Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China | |
Hanjie Wen; Jean Carignan | |
2011 | |
发表期刊 | Geochimica et Cosmochimica Acta |
卷号 | 75期号:6页码:1411-1427 |
摘要 | We analyzed the Se isotopic composition of black shales and related kerogen and sulfide fractions from the Zunyi Ni–Mo–Se deposit, the La’erma Se–Au deposit and the Yutangba Se deposit in southern China to constrain metal sources and accumulation processes, both subjects of disagreement in the scientific community. Se at the Zunyi Ni–Mo–Se polymetallic deposit displayed a restricted range of δ82Se values (−1.6‰ to 2.4‰ with a mean of 0.6‰) suggesting a major hydrothermal origin where aqueous Se was probably transported as H2Se, along with H2S, and precipitated directly as selenides or in sulfides. Se at the La’erma Se–Au deposit covers a larger range in δ82Se values (−3.8‰ to 5.4‰ with a mean of 0.3‰), suggesting Se redistribution following redox transformations, leading to kinetic isotopic fractionation. The largest Se isotopic variation so far in natural terrestrial samples was found in the Yutangba Se deposit, with δ82Se values varying from −12.77‰ to 4.93‰. On the basis of variations in Se isotopes in the deposit, along with other geological and geochemical evidence, the “redox model” (supergene alteration) explains the occurrence of native Se in the deposit. Overall, hydrothermal systems may be a potentially important Se source to form economic deposits in comparison to seawater sources. Significantly, our study indicates that either secondary hydrothermal or supergene alteration is a key factor in Se enrichment in black shales. Redistribution of Se, and probably other redox-sensitive metals like Mo, Cr and V, leads to isotopic fractionation which may be used to fingerprint such alteration/precipitation processes. |
关键词 | Selenium Isotopes Trace The Source Redox Processes Black Shale-hosted Se-rich Deposits |
收录类别 | SCI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/352002/4089 |
专题 | 矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文 矿床地球化学国家重点实验室 |
推荐引用方式 GB/T 7714 | Hanjie Wen,Jean Carignan. Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China[J]. Geochimica et Cosmochimica Acta,2011,75(6):1411-1427. |
APA | Hanjie Wen,&Jean Carignan.(2011).Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China.Geochimica et Cosmochimica Acta,75(6),1411-1427. |
MLA | Hanjie Wen,et al."Selenium isotopes trace the source and redox processes in the black shale-hosted Se-rich deposits in China".Geochimica et Cosmochimica Acta 75.6(2011):1411-1427. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
Selenium isotopes tr(1693KB) | 开放获取 | 使用许可 | 浏览 请求全文 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Hanjie Wen]的文章 |
[Jean Carignan]的文章 |
百度学术 |
百度学术中相似的文章 |
[Hanjie Wen]的文章 |
[Jean Carignan]的文章 |
必应学术 |
必应学术中相似的文章 |
[Hanjie Wen]的文章 |
[Jean Carignan]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论