贵州天柱大河边铅锌矿床的发现及其意义
The discovery of the Dahebian Pb-Zn deposit in Tianzhu area of Guizhou Province and its prospecting significance
查看参考文献16篇
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文摘
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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。 |
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其他语种文摘
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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 carbonaceous 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 hyalophane. 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 stable occurrence of this type of sulfide and barite mineralization along the Nanhua rift basin suggests that giant hydrothermal fluid exhalative event occurred during the early Cambrian period in this basin. The discovery of the Dahebian zinc-lead deposit has an important prospecting significance in this area. |
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来源
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地质通报
,2017,36(7):1288-1293 【核心库】
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关键词
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大河达铅锌矿床
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重晶石矿床
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南华裂谷盆地
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喷流沉积
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地址
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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
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贵州省地矿局101地质大队, 贵州, 凯里, 556000
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黔东南苗族侗族自治州国土资源局, 贵州, 凯里, 556000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1671-2552 |
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学科
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地质学 |
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基金
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国家973计划
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贵州省国土资源厅项目
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文献收藏号
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CSCD:6040810
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