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Olivines in angrite LEW 87051: Phenos or xenosNyquist et al. recently reported the presence of live Mn-53 in angrite LEW 86010 when it crystallized. Hence, melting must have occurred within approx. 10 Ma of the accretion of the angrite parent body, and LEW 86010 is the oldest known differentiated meteorite. This discovery has made it even more desirable to understand teh petrogenesis of angrites, which presumably were all formed at a similar time. As part of the continuing work on angrite petrogenesis, crystallization experiments were conducted on LEW 87051, the other Antarctic angrite, to clarify its petrogenesis. Several aspects of the experimental work is reported. Although the details are not understood, it is clear that the Cr abundance in the experimental olivines must be controlled by spinel crystallization.
Document ID
19920003706
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mckay, G. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Le, L. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Wagstaff, J. (Lockheed Engineering and Sciences Co. Houston, TX., United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Lunar and Planetary Inst., Abstracts for the 54th Annual Meeting of the Meteoritical Society
Subject Category
Astrophysics
Accession Number
92N12924
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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