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Comparative petrology of Apollo 16 sample 68415 and Apollo 14 samples 14276 and 14310

Gancarz, A. J. and Albee, A. L. and Chodos, A. A. (1972) Comparative petrology of Apollo 16 sample 68415 and Apollo 14 samples 14276 and 14310. Earth and Planetary Science Letters, 16 (3). pp. 307-330. ISSN 0012-821X. doi:10.1016/0012-821X(72)90150-1.

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Petrographic and electron microprobe studies of Apollo 16 igneous rock 68415 and Apollo 14 rocks 14276 and 14310 show that all three samples differ from the mare basalts and are characterized by plagioclase as the first liquidus phase and by the abundance of plagioclase which is in part cumulate in origin. Major and minor element abundances and isotopic data prohibit the derivation of rocks like any of these samples from one another by magmatic fractionation during their crystallization. They could have originated by partial melting of an old, more Al-rich source material without isotopic equilibration with the residuum, by complete melting of three independent sources, or by contamination with old radiogenic material. The existence of such feldspathic basalts indicates that the generation of Al-rich magmas may have been an important and widespread lunar process.

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Additional Information:© 1972 Published by Elsevier B.V. Received 25 September 1972. We have greatly benefited from a series of heated discussions with G.J. Wasserburg and D. Papanastassiou, and from detailed comments upon the manuscript by R. Dymek, C. Gray, J.C. Huneke, D. Papanastassiou, and G.J. Wasserburg. E. Haines provided fission-track data on sample 14276. This work was supported by NASA contract NAS-9-8074. The microprobe laboratory has been developed with the support of NSF, JPL, and the Union Pacific Foundation.
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Union Pacific FoundationUNSPECIFIED
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Caltech Division of Geological and Planetary Sciences2225
Issue or Number:3
Record Number:CaltechAUTHORS:20180307-083914238
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Official Citation:A.J. Gancarz, A.L. Albee, A.A. Chodos, Comparative petrology of Apollo 16 sample 68415 and Apollo 14 samples 14276 and 14310, Earth and Planetary Science Letters, Volume 16, Issue 3, 1972, Pages 307-330, ISSN 0012-821X,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85166
Deposited By: Tony Diaz
Deposited On:07 Mar 2018 17:23
Last Modified:15 Nov 2021 20:26

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