Deuterium enrichments in chondritic macromolecular material-Implications for the origin and evolution of organics, water and asteroids
Deuterium enrichments in chondritic macromolecular material-Implications for the origin and evolution of organics, water and asteroids
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DOI：
10.1016/j.gca.2010.05.005
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发表时间：
2010-08-01
影响因子：
5
通讯作者：
Cody, G. D.
中科院分区：
文献类型：
--
作者：
Alexander, C. M. O'D.;Newsome, S. D.;Cody, G. D.
在这里，我们报告了从几个以前未分析的陨石中分离出的不溶性有机物质（TOM）的元素和同位素组成，以及对一些以前测量的样品的H同位素组成的重新分析（亚历山大等人，2007年）。普通碳酸盐岩（OC）中的IOM具有非常大的D富集，其随着变质作用的增加和H/C的降低而增加，测得的最极端的Δ D值几乎为12，000 ppm。我们认为，这种大的同位素分馏可以产生在OC母体通过损失同位素非常轻112产生时，铁被水氧化在低温下（
Here we report the elemental and isotopic compositions of the insoluble organic material (TOM) isolated from several previously unanalyzed meteorites, as well as the reanalyses of H isotopic compositions of some previously measured samples (Alexander et al., 2007). The IOM in ordinary chondrites (OCs) has very large D enrichments that increase with increasing metamorphism and decreasing H/C, the most extreme delta D value measured being almost 12,000 parts per thousand. We propose that such large isotopic fractionations could be produced in the OC parent bodies through the loss of isotopically very light 112 generated when Fe was oxidized by water at low temperatures (