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DOI | 10.1073/pnas.1620977114 |
Recombination reactions as a possible mechanism of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth | |
Babikov, Dmitri | |
2017-03-21 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2017 |
卷号 | 114期号:12页码:3062-3067 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | A hierarchy of isotopically substituted recombination reactions is formulated for production of sulfur allotropes in the anoxic atmosphere of Archean Earth. The corresponding system of kinetics equations is solved analytically to obtain concise expressions for isotopic enrichments, with focus on massindependent isotope effects due to symmetry, ignoring smaller mass-dependent effects. Proper inclusion of atom-exchange processes is shown to be important. This model predicts significant and equal depletions driven by reaction stoichiometry for all rare isotopes: S-33, S-34, and S-36. Interestingly, the ratio of capital. values obtained within this model for S-33 and S-36 is -1.16, very close to the mass-independent fractionation line of the Archean rock record. This model may finally offer a mechanistic explanation for the striking mass-independent fractionation of sulfur isotopes that took place in the Archean atmosphere of Earth. |
英文关键词 | S-MIF mass-independent fractionation Archean atmosphere sulfur recombination isotope effect |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396893600050 |
WOS关键词 | AB-INITIO ; OZONE FORMATION ; SO2 PHOTOLYSIS ; SOLID SULFUR ; TETRASULFUR ; ORIGIN ; EVOLUTION ; SPECTRA ; OXYGEN ; S-4 |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204681 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | Marquette Univ, Dept Chem, Milwaukee, WI 53021 USA |
推荐引用方式 GB/T 7714 | Babikov, Dmitri. Recombination reactions as a possible mechanism of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(12):3062-3067. |
APA | Babikov, Dmitri.(2017).Recombination reactions as a possible mechanism of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(12),3062-3067. |
MLA | Babikov, Dmitri."Recombination reactions as a possible mechanism of mass-independent fractionation of sulfur isotopes in the Archean atmosphere of Earth".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.12(2017):3062-3067. |
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