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Record Details

Record 55 of 1479
Isotopic and chemical investigations on Angra dos Reis
External Online Source: doi:10.1016/0012-821X(77)90133-9
Author and Affiliation:
Wasserburg, G. J.(California Inst. of Tech., Pasadena, CA, United States)
Tera, F.(California Inst. of Tech., Pasadena, CA, United States)
Papanastassiou, D. A.(California Inst. of Tech., Pasadena, CA, United States)
Huneke, J. C.(California Institute of Technology, Pasadena, Calif., United States)
Abstract: Isotope ratios and chemical abundance measurements for a variety of elements are reported for total meteorite and mineral separates of the Angra dos Reis achondrite. U-Pb, Th-Pb, and Pb-Pb ages are concordant at 4.54 eons for the total meteorite and for high-purity whitlockite, which indicates that Angra dos Reis is an early planetary differentiate that has not been disturbed for these systems since 4.54 eons ago. The implications of different ratios of Sr-87 and Sr-86 found in different components are discussed. Xe isotopic measurements show that Pu-244 was enriched in the whitlockite relative to the pyroxene by a factor of about 18. Chemical enrichment factors between the whitlockite and the fassaitic pyroxene in Angra dos Reis are presented
Publication Date: Jun 01, 1977
Document ID:
19770056177
(Acquired Dec 01, 1995)
Accession Number: 77A39029
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Journal Article
Publication Information: Earth and Planetary Science Letters; 35; 2, Ju; June 197
Publisher Information: Netherlands
Contract/Grant/Task Num: NSF PHY-76-02724; NGL-05-002-188
Financial Sponsor: NASA; United States
Organization Source: California Inst. of Tech.; Pasadena, CA, United States
Description: 23p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ABUNDANCE; ACHONDRITES; ISOTOPE SEPARATION; METEORITIC COMPOSITION; MINERALS; CHEMICAL ANALYSIS; MASS RATIOS; PLUTONIUM 244; PYROXENES; STRONTIUM ISOTOPES
Imprint And Other Notes: Earth and Planetary Science Letters, vol. 35, no. 2, June 1977, p. 294-316.
Miscellaneous Notes: p. 294-3
Availability Source: Other Sources
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