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Lunar basins and craters - Evidence for systematic compositional changes of bombarding populationOf the 33 lunar samples considered in the investigation, 31 came from the North Ray Crater. The relationship between meteoritic component and rock type is studied. There appears to be some correlation between the meteoritic component, as given by the Ir/Au ratio, and the rock type, as given by the U content. The relation of ancient meteoritic components to basins and craters is examined, taking into account the resolution of groups, the relative ages from clast-matrix relations, assignments to specific basins or craters, and the relation between meteoritic components and Woenke's 'primary matter'. A table shows seven meteorite-free samples which are all low-alkali cataclastic anorthosites, or anorthositic clasts in light-matrix breccias. The origin of ancient meteoritic bodies are also investigated. The latest data strengthen earlier conclusions that the basin-forming objects were genetically related to the moon.
Document ID
19780057644
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hertogen, J.
(Chicago Univ. Chicago, IL, United States)
Janssens, M.-J.
(Chicago Univ. Chicago, IL, United States)
Takahashi, H.
(Chicago Univ. Chicago, IL, United States)
Palme, H.
(Chicago Univ. Chicago, IL, United States)
Anders, E.
(Chicago, University Chicago, Ill., 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
78A41553
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-167
Distribution Limits
Public
Copyright
Other

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