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Excess lead in "rusty rock" 66095 and implications for an early lunar differentiation

Science

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Abstract

Apollo 16 breccia 66095 contains a remarkably high amount of lead (15 part's per million), 85 percent of which is not supported by uranium and thorium in the rock. An acid leach experiment coupled with separate analyses of the whole rock and mineral fractions for uranium, thorium, and lead indicate that the excess lead has a lunar source and was apparently introduced about 4.0 X 109 years ago. The data also suggest that a major lunar crustal differentiation occurred about 4.47 X 109 years ago.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Excess lead in "rusty rock" 66095 and implications for an early lunar differentiation
Series title:
Science
Volume
182
Issue:
4115
Year Published:
1973
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
916
Last page:
920
Number of Pages:
5