositic suite rocks: Constraints on lunar crust formation Boyet, Maud; Carlson, Richard W.; Borg, Lars E. Geochimica et Cosmochimica Acta, Vol. 148 https://doi.org/10.1016/j.gca.2014.09.021	journal	January 2015
Paleotemperatures at the lunar surfaces from open system behavior of cosmogenic 38Ar and radiogenic 40Ar Shuster, David L.; Cassata, William S. Geochimica et Cosmochimica Acta, Vol. 155 https://doi.org/10.1016/j.gca.2015.01.037	journal	April 2015
Phosphate ages in Apollo 14 breccias: Resolving multiple impact events with high precision U–Pb SIMS analyses Snape, J. F.; Nemchin, A. A.; Grange, M. L. Geochimica et Cosmochimica Acta, Vol. 174 https://doi.org/10.1016/j.gca.2015.11.005	journal	February 2016
Chronologic implications for slow cooling of troctolite 76535 and temporal relationships between the Mg-suite and the ferroan anorthosite suite Borg, Lars E.; Connelly, James N.; Cassata, William S. Geochimica et Cosmochimica Acta, Vol. 201 https://doi.org/10.1016/j.gca.2016.11.021	journal	March 2017
The formation and evolution of the Moon’s crust inferred from the Sm-Nd isotopic systematics of highlands rocks Borg, Lars E.; Cassata, William S.; Wimpenny, Josh Geochimica et Cosmochimica Acta, Vol. 290 https://doi.org/10.1016/j.gca.2020.09.013	journal	December 2020
A window into atmospheric escape on early Mars provided by argon isotopes in a Martian meteorite Willett, Chelsea D.; Cassata, William S.; Marks, Naomi E. Geochimica et Cosmochimica Acta, Vol. 329 https://doi.org/10.1016/j.gca.2022.04.017	journal	July 2022
Launch of martian meteorites in oblique impacts Artemieva, Natalia; Ivanov, Boris Icarus, Vol. 171, Issue 1 https://doi.org/10.1016/j.icarus.2004.05.003	journal	September 2004
Lunar Mg suite: Thermobarometry and petrogenesis of parental magmas McCallum, I. S.; Schwartz, J. M. Journal of Geophysical Research: Planets, Vol. 106, Issue E11 https://doi.org/10.1029/2000JE001397	journal	November 2001
Geochronology of an Apollo 16 Clast Provides Evidence for a Basin‐Forming Impact 4.3 Billion Years Ago Marks, N. E.; Borg, L. E.; Shearer, C. K. Journal of Geophysical Research: Planets, Vol. 124, Issue 10 https://doi.org/10.1029/2019JE005966	journal	October 2019
Seventh Foray: Whitlockite-rich lithologies, a diopside-bearing troctolitic anorthosite, Ferroan anorthosites, and KREEP Warren, Paul H.; Taylor, G. Jeffrey; Keil, Klaus Journal of Geophysical Research, Vol. 88, Issue S01 https://doi.org/10.1029/JB088iS01p0B151	journal	January 1983
The magma ocean from the Fra Mauro shoreline: An overview of the Apollo 14 crust Hunter, Robert H.; Taylor, Lawrence A. Journal of Geophysical Research, Vol. 88, Issue S02 https://doi.org/10.1029/JB088iS02p0A591	journal	January 1983
Sixth foray for pristine nonmare rocks and an assessment of the diversity of lunar anorthosites Warren, Paul H.; Taylor, G. Jeffrey; Keil, Klaus Journal of Geophysical Research, Vol. 88, Issue S02 https://doi.org/10.1029/JB088iS02p0A615	journal	January 1983
Pristine Moon rocks: A “large” felsite and a metal-rich ferroan anorthosite Warren, Paul H.; Jerde, Eric A.; Kallemeyn, Gregory W. Journal of Geophysical Research: Solid Earth, Vol. 92, Issue B4 https://doi.org/10.1029/JB092iB04p0E303	journal	March 1987
The origin of KREEP Warren, Paul H.; Wasson, John T. Reviews of Geophysics, Vol. 17, Issue 1 https://doi.org/10.1029/RG017i001p00073	journal	January 1979
Chronological evidence that the Moon is either young or did not have a global magma ocean Borg, Lars E.; Connelly, James N.; Boyet, Maud Nature, Vol. 477, Issue 7362 https://doi.org/10.1038/nature10328	journal	August 2011
Hadean age for a post-magma-ocean zircon confirmed by atom-probe tomography Valley, John W.; Cavosie, Aaron J.; Ushikubo, Takayuki Nature Geoscience, Vol. 7, Issue 3 https://doi.org/10.1038/ngeo2075	journal	February 2014
Timing of crystallization of the lunar magma ocean constrained by the oldest zircon Nemchin, A.; Timms, N.; Pidgeon, R. Nature Geoscience, Vol. 2, Issue 2 https://doi.org/10.1038/ngeo417	journal	January 2009
The origin of volatile elements in the Earth–Moon system Borg, Lars E.; Brennecka, Gregory A.; Kruijer, Thomas S. Proceedings of the National Academy of Sciences, Vol. 119, Issue 8 https://doi.org/10.1073/pnas.2115726119	journal	February 2022
Uranium-lead ages for lunar zircons: Evidence for a prolonged period of granophyre formation from 4.32 to 3.88 Ga Meyer, Charles; Williams, Ian S.; Compston, William Meteoritics & Planetary Science, Vol. 31, Issue 3 https://doi.org/10.1111/j.1945-5100.1996.tb02075.x	journal	May 1996
