NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
History and genesis of lunar troctolite 76535 or: How old is oldThe history of lunar troctolite 76535 was investigated on the basis of information from the Sm-147-Nd-143 mineral isochron age, the Nd-143 evolution, extinct Pu-224, the Kr-81-Kr exposure age and the cosmic ray exposure record. It was found that the troctolite minerals last equilibrated 4.26 plus or minus 0.06 AE ago and that the Sm-Nd system became closed at this time. The rock remained at temperatures where the loss of radiogenic Ar-40 was small.
Document ID
19770051914
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Lugmair, G. W. (California Univ. La Jolla, CA, United States)
Marti, K. (California Univ. La Jolla, CA, United States)
Kurtz, J. P. (California Univ. La Jolla, CA, United States)
Scheinin, N. B. (California, University La Jolla, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1976
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 15, 1976
End Date: March 19, 1976
Accession Number
77A34766
Funding Number(s)
CONTRACT_GRANT: NGR-05-009-150
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.

Related Records

There are no records associated with this record.
No Preview Available