吉林省东南部白山市金英金矿床金赋存状态及流体包裹体特征  

Occurrence state of gold and characteristics of fluid inclusions in Jinying Gold Deposit,Baishan City,southeast Jilin Province

作　　者：汪徽 温守钦[1] 李敏[1] 朱恩静[1] Wang Hui;Wen Shouqin;Li Min;Zhu Enjing(School of Resources and Civil Engineering,Northeastern University)

机构地区：[1]东北大学资源与土木工程学院

出　　处：《黄金》2024年第2期80-84,共5页Gold

基　　金：国家重点研发计划项目(2016YFC0801603)。

摘　　要：金英金矿床位于中朝准地台北缘东段,铁岭—靖宇隆起与太子河—浑江陷褶断束接触界面凹陷侧。通过野外实际调查、矿相学、电子探针和流体包裹体测试综合研究发现:该矿床矿物组成简单,矿石类型为硅化构造角砾岩型,金矿物种类有自然金、含银自然金和银金矿,载金矿物主要为石英,主要以裂隙金形式赋存,其次以粒间金和包裹金形式赋存;石英中包裹体多为气液两相包裹体,形态以椭圆形、菱形和不规则形为主,成矿温度139.6℃~253.1℃,盐度1.74%~4.65%,密度0.79~0.94 g/cm^(3),成矿压力33.6~65.6 MPa,成矿深度1.2~2.4 km,属中低温低盐度低密度流体。Jinying Gold Deposit is situated on the eastern section of the northern margin of China-Korea quasi-platform.It lies on the depression side of the contact interface between Tieling-Jingyu uplift and Taizihe-Hunjiang depression fold fault bundle.Through field investigation,mineralogical analysis,electron probe,and fluid inclusion testing,it has been determined that the deposit s mineral composition is uncomplicated and consists of siliceous structural breccia-type ore.The gold mineral species include native gold,silver-bearing native gold,and electrum,with quartz being the primary host for gold which occurs mainly as fissure gold,followed by intergranular and encased gold.The inclusions within quartz consist primarily of gas-liquid two-phase fluids,which take on a predominantly oval,diamond and irregular form.Ore formation occurs at temperatures ranging from 139.6℃to 253.1℃,with salinity levels between 1.74%and 4.65%,densities ranging from 0.79 g/cm^(3)to 0.94 g/cm^(3),pressures between 33.6 MPa and 65.6 MPa,and depths of formation spanning from 1.2 km to 2.4 km;these characteristics classify the fluid as medium-low temperature,low salinity,and low density.

关 键 词：赋存状态 成矿流体 流体包裹体 沉淀机理 金英金矿床 

分 类 号：TD11[矿业工程—矿山地质测量] P618.51[天文地球—矿床学]