Mineral radioactivity in sands as a mechanism for fixation of organic carbon on the early Earth

被引：22
|
作者：
Parnell, J [1 ]
机构：
[1] Univ Aberdeen, Dept Geol & Petr Geol, Aberdeen AB24 3UE, Scotland
来源：
ORIGINS OF LIFE AND EVOLUTION OF THE BIOSPHERE | 2004年 / 34卷 / 06期
关键词：
early Earth; habitable zones; irradiation; monazite; polymerization; rocky planets;
D O I：
10.1023/B:ORIG.0000043132.23966.a1
中图分类号：
Q [生物科学];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Irradiation of organic molecules by mineral radioactivity is a feasible alternative to cosmic irradiation to precipitate solid organic carbon-rich matter on the early Earth. Radioactive (uranium- and thorium-rich) minerals have been concentrated at the Earth's surface, and accumulated accretionary coatings of carbon due to irradiation, since early Archean times. The organic accretion process could have occurred at the surface or in the sub-surface, and is independent of a terrestrial or extraterrestrial source for the carbon.
引用
收藏
页码：533 / 547
页数：15
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