Volcanic gases, black smokers, and the Great Oxidation Event
Volcanic gases, black smokers, and the Great Oxidation Event
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DOI：
10.1016/s0016-7037(02)00950-x
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发表时间：
2002-11-01
影响因子：
5
通讯作者：
Holland, HD
中科院分区：
文献类型：
--
作者：
Holland, HD
本文提出大气-海洋系统中挥发分组成的逐渐变化是造成大氧化事件(G.O.E.)的原因。约2.3乔治亚州在约2.3Ga之前，这些挥发分的组成可能是这样的：20%的碳气可以还原为有机质，所有的硫气都可以还原为黄铁矿。从2.3Ga开始，这些挥发分的组成可以使20%的碳气还原成有机质，但只有一小部分硫气可以还原成黄铁矿。这一变化导致大气的氧化和海水中SO4-2浓度的大幅增加。大量的观测数据支持这些建议。版权所有(C)2002爱思唯尔科学有限公司。
This paper proposes that gradual changes in the composition of volatiles that have been added to the atmosphere-ocean system are responsible for the Great Oxidation Event (G.O.E.) ca. 2.3 Ga. Before ca. 2.3 Ga, the composition of these volatiles was probably such that 20% of the carbon gases could be reduced to organic matter and all of the sulfur gases could be reduced to pyrite. Since 2.3 Ga, the composition of these volatiles has been such that 20% of the carbon gases could be reduced to organic matter, but only a fraction of the sulfur gases could be reduced to pyrite. This change led to the oxygenation of the atmosphere and to a large increase in the SO4-2 concentration of seawater. A considerable body of observational data supports these proposals. Copyright (C) 2002 Elsevier Science Ltd.