新晃贡溪-天柱大河边重晶石矿床热水沉积成因探讨

北京大学学报（自然科学版）

新晃贡溪-天柱大河边重晶石矿床热水沉积成因探讨

吴朝东¹,杨承运¹, 陈其英²

¹北京大学地质系，北京，100871; ²中国科学院地质研究所，北京，100029

收稿日期:1998-07-07 出版日期:1999-11-20 发布日期:1999-11-20

The Hydrothermal Sedimentary Genesis of Barite Deposits in West Hunan and East Guizhou

WU Chaodong¹, YANG Chengyun¹,CHEN Qiying²

¹Department of Geology, Peking University, Beijing, 100871; ²Institute of Geology, Chinese Academy of Sciences, Beijing, 100029

Received:1998-07-07 Online:1999-11-20 Published:1999-11-20

摘要/Abstract

摘要： 综合分析了重晶石矿床的沉积学和地球化学特征，结果表明，在扬子大陆东南边缘由于早寒武世地壳的热点活动带来了丰富的成矿物质，形成了Si-P-Ba-多金属矿床谱系。下寒武统的黑色岩系形成于缺氧环境，但重晶石形成时期还原性相对较弱。重晶石矿石中有机质碳含量较低，具有原生残留有机质的明显特征。钡的来源为热液喷气作用，生物的发育为钡的转化和富集提供了条件，海水为重晶石的形成提供了充分的硫源，但由于生物的分馏作用较强，致使重晶石δ³⁴S值可达41.65‰。

关键词: 有机地球化学, 重晶石, 黑色岩系, 热液沉积

Abstract: The super hydrothermal barite deposits occur in west Hunan and east Guizhou. The paper mainly deal with the characteristics of the sedimentary and geochemistry of barite. The results show that the abundant resources are from the hot spots of the crust of the continental margin in early Cambrian, and deposited the Si-P-Ba-PGE series. The Cambrian black shales sediment in anoxia environment, but the degree of reducing was low. The content of organic matter in barite is small, but it is primary. Ba was from the hydrothermal gas and liquid, and the organisms transverse and enrich Ba, and S was from the seawater fractionated by the organisms, the δ³⁴S are as 4.165%.

Key words: organic geochemistry, barite, black shale series, hydrothermal sediment

中图分类号:

吴朝东,杨承运, 陈其英. 新晃贡溪-天柱大河边重晶石矿床热水沉积成因探讨[J]. 北京大学学报（自然科学版）.

WU Chaodong,YANG Chengyun,CHEN Qiying. The Hydrothermal Sedimentary Genesis of Barite Deposits in West Hunan and East Guizhou[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

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https://xbna.pku.edu.cn/CN/Y1999/V35/I6/774

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