四川木里博念沟金矿地质特征及找矿预测  

Geological Characteristics and Prospecting Prediction of Boniangou Gold Deposit in Muli County,Sichuan Province

作　　者：马鹏程 王富东[1] 朱余银[1] 韦红样 高贤君 李虎杰[1] Ma Pengcheng;Wang Fudong;Zhu Yuyin;Wei Hongyang;Gao Xianjun;Li Hujie(School of Environment and Resource,Southwest University of Scienee and Technology,Mianyang 621010,China;The 402 Geological Party,Sichuan Bureau of Geology ＆ Mineral Resources,Chengdu 611743,China;Regional Geological Survey Party,Sichuan Bureau of Geology ＆ Mineral Resources,Chengdu 610213,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010 [2]四川省地质矿产勘查开发局402地质队,四川成都611743 [3]四川省地质矿产勘查开发局区域地质调查队,四川成都610213

出　　处：《金属矿山》2018年第10期121-129,共9页Metal Mine

基　　金：矿床地球化学国家重点实验室开放课题(编号:201505);广州地球化学研究所矿物与成矿实验室开放课题(编号:GLMPM-009);西南科技大学龙山学术人才科研支持计划项目(编号:17LX662).

摘　　要：博念沟金矿位于西南三江地区重要的金多金属成矿带——甘孜—理塘结合带。为寻求找矿突破,加快博念沟矿区探矿工作步伐,结合区内地质工作成果,对区域成矿地质背景、矿床地质特征、矿体特征、矿石特征进行了详细研究。结果表明:(1)矿区金矿化类型属于破碎带蚀变岩型,控矿因素主要为一组NNW向断裂,铜钼矿化属于斑岩铜钼矿型,控矿因素主要为二长闪长玢岩;(2)矿床金属矿物主要为黄铁矿、自然金、辉钼矿、黄铜矿、褐铁矿等,脉石矿物主要有石英、长石、绢云母、绿泥石等,脉石矿物的含量在不同的围岩蚀变带及矿体中有较大区别;(3)矿区化探结果显示,格舒矿段出现Au、Ag、Zn、Pb等元素异常,其中Au极值达到214×10-9,浓集中心点多达7个;苍金矿段出现Pb、Zn、Cu、As等元素异常,且异常带元素套合性较好,上述2个矿段均显示出良好的找矿潜力。在上述分析的基础上,总结了找矿标志,并认为在甘孜—理塘结合带中除了构造蚀变岩型金矿找矿前景较好外,斑岩型矿床也具有良好的找矿潜力。Abstract Boniangou Gold Deposit is located in Garzi-Litang suture zone, which is one of the important Au-polymetal- lic metallogenic belts in Sanjiang region.In order to seek the prospecting breakthrough of the mining area and speed up the progress of the prospecting work of Boniangou mining area, the regional metallogenic geological background, geological char- acteristics of the deposit, geological characteristics of the orebodies and ore characteristics are analyzed in detail based on the geological working results of Boniangou mining area.The study results show that：①the gold mineralization type of the mining area belongs to the fracture zone alteration rock type, the ore-controling factor is mainly for a group of NNW-trending fault, the copper-molybdenum mineralization belongs to porphyry copper molybdenum ore type, the corresponding ore-controlling factor is monzonite diorite porphyry ; ②the metallic minerals are mainly for pyrite, native gold, molybdenite, chalcopyrite and limonite, the gangue minerals are mainly for quartz, feldspar, sericite and chlorite, the gangue mineral content in different wall rock alteration belt and orebodies have bigger difference ; ③the results of geochemical exploration show that there are anomalies of Au, Ag, Zn, Pb and other elements in Geshu ore section, where Au has an extreme value of 214 x 10.9 and the number of concentration center is 7 ; Cangjin ore section have the anomalies of Pb, Zn, Cu, As and other elements, and theanomalies have better associativity with each other, the prospecting potential of the above two ore sections are both good. Based on the above analysis results, the favorable prospecting indicators of the mining area are summarized, besides that, the further study results indicated that except for the structural alteration rock type gold deposit, the porphyry deposit also has prospecting potential in Garzi-Litang suture zone.

关 键 词：构造蚀变岩型金矿 地质特征 水系沉积物测量 土壤地球化学测量 矿床成因 找矿标志 

分 类 号：P618.51[天文地球—矿床学] P632[天文地球—地质学]