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Chemical and physical studies of chondrites. X - Cathodoluminescence and phase composition studies of metamorphism and nebular processes in chondrules of type 3 ordinary chondritesThe cathodoluminescence (CL) characteristics of eight type-3 ordinary chondrites and one L5 chondrite were investigated with particular emphasis on detailed compositions of the relevant phases in four of these chondrites: Semarkona (type-3.0); Krymka (3.1); Allan Hills A77214 (3.5); and Dhajala (3.8). By sorting the chondrules into eight groups according to the CL of mesostasis and to certain compositional criteria and by determining the number of chondrules in these groups as a function of petrological type, it was possible to deduce genetic/evolutionary sequences of the chondrules. It is shown that there are major compositional differences in chondrules, which account for their CL properties and the chondrule groups.
Document ID
19930028356
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dehart, John M.
(Arkansas Univ., Fayetteville; NASA, Johnson Space Center Houston, TX, United States)
Lofgren, Gary E.
(NASA Johnson Space Center Houston, TX, United States)
Jie, LU
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Benoit, Paul H.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Sears, Derek W. G.
(Arkansas Univ. Fayetteville, United States)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 56
Issue: 10
ISSN: 0016-7037
Subject Category
Lunar And Planetary Exploration
Accession Number
93A12353
Funding Number(s)
CONTRACT_GRANT: NAG9-81
CONTRACT_GRANT: NGT-50064
Distribution Limits
Public
Copyright
Other

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