吉林小西南岔金铜矿床的成因探讨

Research on the genesis of Xiao-Xi-Nan-Chagold-copper deposit in jilin Province

小西南合金铜矿床具有多源、多期、多阶段成矿之特点，成矿主要与海西晚期闪长岩体和燕山期闪长玢岩脉有关。通过对矿床地质特征、同位素地质学、石英包体成分及稀土元素特征等方面研究，认为成矿物质来源于海西晚期闪长岩和燕山期闪长玢岩脉侵位时深部矿源的补给，成矿水为岩浆水和大气降水的混合，成矿热源为次火山岩浆活动。成因类型为浅成次火山热液型金铜矿床。

Xiao--Xi--Nan--Cha Sold--copper deposit is characterized by multiple source, multiphaseand multistage minerogenesis,mainly related to late Variscan diorite bodies and yanshanian diorite--porphyrite veins. According to the research of the geological characteristics of the deposit,the isotope geology, the composition of quartz inclusion and the characteristics of REE etc,the writer believes thatminerogentic material came from the late stage diorite of Variscan cycle and the superposition of deepore source as Yanshanian dioriteporphyrite veins intruded,its minerogenetic water is the result of magmatic water mixing with precipitate water,the minerogenetic heatsource results from subvolcano magmatic activities and the genesis style is a gold--copper deposit of subvolcanic hydrothermal type.