摘要
璜山韧性剪切带是绍兴-江山断裂带的一个组成部分,构造应变场为不均匀简单剪切应变场。剪切滑动方向为斜向逆冲性质,总位移量达42km。金矿化产于剪切带中部(但并非剪切应变最强烈地段)糜棱岩内的石英脉中,矿床成因为混合岩化-重熔岩浆热液型,剪切构造运动产生的动力分异作用也可能是成矿作用因素之一。识别韧性剪切带,寻找断裂带内的古老变质岩系和糜棱岩带、蚀变带与黄铁矿富集带的叠加地段是重要找矿标志。
The Huangshan ductile shear zone is a part of the Shaoxing-Jiangshan fault zone with features of a heterogenous and simple structural strain field. The shear slide sense is of oblique- orientation and thrusting nature with the total displacement of 40km. The gold mineralization is located in quartz veins in mylonite in the middle part of the shear zone (not in the most intense part of shear strain).The genesis of the deposit is considered to be migmatization- anatexis hydrothermal. The dynamic differentiation caused by shear-tectonic movement is possibly one of the factors for metallogenesis. Identifying ductile shear zone, superimposition sectors of altered zone and pyrite-concentrated zone on old metamorphic rock series and mylonites in fault zones are important prospecting guides for gold deposits.
出处
《铀矿地质》
CSCD
北大核心
1991年第1期16-23,共8页
Uranium Geology
关键词
韧性
剪切带
金矿
成矿作用
璜山
Ductile shear zone
Gold mineralization
Structural feature
