NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
A Sr and Nd isotopic study of five Yamato polymict eucrites and a comparison to other Antarctic and ordinary eucritesSr and Nd isotopic analysis of five Yamato polymict eucrites indicate that these samples formed at about 4.6 Ga ago with initial Sr and Nd ratios essentially the same as the analyzed non-Antarctic eucrites. The Yamato eucrites have Sr, Sm, and Nd concentrations that consistently lie among the highest found in eucritic samples. This characteristic identifies these Yamato samples as a closely related group. Comparisons between these Yamato samples and other Antarctic polymict eucrites clearly estabishes that they all share some characteristic trace element features. Comparisons of Antarctic polymict eucrites with non-Antarctic ordinary eucrites reveal consistent differences. The most obvious is an enrichment of Rb in the polymict eucrites. These comparisons suggest that the Antarctic polymict eucrites belong to a single large family of material that is itself fairly diverse and distinct from the non-Antarctic eucrites.
Document ID
19850065197
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wooden, J. L.
(Lunar and Planetary Institute Houston, TX, United States)
Takeda, H.
(Tokyo, University Japan)
Nyquist, L. E.
(NASA Johnson Space Center Houston, TX, United States)
Wiesmann, H.
(Lunar and Planetary Inst. Houston, TX, United States)
Bansal, B.
(Lockheed Engineering and Management Services Co., Inc. Houston, TX, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1983
Publication Information
Publication: National Institute of Polar Research, Memoirs, Special Issue
Issue: 30, D
ISSN: 0386-0744
Subject Category
Lunar And Planetary Exploration
Accession Number
85A47348
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available