| 中国科学院地球化学研究所 |
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| 引用本文：.1987.A Discussion On Formation Mechanism Of Stratabound Ore Deposits In China-A Fluid Inclusion Approach[J].Mineral Deposits,6(2):16~28 |
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| 中文摘要:本文通过流体包裹体研究，结合沉积改造层控矿床的基本地质特征，从物质来源、成矿流体的迁移富集和成矿作用的物理化学条件三个方面探讨了我国沉积改造层控矿床的形成机理。 |
| 中文关键词:沉积改造层控矿床 流体包裹体 物质来源 成矿流体 成矿作用 |
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| A Discussion On Formation Mechanism Of Stratabound Ore Deposits In China-A Fluid Inclusion Approach |
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| Abstract:Based on geological characteristics of sedimentary-transformed stratabound deposits in China, the authors have made a fluid inclusion research to approach the formation mechanism of that sort of deposits in the light of their material sources, migration of ore-forming fluids and physical-chemical condition for mineralization. The investigation shows that the ore-forming fluids, a special kind of H2O, were originally heated meteoric waters which reacted with wall rocks and dissolved such components as Na+, Ca2+, K+, C1-, HCO3- and Mg2+. The metallogenic elements, other components of ore fluids and sulfur were mainly derived from the wall rocks. The ore fluids are of Na-Ca-C1-HCO3 system with the salinity from 4 to 14 wt.% NaCl equivalent and density from 0.9 to 1.0 g/cm3. At the temperature of 150~250℃ and under the pressure of 300 to 800 bars, possibly with the participation of bacteria or organic matter, there were formed various sedimentary-transformed stratabound deposits as they appear now. |
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