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Terrestrial weathering of Antarctic stone meteorites - Formation of Mg-carbonates on ordinary chondritesResults are presented on the mineralogy, chemistry, and origin of white efflorescences on the surface of Lewis Cliff (Antarctica) 85320 (H5) chondrite (LEW 85320). Particular attention is given to determining the sources of the cations and anions of the evaporite, in order to establish the relative importance of the meteoritic element distribution and terrestrial contamination in the evaporite formation during the weathering process. The data on Na, K, Ca, and Rb abundances in efflorescence from LEW 85320 suggest that cations in evaporite minerals on Antarctic meteorites are not the products of contamination by terrestrial (marine) salts. It is suggested that the Mg in efflorescence on LEW 85320 originated from weathering of meteoritic olivine.
Document ID
19910040095
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Velbel, Michael A.
(Michigan State Univ. East Lansing, MI, United States)
Long, David T.
(Michigan State University East Lansing, United States)
Gooding, James L.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 55
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
91A24718
Distribution Limits
Public
Copyright
Other

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