| 粤北层控铅-锌-硫矿床成矿机理及控矿地质因素 |
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| 引用本文：.1994.Metallogenic mechanism and ore-control geological factors of the stratabound lead,zinc and sulfur deposits in northern Guangdong[J].Mineral Deposits,13(2):118~125 |
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| 中文摘要:粤北层控铅-锌-硫矿床产于晚古生代沉积盆地边缘的碳酸盐岩中，是沉积盆地自身发展演化中的产物。含矿热液主要是沉积盆地下部的泥质岩层在后生演化阶段发生压挤脱水作用形成的，金属硫化物是从盆地中心向上运移的含矿热液与碳酸盐岩中富含H2S气体的地下水混合而结晶沉淀的，成矿主要受沉积盆地建造、盆地边缘或古岛古隆起、构造、沉积相和白云岩化五个因素控制。 |
| 中文关键词:成矿机理 沉积盆地压挤脱水作用 控矿地质因素 层控铅-锌-硫矿床 粤北 |
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| Metallogenic mechanism and ore-control geological factors of the stratabound lead,zinc and sulfur deposits in northern Guangdong |
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| Abstract:The stratabound lead, zinc and sulfur deposits in northern Guangdong occur in Middle-Upper Devonian and Lower Carboniferous carbonate rocks on the margin of the late Paleozoic sedimentary basin, being products of diagenetic-epigenetic evolution of the sedimentary basin. The ore-bearing thermal brine was mainly formed through the squeezing and dewatering process of argillaceous strata in the lower part of the basin at the epigenetie stage. The dewatering process means the release of interlayer water of clay minerals at rather great buried depth(>3～4 km)and fairly high tempera ture(>90～100℃). Metal sulfides precipitated in carbonate accumulations when the thermal brine that migrated upwards from the depth of the basin with high pressure to its margin with low pressure mixed with H2S-rich groundwater or replaced pyrite, with the H2S derived from the reduction of sulfates by bacteria and organism and the pyrite formed at the sedimentary and diagenetic stage. The formation of ore deposits was controlled by five factors, i. e., sedimentary formation of the basin，margin of the basin, paleoisland or paleoupheaval, structure, sedimentary facies and dolomitization. |
| keywords:metallogenic mechanism, ore-control geological factor, squeezing and dewatering process of the sedimentary basin, stratabound lead, zinc and sulfur deposits, northern Guangdong |
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