| 广西东平地区碳酸锰矿床Ga含量高异常的发现及成因初探 |
| Received:March 08, 2016 Revised:October 30, 2016 点此下载全文 |
| 引用本文：LI QiLai,YI HaiSheng,WU ChiHua,ZHAO XiangLing,XIA GuoQing.2017.Discovery of Ga with unusually high content in manganese carbonate deposits of Beisi Formation in Dongping area, Guangxi, and its genetic study[J].Mineral Deposits,36(3):544~556 |
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| Author Name | Affiliation | E-mail | | LI QiLai | Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China | | | YI HaiSheng | Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China
State Key Laboratory of Oil/Gas Reservoir Geology and Exploration, Chengdu University of Technology, Chengdu 610059, Sichuan, China | yhs@cdut.edu.cn | | WU ChiHua | Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China | | | ZHAO XiangLing | College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, Sichuan, China | | | XIA GuoQing | Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China | |
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| 基金项目:本文得到国家科技支撑计划专题项目（编号：2011BAB04B10-2）资助 |
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| 中文摘要:Ga是一种典型的稀有分散元素，主要产于铝土矿、闪锌矿及煤矿之中。最近，在广西东平地区下三叠统北泗组碳酸锰矿床中发现Ga高异常含量，w（Ga）介于5.16×10-6~82.80×10-6之间，平均为33.76×10-6，达到了Ga工业品位标准；锰矿层和围岩中w（Ga）平均分别为46.40×10-6、19.31×10-6，高于国内外已报道的大部分锰矿床。文中根据北泗组碳酸锰矿床地球化学特征，揭示了该锰矿床为热水沉积；同时，结合现代大洋铁锰沉积有关Ga的最新报道，提出北泗组碳酸锰矿床中Ga的赋存与含锰矿物密切相关，其来源与海底热液活动有关。最后，文中还利用Mn/Fe-Ga、Co-Ga关系图判别了古代铁锰沉积的成因类型。 |
| 中文关键词:地球化学 北泗组 Ga异常 热水沉积 成因探讨 锰矿床 广西 |
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| Discovery of Ga with unusually high content in manganese carbonate deposits of Beisi Formation in Dongping area, Guangxi, and its genetic study |
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| Abstract:Gallium(Ga)is a typical kind of dispersed element extracted from bauxite, sphalerite and coal. Recently, an unusually high content of Ga was discovered in manganese carbonate deposits of the Beisi Formation in Dongping area, Guangxi. The content of Ga is between 5.16×10-6 and 82.80×10-6, and the average content is 33.76×10-6, reaching the industrial grade of Ga. What's more, the average content of Ga in manganese ore beds and surrounding rocks is respectively 46.40×10-6 and 19.31×10-6, higher than values in most reported manganese ore deposits both in China and abroad. Geochemistry suggests that the manganese carbonate deposits belong to hydrothermal sedimentary genesis. Combined with the latest report about Ga in ferromanganese deposits from the ocean, it is held that the occurrence of Ga was closely associated with manganese-bearing minerals and the source of Ga was related to seafloor hydrothermal activity. Finally, the genetic types of manganese ore deposits were determined by Mn/Fe-Ga and Co-Ga logarithmic coordinate crossplots. |
| keywords:geochemistry Beisi Formation Ga anomaly hydrothermal sediments genetic study manganese ore deposit Guangxi |
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