磐石地区粗榆—小铜矿一带金铜矿地质特征

The geologic features of Au, Cu deposit in the Cuyu-Xiaotongkuang, Panshi area, Jilin Province

粗榆—小铜矿地区属磐石—双阳接触带金及多金属成矿带的一部分,有良好的成矿地质环境,成矿物质来源于含金较高的石英闪长岩体和晚石炭纪石嘴子组地层等。热液矿化剂来源于岩浆分异晚期汽水热液和地表水的混合,北西向断裂构造及北东、东西向次级构造控制了地层岩浆岩的分布和矿化作用的演化,长期多期次的构造活动和脉岩的侵入使金铜等成矿元素活化富集,在有利的构造位置成矿。主要矿化类型有石英脉型和破碎带蚀变岩型。

Cuyu-Xiaotongkuang belongs to a part of Panshi-Shuangyang Au contact zone and polymetallic ore-forming belt, which has a favorable metallogenic geologic setting; metallogenic materials derived from quartz diorites with relative rich gold and the late Carboniferous Shizuizi Formation strata etc; the mineralized hydrothermal solution was derived from the gas water hydrothermal solution by the late magmatic differentiation as well as mixed ground water. The NW faulted structure and NE, EW secondary structure controlled the distribution of the magmatic rock and the evolution of the mineralizing process; the long, multiphase tectonic activities and the intrusion of the vein rock resulted in formation of Au, Cu in reactivation, enrichment and mineralization of other metallogenic elements in a favorable tectonic area. The main mineralized types are quartz vein type and alteration pattern with fracture zone.