Abstracts of Annual Meeting of the Geochemical Society of Japan
52th Annual Meeting of the Geochemical Society of Japan
Session ID : 1D08
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Host: The Geochemical Society of Japan

Co-host: The Chemical Society of Japan

extraterrestrial materials
Geochronological study of Allende Meteorite
*Katsuyuki Yamashita, Noboru Nakamura, Heaman Larry
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Keywords: Pb isotope, geochronology, Allende Meteorite
CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract
U-Pb systematics of CAI and chondrules from Allende (CV3) meteorite has been investigated. By achieving a total Pb procedural blank of 1 to 2 picogram level, we were able to precisely determine the absolute age of CAI and chondrules. In this presentation, we will present our newest results on the age of Allende CAI and chondrules that were treated with dilute acid in order to remove the common Pb from the matrix.
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© 2005 by The Geochemical Society of Japan
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