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The Kenna ureilite - An ultramafic rock with evidence for igneous, metamorphic, and shock originUreilites are a rare group of achondrites. They are composed mainly of olivine and pigeonite in a matrix of carbonaceous material, including graphite, lonsdaleite, diamond, and metal. In most respects Kenna is a typical ureilite with the requisite mineralogical and chemical properties of the group. Differences of the Kenna ureilite from previously studied ureilites are related to a greater density, the occurrence of exceedingly minute quantities of feldspar, and a very strong elongation lineation of the silicate minerals. A description is presented of a study which indicates a complex history for Kenna, including igneous, mild metamorphic, and shock processes.
Document ID
19770031210
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Berkley, J. L.
(American Meteorite Lab. Denver, CO, United States)
Brown, H. G.
(American Meteorite Lab. Denver, CO, United States)
Keil, K.
(New Mexico, University Albuquerque, N. Mex., United States)
Carter, N. L.
(American Meteorite Lab. Denver, CO, United States)
Mercier, J.-C. C.
(New York, State University Stony Brook, N.Y., United States)
Huss, G.
(American Meteorite Laboratory Denver, Colo., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1976
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 40
Subject Category
Lunar And Planetary Exploration
Accession Number
77A14062
Funding Number(s)
CONTRACT_GRANT: NGL-32-004-064
Distribution Limits
Public
Copyright
Other

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