| 赵爽,潘文,杨胜堂,尹廷龙,蒋天锐,田景江,陈玲,覃智贵.湘西—黔东北地区下寒武统铅锌矿矿床地质特征及成因探讨[J].贵州地质,2016,33(4):257-264 |
| 湘西—黔东北地区下寒武统铅锌矿矿床地质特征及成因探讨 |
| Geological Characteristics and Genesis of Lead-Zinc Deposits by Lower Cambrian in Western Hunan-Northeastern Guizhou Area |
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| 中文关键词: 湘西—黔东北 下寒武统 铅锌矿 礁滩相 构造控矿 成矿过程 |
| 英文关键词:Western Hunan-northeastern Guizhou area Lower Cambrian Lead-zinc deposits Reef-bank facies Structure ore-control Metallogenic process |
| 基金项目:贵州省地质矿产勘查开发局地质科学研究项目《湘西—黔东北地区铅锌矿床成矿机制研究》（编号：黔地矿科合[2015]02号）资助。 |
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| 中文摘要: |
| 湘西—黔东北地区下寒武统铅锌矿严格赋存于台地边缘礁滩相产出的藻礁灰岩中，其实质属断裂构造控矿，具有MVT型矿床的典型特征。成矿时代可能为晚志留世至早石炭世。（中）低温度、中高盐度流体从上地壳岩石地层中浸出铅锌，顺断裂通道运移至碳酸盐岩围岩中，围岩受水岩反应和交换作用释放的海水硫酸盐经热化学还原作用转化为还原硫，还原硫与铅锌金属络合物相结合而成矿。该类成矿过程中受区域挤压应力影响的断裂构造始终起到至关重要的作用。 |
| 英文摘要: |
| The lead-zinc deposits by Lower Cambrian in western Hunan-northeastern Guizhou area are hosted in algal reef limestone in the platform margin reef flat facies. In fact, it belongs to the fault structure ore-control, and has the typical characteristics of Mississippi Valley-tpye lead-zine deposits. The metallogenic epoch may be from the Late Silurian to the Early Carboniferous. Fistly, Pb Zn are leached from the upper crust by middle/low temperature, high salinity fluid, secondly, this fluid migrates to the surrounding rocks consisting of carbonate rocks along the fault path, then, the sulphate that are from the surrounding rocks through water-rock reaction or exchange between it and the metallogenic fluid are trasformed into the reduced sulfur by Thermochemical Sulfate Reduction(TSR), lastly, these deposits were formed by combineing the reduced sulfur and Pb Zn metal complex. The fault structure affected by the regional extrusion stress were played a crucial role throughout this metallogenic process. |
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