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Petrology and pairing of mesosiderites from Victoria Land, AntarcticaPetrological data on mesosiderites from Reckling Peak (RKP) and Allan Hills (ALH), Antarctica, are presented. The results suggest that the Allan Hills mesosiderites A77219, A81059, and A81098 are probably paired (being of similar texture, modes, and mineral composition), and ALHA 81208 is, most likely, a clast from one of these mesosiderites. RKPA 80258 is a weakly poikilitic plagioclase-poor mesosiderite, completely different from ALHA 77219, 81059, and 81098. On the other hand, RKPA 79015, 80229, 80246, and 80263 are very similar, belonging to subgroup C diogenitic mesosiderites. These mesosiderites contain orthopyroxene and recrystallized orthopyroxenite clasts in a metal-troilite matrix. The silicate fraction of mesosiderites ranged from diogenitic (RKPA 79015) to analogous to polymict eurcrite (Dyarrl Island). On the basis of petrologic data, the mesosiderite subdivision scheme was amended, making it possible to classify the formerly 'anomalous' RKPA 79015.
Document ID
19880067952
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hewins, Roger H.
(Rutgers University New Brunswick, NJ, United States)
Date Acquired
August 13, 2013
Publication Date
June 1, 1988
Publication Information
Publication: Meteoritics
Volume: 23
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
88A55179
Funding Number(s)
CONTRACT_GRANT: NAG9-35
Distribution Limits
Public
Copyright
Other

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