| 川西北马脑壳金矿床流体相分离作用及其成矿意义 |
| 修订日期：2000-11-03 |
| 关键词:fluid phase separation process micro-grained disseminated gold deposit altered rock type mineralization quartz vein type mineralization northwestern Sichuan |
| 基金项目:国土资源部“九五”重点科技攻关项目(9502002)部分研究成果 |
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| 摘要: |
| Phase Separation of Fluids in the Manaoke Gold Deposit of Northwestern Sichuan and Its Mineralization Significance |
| The Manaoke gold deposit is a large micro-grained disseminated type deposit found recently in northwestern Sichuan. It is located in Middle Triassic Zageshan Formation, with slates, sandstones and limestones as its main lithologic association. The ore belt is strictly controlled by a NW-striking second-order fault. The mineralization of the deposit can be classified into two types, viz. altered rock type and quartz vein type. The former type is of quartz-arsenopyrite-pyrite-native gold ore formation and is developed along the rock beds, whereas the latter type is of quartz-(scheelite)-stibnite-native gold ore formation and occurs crosscutting the rock beds. A systematic study on fluid inclusions shows that phase separation process happened in the ore-forming solutions at the quartz-(scheelite)-stibnite vein type gold mineralization stage. The paper has discussed the mechanism of gold deposition as the result of fluid phase separation process, and put forward the new view that the fluid phase separation process played an important role in the formation of industrial ore shoots during the formation of micro-grained disseminated gold deposits. |
| WANG Ke-yong,YAO Shu-zhen,LV Xin-biao.2001.Phase Separation of Fluids in the Manaoke Gold Deposit of Northwestern Sichuan and Its Mineralization Significance[J].Acta Geoscientica Sinica,22(1):35-38. |
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