吉林省洮南市聚宝铜矿床的地质特征、流体包裹体研究

吉林省洮南市聚宝铜矿床位于布敦花-长春岭构造成矿带上。矿区发现3个矿脉组，蚀变闪长玢岩和近南北向的断裂控制铜矿产出与分布。矿石矿物主要为黄铜矿、黄铁矿和辉铜矿，伴生金银。矿石以交代溶蚀结构和脉状、浸染状构造为特征。该矿床划分为4个成矿阶段：黄铁矿阶段、黄铜矿阶段、多金属阶段和碳酸盐阶段。流体包裹体研究表明，该矿床流体包裹体由气液两相和含子矿物三相包裹体组成。气液两相包裹体大小为6~8 μm，气液比为10%~20%，均一温度为163.8~364.0 ℃，多数为180~240 ℃，盐度（w(NaCl)）为1.05%~10.62%；含子矿物三相包裹体大小为5~10 μm，气液比为3%~6%，均一温度为270~367 ℃，w(NaCl)为35.89%~42.85%。流体包裹体密度为0.56~1.08 g/cm³，估算成矿压力为11.71~42.91 MPa，深度为1.12~3.0 km。初步确定该矿床为中温岩浆热液铜矿床，成矿与闪长玢岩有成因联系。

Geological Character and Fluid Inclusions of Jubao Copper Deposit,Taonan,Jilin Province

The Jubao cpper deposit in Taonan, Jilin Province is situated at the Budunhua-Changchunling tectonic-metallogenic belt. The is made up of three lode groups. Altered diorite porphyrite and a SN trending-fault control the occurrence and distribution of the Copper mineralization. The main ore minerals found in the Jubao copper deposit are chalcopyrite, Pyrite and chalcocite with varied gold and silver enrichment. The ores are featured by matasomatic texture and veined and disseminated structures. The mineralization in the deposit could be divided into four stages：pyrite; chalcopyrite; polymettlic sulfides and carbonate stages. The fluid inclusions of the Jubao copper deposit is made mainly of vapor and liquid two phases and daughter mineral-bearing three phases. The two phases inclusions is 6-8 μm with gas/liquid ratio 10%-20%, homogenization temperature between 163.8-364.0 ℃ centered mostly around 180-240 ℃,and salinity (w(NaCl)) of 1.05%-10.62%. Daughter mineral-bearing three phases inclusions is 5-10 μm，gas/liquid ratio 3%-6%，homogenization temperature 270-367 ℃and  salinity (w(NaCl)) range of 35.89%-42.85%. The Density of the liquid inclusions is 0.56-1.08 g/cm³. The mineralizeing-pressure is estimated at 11.71-42.91 MPa and the mineralizing depth at  1.12-3.0 km. It is concluded that the Jubao copper deposit belongs to medium temperature magmatic hydrothermal deposit, and the mineralization is genetically related to the  diorite porphyrite.