| 构造应力场转换与界面成矿 |
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| 关键词:tectonic physicochemicity field tectonic deformation lithofacies transformation of tectonic stress field structure fluid motion by stages interfacial metallogensis |
| 基金项目:国家计委国土司科技找矿项目,国家科技攀登项目,地矿部“九五”重点基础项目 |
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| 摘要: |
| The Transformation of Tectonic Stress Field and Interfacial Metallogensis |
| The transformation of stress field and interfacial metallogensis is the key and core of dynamics of metallization.Espically,it determines forming and distribution of ore deposits.It displays tectonic overprinting and transformation of dultile brittle among different tectonic levels,and more importantly,in the same tectonic level,it displays stress transformation among different periods and positions. Oreforming interfaces are the space and places of sudden change of physicochemicity condition,and the spots of precipitating,accumulating and metallizating.They display salation of lithology, t,p ,pH, E h,and so on.Its mechanic characters and rocks physical,chemical characters are important facters that control the shape,attitude,scale and ore fabric,even ore component,which has relationship with the tectonic stress,especially with tectonic fluid motion by stages.The transformation of stress field leads to textural variance of tectonic physicochemicity field and forms different interfaces. On the condition,all kinds of alteration and metallization can emerge. Based on results of detailed mapping of tectonic deformation lithofacies, the authors found the structure of ore vein,ore body and alteration belts mainly show strain shear deformation,and ore structure is mainly tension fissure, then the paper discusses the law of tectonic fluid motion by stages and interfacial metallogenism. At the end of the paper,authors put forward a new thought that metallogensis of metallic sulphide occurred on the interface which shear-strain deformed structural lithofacies transformed to shear tension deformed structural lithofacies. |
| DENG Jun,LÜ Gu-xian,YANG Li-qiang,GUO Tao,FANG Yun,SHU Bin.1998.The Transformation of Tectonic Stress Field and Interfacial Metallogensis[J].Acta Geoscientica Sinica,19(3):244-250. |
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