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Barred olivine 'chondrules' in lunar spinel troctolite 62295Several objects have been found in sections of lunar igneous spinel troctolite 62295 that resemble certain meteoritic barred olivine chondrules. Each consists of an apparently spherical single crystal of Fo90 olivine, approximately 0.6-0.8 mm in diameter, containing a set of approximately 30-40 subparallel stringers of An95 plagioclase, whereas the stringers in ordinary meteoritic chondrules consist of glass. The olivine of the 62295 chondrules is also more magnesian, and is radially zoned, having a relatively iron-rich core and rim and an iron-poor intermediate zone. Several possible origins are proposed: impact-generated melt globules solidified in flight, spherical phenocrysts, and meteoritic chondrules, but none of these seems adequate to explain the detailed observations.
Document ID
19780057796
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Roedder, E.
(U.S. Geological Survey Reston, Va., United States)
Weiblen, P. W.
(Minnesota, University Minneapolis, Minn., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 14, 1977
End Date: March 18, 1977
Accession Number
78A41705
Funding Number(s)
CONTRACT_GRANT: NSG-9050
CONTRACT_GRANT: NASA ORDER T-1170-A
Distribution Limits
Public
Copyright
Other

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