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Chemical studies of H chondrites. I - Mobile trace elements and gas retention agesTrends for 16 trace elements (Ag, As, Au, Bi, Cd, Co, Cs, Ga, In, K, Rb, Sb, Se, Te, Tl, and Zn), chosen to span a broad geochemical and thermal response range, in 44 H4-6 chondrites, differ widely from those in L4-6 chondrites. In particular, H chondrites classified as heavily shocked petrologically do not necessarily exhibit Ar-40 loss and vice versa. The clear-cut causal relationship between siderophile and mobile element loss with increasing late shock seen in L chondrites is not generally evident in the H group. H chondrite parent material experienced an early high temperature genetic episode that mobilized a substantial proportion of these trace elements so that later thermal episodes resulted in more subtle, collateral fractionations. Mildly shocked L chondrites escaped this early high temperature event, indicating that the two most numerous meteorite groups differ fundamentally in genetic history.
Document ID
19870052297
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lingner, David W.
(Purdue Univ. West Lafayette, IN, United States)
Huston, Ted J.
(Purdue Univ. West Lafayette, IN, United States)
Hutson, Melinda
(Purdue Univ. West Lafayette, IN, United States)
Lipschutz, Michael E.
(Purdue University West Lafayette, IN, United States)
Date Acquired
August 13, 2013
Publication Date
March 1, 1987
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 51
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
87A39571
Funding Number(s)
CONTRACT_GRANT: DE-FG02-80ER-10725
CONTRACT_GRANT: NAG9-48
Distribution Limits
Public
Copyright
Other

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