投稿时间：2018-05-20
修订日期：2018-10-10
网络发布日期：2019-01-09
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。
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
文章编号：
中图分类号：P618.51
文献标志码：
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
引用文本：
蒋华,张达玉,周涛发,陈雪锋,叶龙翔,余振东,项新葵.2018.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[J].矿床地质,37(6):1147~1167JIANG 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 Deposits37(6):1147~1167
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