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Petrology of ALH85085 - A chondrite with unique characteristicsThe characteristics of the chondrite ALH85085 are examined. It is found that the chondrules of ALH85085 are 25-75 microns in size. The majority of the chondrules are cryptocrystalline and all of them are volatile depleted. It is shown that the FeNi metal abundance is 40.9 wt pct and the sulfide abundance is 1.1 wt pct. The matrix lumps and bulk composition of ALH85085 are analyzed. The characteristics of ALH85085 are compared with other chondrite groups, showing that it cannot be classified. The possible origin of ALH85085 is analyzed, showing trends similar to those of calculated nebular condensation paths indicating a nebular origin.
Document ID
19890037561
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Weisberg, Michael K.
(American Museum of Natural History New York, NY, United States)
Nehru, Cherukupalli E.
(American Museum of Natural History New York; Brooklyn College, NY, United States)
Prinz, Martin
(American Museum of Natural History New York, United States)
Date Acquired
August 14, 2013
Publication Date
December 1, 1988
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 91
Issue: 1-2
ISSN: 0012-821X
Subject Category
Lunar And Planetary Exploration
Accession Number
89A24932
Funding Number(s)
CONTRACT_GRANT: NAG9-32
Distribution Limits
Public
Copyright
Other

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