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温汉捷,周正兵,刘灵,秦朝建,黄远成,文星桥,石庆鹏,徐东波,王文杰.贵州天柱大河边铅锌矿床的发现及其意义[J].地质通报,2017,(7):1288-1293.
贵州天柱大河边铅锌矿床的发现及其意义    点此下载全文
温汉捷1  2  周正兵1  2  刘灵3  秦朝建1  黄远成3  文星桥3  石庆鹏3  徐东波4  王文杰3
1. 中国科学院地球化学研究所矿床地球化学国家重点实验室, 贵州 贵阳 550002;
2. 中国科学院大学, 北京 100049;
3. 贵州省地矿局 101地质大队, 贵州 凯里 55600;
4. 黔东南苗族侗族自治州国土资源局, 贵州 凯里 556000
基金项目:国家科技部"973"计划项目《华南低温成矿作用》(编号:2014CB440904)和贵州省国土资源厅项目《天柱重晶石矿整装勘查整装勘查》(编号:GZ2-17)
DOI:
摘要:
      大河边重晶石矿床是一个世界级的超大型重晶石矿床。最近在该区重晶石矿床下部的震旦系陡山沱组碳酸盐岩(白云岩)和碎屑岩中,新发现一套规模较大、层位产出稳定的铅锌矿化。铅锌矿体和重晶石矿床具有"上部为重晶矿,下部为铅锌硫化物矿床"的矿化特征。铅锌矿段矿石矿物主要为闪锌矿、黄铁矿及方铅矿,含少量白铁矿、黄铜矿及磁黄铁矿;脉石矿物主要为石英和重晶石,少量白云石、热液磷灰石、炭沥青及钡冰长石。成矿流体特征类似于形成沉积喷流型铅锌矿床的流体特征。铅锌矿化中的硫源自局限海盆内早寒武世海水经硫酸盐还原作用提供。此种类似于喷流沉积型铅锌矿床在南华裂谷盆地一带矿化层位稳定、分布范围较广泛,体现早寒武世时在裂谷盆地内存在一次大规模的热液事件。天柱大河边铅锌矿床的发现具有重要的资源意义及区内该种矿床的勘查意义。
关键词:大河边铅锌矿床  重晶石矿床  南华裂谷盆地  喷流沉积
The discovery of the Dahebian PbZn deposit in Tianzhu area of Guizhou Province and its prospecting significance    Download Fulltext
WEN Hanjie1  2  ZHOU Zhengbing1  2  LIU Ling3  QIN Chaojian1  HUANG Yuancheng3  WEN Xingqiao3  SHI Qingpeng3  XU Dongbo4  WANG Wenjie3
1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, Guizhou, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. No. 101 Geological Party, Bureau of Geology and Mineral Exploration and Development of Guizhou Province, Kaili 556000, Guizhou, China;
4. Bureau of Land and Resources, Kaili 556000, Guizhou, China
Fund Project:
Abstract:
      The Dahebian barite deposit is a world-class superlarge barite deposit. Beneath this deposit, a new zinc-lead deposit was discovered. Sulfide ores are mainly discordant but stratabound in the Doushantuo Formation that consists of micrite dolomite and car-bonaceous mudstone. This type of zinc-lead mineralization has a close spatial relationship with the stratiform barite mineralization. The sulfide ores primarily contain sphalerite, pyrite and galena, with minor amounts of marcasite, chalcopyrite and pyrrhotite. The gangue minerals primarily consist of quartz, barite and minor calcite, bitumen and hydrothermal apatite, and trace amounts of hyalo-phane. Ore-forming fluids in this deposit are similar to fluids in the sedimentary exhalative zinc-lead deposit. The sulfur in the Dahebian zinc-lead deposit was derived from the Early Cambrian restricted seawater column through sulfate reduction processes. The sta-ble occurrence of this type of sulfide and barite mineralization along the Nanhua rift basin suggests that giant hydrothermal fluid exha-lative event occurred during the early Cambrian period in this basin. The discovery of the Dahebian zinc-lead deposit has an impor-tant prospecting significance in this area.
Keywords:Dahebian zinc-lead deposit  barite deposit  Nanhua rift basin  exhalative sedimentation
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