吉林省临江市东八里沟金矿地质特征及成矿成因  

Geological features and metallogenic genesis of Dongbaligou gold deposit in Linjiang City, Jilin Province

作　　者：任利明[1] 李晓朋[1] REN Liming;LI Xiaopeng(Institute of Exploration Geophysical of Jilin Province,Changchun 130012,Jilin,China)

机构地区：[1]吉林省勘查地球物理研究院,吉林长春130012

出　　处：《吉林地质》2022年第3期1-10,共10页Jilin Geology

摘　　要：东八里沟金矿位于吉林省临江市,地处南岔—小四平贵金属—多金属成矿带南西段,成矿地质条件优越。矿区出露在老岭岩群花山岩组下部岩性段(Pt1h1)和珍珠门岩组中部岩性段(Pt1zh2),矿体赋存于古元古界老岭岩群花山组下部千枚状二云片岩蚀变破碎带中,矿化蚀变以磁黄铁矿化、黄铁矿化、方铅矿化、毒砂为主。矿石类型主要为黄铁矿破碎蚀变岩型金矿石,局部夹有少量的黄铁矿石英脉型金矿石。Ⅱ号矿带内共发现4条金矿体,其中,Ⅱ-4号为主矿体,属小型规模,成因类型为产于绿片岩系中的变质-热液型金矿床,矿石类型为富硫化物含金蚀变岩型。获矿石量341 kt,金金属量(控制+推断)2 199 kg,其中控制资源量占比50.98%;伴生元素银:5.46 t;铅:1 303 t;砷:7 229 t。From July 2005 to October 2018, the geological exploration of Dongbaligou gold deposit was divided into three stages: pre survey, general survey and detailed survey. Through 1∶50 000 stream sediment survey, 1∶10 000 geological mapping, soil survey, geomagnetic survey, IP intermediate gradient survey, 1∶1 000 geological mapping and other regional work, combined with the necessary trenching and drilling projects, the No.Ⅱ mineralized alteration zone(ore zone for short) was delineated, and the Dongbaligou gold mine was found and systematically evaluated. The number, shape, scale, occurrence and spatial distribution characteristics of the gold ore bodies in the No.Ⅱ ore zone in the exploration area have been basically found out, and the distribution characteristics of ore bodies and roof and floor surrounding rock, as well as the type, intensity and scale of surrounding rock alteration have been found out. The lithology and distribution of interlocking ore bodies were basically ascertained. A total of 4 gold ore bodies are found in the No.II ore zone, of which No.Ⅱ-4 is the main ore body, belonging to small scale, the genetic type is metamorphic hydrothermal gold deposit occurring in greenschist series, and the ore type is sulfide rich gold bearing altered rock type. The amount of ore obtained is 341 kt, and the amount of gold metal(control + inference) is 2 199 kg, of which the controlled resources accounts for 50.98%;Associated elements silver 5.46 t, lead 1 303 t, arsenic 7 229 t.

关 键 词：东八里沟 低温变质热液型金矿床 成矿模式 

分 类 号：P618.51[天文地球—矿床学]