金刚石中包裹体的质量无关硫与早期地球的硫循环

Mass-independent sulfur of inclusions in diamond and sulfur recycling on early Earth.

作者信息

Farquhar J, Wing B A, McKeegan K D, Harris J W, Cartigny P, Thiemens M H

机构信息

Earth System Science Interdisciplinary Center and Department of Geology, University of Maryland, College Park, MD 20742, USA.

出版信息

Science. 2002 Dec 20;298(5602):2369-72. doi: 10.1126/science.1078617.

DOI:10.1126/science.1078617

PMID:12493909

Abstract

Populations of sulfide inclusions in diamonds from the Orapa kimberlite pipe in the Kaapvaal-Zimbabwe craton, Botswana, preserve mass-independent sulfur isotope fractionations. The data indicate that material was transferred from the atmosphere to the mantle in the Archean. The data also imply that sulfur is not well mixed in the diamond source regions, allowing for reconstruction of the Archean sulfur cycle and possibly offering insight into the nature of mantle convection through time.

摘要

博茨瓦纳卡普瓦尔-津巴布韦克拉通奥rapa金伯利岩筒钻石中的硫化物包裹体群体保留了质量无关的硫同位素分馏。数据表明，太古代时物质从大气转移到了地幔。数据还表明，硫在钻石源区混合不充分，这有助于重建太古代硫循环，并可能为洞察地幔随时间的对流性质提供线索。