小孤山铅锌多金属矿集区成矿地质特征以及成矿规律研究

Study on metallogenic geological characteristics and metallogenic regularity of lead-zinc polymetallic deposit in Xiaogushan

本文根据唐望山印支期花岗岩体化学成分判断,Pb、Au丰度低于辽河群地层,岩体侵入同化围岩在岩体边部分异,随着岩体分异形成含矿热液,断裂构造为含矿热液的运移提供有利通道及储集空间,含矿热液沿断裂构造运移过程中,由于侵入晚期随着温度下降,动力变小,在有利岩性组合下,在有利的部位叠加富集成矿。

Based on the chemical composition of the Indosinian granite in the Tangwangshan Mountains,this paper judges that the abundance of Pb and Au is lower than that in the Liaohe Group.The intrusion of the rock mass into the assimilated surrounding rock is partially different from the rock mass.As the rock mass is differentiated,the hydrothermal fluid is formed The fault structure provides favorable channels and storage space for the migration of ore-containing hydrothermal fluid.During the movement of ore-containing hydrothermal fluid along the fault structure,due to the late invasion,the temperature decreases and the power decreases.Under the favorable lithological combination,Accumulate rich ore deposits at favorable locations.