Extinct 129I in halite from a primitive meteorite:: Evidence for evaporite formation in the early solar system

被引：60

作者：

Whitby, J ^{[1
]}

Burgess, R

Turner, G

Gilmour, J

Bridges, J

机构：

[1] Univ Manchester, Dept Earth Sci, Manchester M13 9PL, Lancs, England

[2] Nat Hist Museum, Dept Mineral, London SW7 5BD, England

来源：

SCIENCE | 2000年 / 288卷 / 5472期

关键词：

D O I：

10.1126/science.288.5472.1819

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Halite crystals from the Zag H3-6 chondrite contain essentially pure (monoisotopic) xenon-129 (Xe-129) produced in the early history of the solar system by the decay of short-lived iodine-129 (I-129) (half-Life = 15.7 million years). Correlated release of Xe-129 and Xe-128, produced artificially from I-127 by neutron irradiation, corresponds to an initial (I-129/I-127) ratio of (1.35 +/- 0.05) x 10(-4), close to the most primitive early solar system value. If the Xe-129 was produced by in situ decay. then the halite formed from an aqueous fluid within 2 million years of the oldest known solar system minerals.

引用

页码：1819 / 1821

页数：3

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