Anomalous fractionations of sulfur isotopes during thermochemical sulfate reduction

Yumiko Watanabe, James Farquhar, Hiroshi Ohmoto

研究成果: Article査読

115 被引用数 (Scopus)

抄録

Anomalously fractionated sulfur isotopes in many sedimentary rocks older than 2.4 billion years have been widely believed to be the products of ultraviolet photolysis of volcanic sulfur dioxide in an anoxic atmosphere. Our laboratory experiments have revealed that reduced-sulfur species produced by reactions between powders of amino acids and sulfate at 150° to 200°C possess anomalously fractionated sulfur isotopes: Δ33 = +0.1 to +2.1 per mil and Δ36 = -1.1 to +1.1 per mil. These results suggest that reactions between organic matter in sediments and sulfate-rich hydrothermal solutions may have produced anomalous sulfur isotope signatures in some sedimentary rocks. If so, the sulfur isotope record of sedimentary rocks may be linked to the biological and thermal evolution of Earth in ways different than previously thought.

本文言語English
ページ(範囲)370-373
ページ数4
ジャーナルScience
324
5925
DOI
出版ステータスPublished - 2009 4 17
外部発表はい

ASJC Scopus subject areas

  • 一般

フィンガープリント

「Anomalous fractionations of sulfur isotopes during thermochemical sulfate reduction」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル