| 大湖塘钨矿区岩浆岩黑云母的成分特征及其成矿指示意义 |
| Received:May 20, 2018 Revised:October 10, 2018 点此下载全文 |
| 引用本文：JIANG Hua,ZHANG DaYu,ZHOU TaoFa,CHEN XueFeng,YE LongXiang,YU ZhenDong,XIANG XinKui.2018.Geochemical characteristics of biotite from igneous rocks in Dahutang tungsten ore district and its implications[J].Mineral Deposits,37(6):1147~1167 |
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| Author Name | Affiliation | E-mail | | JIANG Hua | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, Anhui, China | | | ZHANG DaYu | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, Anhui, China | dayuzhang@hfut.edu.cn | | ZHOU TaoFa | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, Anhui, China | | | CHEN XueFeng | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, Anhui, China | | | YE LongXiang | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
Anhui Province Engineering Research Center for Mineral Resources and Mine Environments, Hefei 230009, Anhui, China | | | YU ZhenDong | No.916 Geological Party, Jiangxi Bureau of Geology & Mineral Exploration, Jiujiang 332100, Jiangxi, China | | | XIANG XinKui | No.916 Geological Party, Jiangxi Bureau of Geology & Mineral Exploration, Jiujiang 332100, Jiangxi, China | |
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| 基金项目:科技部深地资源勘查开采专项（编号：2016YFC0600206）、国家自然科学基金项目（41302050、41341390441）和中央高校基本科研业务费专项（编号：JZ2016HGTB0730）联合资助 |
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| 中文摘要:大湖塘钨矿床是赣北地区近年来发现的超大型钨-多金属矿床，矿区内岩浆岩十分发育，且均含黑云母。按照黑云母的产出特征，大湖塘矿区岩浆黑云母可分为晋宁期花岗闪长岩中黑云母（类型一）、燕山期似斑状花岗岩中黑云母（类型二）、燕山期细粒花岗岩中黑云母（类型三）3种类型。对3类黑云母的电子探针和LA-ICPMS分析结果显示，3类黑云母属于铁云母到铁叶云母，富F贫Cl，富集大离子亲石元素Rb、Ba、K和高场强元素Ta、Nb、Ti等。综合对比显示，与钨成矿相关的燕山期似斑状花岗岩中的黑云母（类型二）具有较低的XMg值和Fe3+/Fe2+值、较高的Cl含量、∑REE浓度和LREE/HREE值，可作为含钨岩浆岩的成矿专属性指标。 |
| 中文关键词:地球化学 黑云母 LA-ICP-MS矿物原位分析 EMPA 大湖塘钨矿 江南古陆 |
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| Geochemical characteristics of biotite from igneous rocks in Dahutang tungsten ore district and its implications |
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| Abstract:The Dahutang tungsten deposit is a superlarge tungsten-polymetallic deposit recently discovered in northern Jiangxi Province. There are widely developed multi-type granitoid intrusions, which are consistently rich in biotite. On the basis of their geological occurrences, the biotites in the Dahutang mining area can be divided into three types:biotite in the Jingingian granodiorite (type 1), biotite in the Yanshanian porphyritic granite (type 2) and biotite in the Yanshanian fine-grained granite (type 3). Electron microprobe and LA-ICP-MS analyses on three types of biotite show that they have high F but low Cl concentrations, and belong to annite and siderophyllite. They are enriched in Rb, Ba, K and depleted in Ta, Nb, Ti. Based on comparative study, the authors detect that biotite (type 2) from the Yanshanian porphyritic granite (W-mineralized) has lower XMg and Fe3+/Fe2+ ratios, highest Cl and ∑REE concentrations and LREE/HREE ratios,which are probably efficient indicators of the W-bearing granitoids. |
| keywords:geochemistry biotite LA-ICPMS in-situ mineral analysis EMPA Dahutang tungsten deposit Jiangnan terrane |
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