滇西兰坪盆地白秧坪地区东矿带推覆构造的控矿作用

云南白秧坪地区东矿带的推覆构造为与金沙江—哀牢山造山带有关的前陆盆地逆冲推覆构造系统的前锋,属叠瓦扇式显露类前锋,矿区内主要由华昌山断裂和水磨房断裂构成推覆前锋的冲起构造。华昌山断裂和水磨房断裂既是本区的主要导矿构造,也是主要的容矿构造,深部循环的热卤水溶液以此为通道上升,而后成矿定位于其内和其上盘不同级别的次级断层或层间破碎带中。在华昌山断裂带内,成矿元素的含量变化与不同的构造岩石类型有一定的关系。

ORE-CONTROLLING EFFECT OF NAPPE STRUCTURE IN THE EAST ORE ZONE OF THE BAIYANGPING AREA, LANPING BASIN, YUNNAN

The nappe structure in the east ore zone of the Baiyangping area,Yunnan,is a front of the thrust nappe system of a foreland basin related to the Jinshajiang-Ailaoshan orogenic belt,belonging to the emergent imbricate fan-type front.In the mining area the Huachangshan fault and Shuimofang fault form the pop-up structure of the nappe front.The two faults are not only the main ore-conducting structure but also the main ore-hosting structure.The hot brine that circulated at depths rose along the faults and then filled in their secondary faults or interstratal fractured zones inside the thrust faults and in their hanging walls.In the Huachangshan fault zone,the change of ore-forming element contents has certain relation to different types of structural rock.