【摘要】 陕西凤县八方山铜铅锌多金属矿床为一层控矿床,其后生热液改造富集作用主要受构造控制.区内主体构造为一短轴背科,产于背斜中的环状层滑断层严格控制了矿体的展布.应用构造解析、有限应变分析、显微组构分析等方法对该背斜及其次级构造进行研究,结果表明该区构造为多期变形(至少二级韧性变形和二期脆性变形)的产物,矿化富集受前三期变形控矿.更多还原

【Abstract】 Bafangshan copper-lead-zinc polymetallic deposit in Feng county, Shaanxi province is a stratabound deposit which reformation and enrichment of hystcrogcnic hydrothermal fluid was mainly controlled by tectonic structure. The major structure in the region is a brachy anticline, in which the circular bedding slip faults strictly controlled the localization of the orebodies. The anticline and its secondary structure have been studied by using several methods, such as tectonic analysis, finite strain analysis, microscopic fabric analysis. It is concluded that the tectonic structures in the region were resulted from multiperiodic deformation (at least two levels ductile and two period’s brittle deformation) with mineralization controlled by earlier three periods of deformation.更多还原