Chronology, geochemistry, and petrology of a ferroan noritic anorthosite clast from Descartes breccia 67215: Clues to the age, origin, structure, and impact history of the lunar crust Norman, Marc D.; Borg, Lars E.; Nyquist, Lawrence E. Meteoritics & Planetary Science, Vol. 38, Issue 4 https://doi.org/10.1111/j.1945-5100.2003.tb00031.x	journal	April 2003
Ejection of Martian meteorites Fritz, Jörg; Artemieva, Natalia; Greshake, Ansgar Meteoritics & Planetary Science, Vol. 40, Issue 9-10 https://doi.org/10.1111/j.1945-5100.2005.tb00409.x	journal	October 2005
The comparative behavior of apatite-zircon U-Pb systems in Apollo 14 breccias: Implications for the thermal history of the Fra Mauro Formation Nemchin, A. A.; Pidgeon, R. T.; Healy, D. Meteoritics & Planetary Science, Vol. 44, Issue 11 https://doi.org/10.1111/j.1945-5100.2009.tb01202.x	journal	November 2009
A review of lunar chronology revealing a preponderance of 4.34-4.37 Ga ages Borg, Lars E.; Gaffney, Amy M.; Shearer, Charles K. Meteoritics & Planetary Science, Vol. 50, Issue 4 https://doi.org/10.1111/maps.12373	journal	November 2014
High resolution U-Pb ages of Ca-phosphates in Apollo 14 breccias: Implications for the age of the Imbrium impact Merle, R. E.; Nemchin, A. A.; Grange, M. L. Meteoritics & Planetary Science, Vol. 49, Issue 12 https://doi.org/10.1111/maps.12395	journal	November 2014
Origin and transportation history of lunar breccia 14311 Merle, Renaud E.; Nemchin, Alexander A.; Whitehouse, Martin J. Meteoritics & Planetary Science, Vol. 52, Issue 5 https://doi.org/10.1111/maps.12835	journal	February 2017
Annealing history of zircons from Apollo 14083 and 14303 impact breccias Pidgeon, R. T.; Merle, R. E.; Grange, M. L. Meteoritics & Planetary Science, Vol. 53, Issue 12 https://doi.org/10.1111/maps.13185	journal	August 2018
Time Scales of Critical Events Around the Cretaceous-Paleogene Boundary Renne, P. R.; Deino, A. L.; Hilgen, F. J. Science, Vol. 339, Issue 6120 https://doi.org/10.1126/science.1230492	journal	February 2013
Geologic Setting of the Apollo 14 Samples Swann, G. A.; Trask, N. J.; Hait, M. H. Science, Vol. 173, Issue 3998 https://doi.org/10.1126/science.173.3998.716	journal	August 1971
Chemistry, Geochronology, and Petrogenesis of Lunar Sample 15555 Chappell, B. W.; Compston, W.; Green, D. H. Science, Vol. 175, Issue 4020 https://doi.org/10.1126/science.175.4020.415	journal	January 1972
The Evolving Chronology of Moon Formation Borg, Lars E.; Carlson, Richard W. Annual Review of Earth and Planetary Sciences, Vol. 51, Issue 1 https://doi.org/10.1146/annurev-earth-031621-060538	journal	May 2023
The Late Heavy Bombardment Bottke, William F.; Norman, Marc D. Annual Review of Earth and Planetary Sciences, Vol. 45, Issue 1 https://doi.org/10.1146/annurev-earth-063016-020131	journal	August 2017
Stratigraphy of the lunar highland crust; depths of burial of lunar samples from cooling-rate studies McCallum, I. S.; O'Brien, Hugh E. American Mineralogist, Vol. 81, Issue 9-10 https://doi.org/10.2138/am-1996-9-1015	journal	October 1996
KREEP cumulates in the western lunar highlands; ion and electron microprobe study of alkali-suite anorthosites and norites from Apollo 12 and 14 Shervais, John W.; McGee, James J. American Mineralogist, Vol. 84, Issue 5-6 https://doi.org/10.2138/am-1999-5-615	journal	June 1999
Origin of the lunar highlands Mg-suite: An integrated petrology, geochemistry, chronology, and remote sensing perspective Shearer, C. K.; Elardo, S. M.; Petro, N. E. American Mineralogist, Vol. 100, Issue 1 https://doi.org/10.2138/am-2015-4817	journal	December 2014
Cosmic-Ray-Produced Noble Gases in Meteorites Wieler, R. Reviews in Mineralogy and Geochemistry, Vol. 47, Issue 1 https://doi.org/10.2138/rmg.2002.47.5	journal	January 2002
Cratering History and Lunar Chronology Stoffler, D. Reviews in Mineralogy and Geochemistry, Vol. 60, Issue 1 https://doi.org/10.2138/rmg.2006.60.05	journal	January 2006
Thermal and Magmatic Evolution of the Moon Shearer, C. K. Reviews in Mineralogy and Geochemistry, Vol. 60, Issue 1 https://doi.org/10.2138/rmg.2006.60.4	journal	January 2006

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Alkali-suite magmatism
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Lunar Highlands crust
Mare Imbrium
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Chronology of alkali anorthosite 14304 clast “b” records basin forming impact at ~3.95 Ga

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