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Mineralogy, petrology and geochemistry of carbonaceous chondritic clasts in the LEW 85300 polymict eucriteWe have performed a detailed petrologic and mineralogic study of two chondritic clasts from the polymict eucrite Lewis Cliff (LEW) 85300, and performed chemical analyses by INAA and RNAA on one of these. Petrologically, the clasts are identified and are composed of dispersed aggregates, chondrules, and chondrule fragments supported by matrix. The aggregates and chondrules are composed of olivine, orthopyroxene, plus some diopside. The matrix consists of fine-grained olivine, and lesser orthopyroxene and augite. Fine-grained saponite is common in the matrix. The bulk major composition of the clast studied by INAA and RNAA shows unusual abundance patterns for lithophile, siderophile and chalcophile elements but is basically chondritic. The INAA/RNAA data preclude assignment of the LEW 85300,15 clast to any commonly accepted group of carbonaceous chondrite.
Document ID
19930041163
Document Type
Reprint (Version printed in journal)
Authors
Zolensky, M. E. (NASA Johnson Space Center Houston, TX, United States)
Hewins, R. H. (Rutgers Univ. New Brunswick, NJ, United States)
Mittlefehldt, D. W. (Lockheed Engineering & Sciences Co. Houston, TX, United States)
Lindstrom, M. M. (NASA Johnson Space Center Houston, TX, United States)
Xiao, X. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Lipschutz, M. E. (Purdue Univ. West Lafayette, IN, United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1992
Publication Information
Publication: Meteoritics
Volume: 27
Issue: 5
ISSN: 0026-1114
Subject Category
LUNAR AND PLANETARY EXPLORATION
Funding Number(s)
CONTRACT_GRANT: NSG9-35
CONTRACT_GRANT: NAG9-48
PROJECT: RTOP 152-13-40-21
PROJECT: RTOP 452-12-92-02
Distribution Limits
Public
Copyright
Other