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Apollo 15 KREEP-poor impact meltsResults are presented on the analysis of 18 fragments of the Apollo 15 KREEP-poor impact melt rock. This melt has gabbroic bulk composition, very low incompatible-element concentrations, and a slope in its heavy REE pattern that is distinct from that of KREEP. The melt has also the highest Ti content of LKFM impact melts from all highland sites. It is suggested that KREEP-poor impact melts may be basin-related melts which are mixtures of various Mg-suite noritic or gabbroic lower crustal rocks, and represent an early impact into the lower crust.
Document ID
19900046407
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lindstrom, M. M. (NASA Johnson Space Center Houston, TX, United States)
Marvin, U. B. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Holmberg, B. B. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Mittlefehldt, D. W. (Lockheed Engineering and Sciences Co. Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Country: United States
Start Date: March 13, 1989
End Date: March 17, 1989
Accession Number
90A33462
Funding Number(s)
CONTRACT_GRANT: NAG9-29
Distribution Limits
Public
Copyright
Other

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