| 气化-热液矿床的侧向分带及其成因机制 |
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| 引用本文：.1992.Lateral Zoning Of Pneumatolytic-Hydrothermal Deposits And Mechanism Of Its Formation[J].Mineral Deposits,11(4):291~300 |
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| 基金项目:国家自然科学基金资助项目 |
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| 中文摘要:通过对个旧锡多金属、银山贵金属-多金属，冷水坑银-多金属和东坡钨-锡-多金属矿田的研究，揭示了从下行板块、板片和下盘的不同深度衍生出来的不同的成矿流体，沿着它们上升的通道，在化学、温度和压力上发生有规律的变化，结果导致不同矿物或矿石建造在花岗岩类和有关的主干断裂之间沉淀，并形成侧向分布和侧向分带。 |
| 中文关键词:侧向分布 侧向分带 成矿物质来源 A-型俯冲 B-型俯冲 |
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| Lateral Zoning Of Pneumatolytic-Hydrothermal Deposits And Mechanism Of Its Formation |
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| Abstract:It has been traditionally considered that primary zoning in hydrothermal deposits resulted from differences in such aspects as distance from the intrusive, physicochemical conditions (temperature，pressure and composition of the solution), and mobility of ore-forming elements or stability of their minerals, with ore materials derived from intrusives or their country rocks．The authors now Iook at this problem from a new different angle.
The authors emphasize the impoxtance of the intracontinental compression subduction (A-type subduction), downgoing decollements and downthrusts trending NE, NNE and E-W, dipping inland and parallel to the Benioff zones or collision zones in the formation and distribution of pneumatolytic-hydrothermal deposits in the active continental margin of East China. Based upon investigations into tectonic settings and lateral zoning of the Gejiu tin-polymetallic deposit, the Yinshan noble-polymetallic deposit, the Lengshuikeng silver-polymetallic deposit and the Dongpo tungsten-tin-polymetallic supergiant ore fields，the authors have revealed that different ore-forming fluids derived from downgoing plates，slabs and footwalls at different depths changed regularly in chemistry, temperature and pressure along their conduits, and this resulted in, the deposition of different minerals or ore formations between granitoids and related major faults and the formation of lateral distribution and zoning in pneumatolytic-hydrothermal deposits． |
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