内蒙撰山子金矿流体包裹体特征和成矿物理化学条件探讨

The Investigation of Fluid Inclusion Features and Ore-forming Physical-chemical Condition in Zhuanshanzi Gold Deposit

为了探讨撰山子金矿成矿物理化学条件,现场共采集了9个含矿石英标本。通过对其石英流体包裹体类型、包裹体的成分特征的研究及计算,得出金矿床成矿温度主要在170-220℃和230-300℃这两个区间,应属中温热液矿床;成矿压力为51.12-72.6 MPa;成矿深度为1.7-2.4 km,反映了中浅成的成矿特征。含矿流体具中低温,弱酸—弱碱性的特点,还原性较弱。

In order to explore the ore-forming physical-chemical condition of Zhuanshanzi gold deposit, nine ore samples containing quartz were collected in field. Based on the study of the types and calculation of the component characteristics of the fluid inclusion in quartz, it is found that the ore-forming temperature of gold deposit is mainly at the two temperature zone. 170～220℃ and 230～300 ℃. The result shows that this deposit belongs to mesothermal type. The mineralization pressure is 51.12～72.6 MPa,and the mineralization depth is 1.7～2.4 km,which reflecting the mineralization characteristic of middle-shallow layer. Fluid inclusions have the features of middle-shallow temperature, weak acid-alkcali,and weak reducibility.