吉林海沟金矿地质特征及应力场分析  

GEOLOGIC CHARACTERISTICS AND TECTONIC STRESS FIELD OF HAIGOU QUARTZ-VEIN GOLD DEPOSIT IN JILIN PROVINCE

作　　者：冯明[1] 曹成润[1] 陈力[2] 董晓伟[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]吉林大学建设工程学院,吉林长春130026

出　　处：《地质与资源》2005年第4期268-271,共4页Geology and Resources

基　　金：国家重点基础研究发展规划973项目(2003CB211708)资助

摘　　要：海沟金矿是大型石英脉型金矿床,矿体严格受NE向断裂构造控制,成矿时代为晚侏罗世—早白垩世.矿石中金属矿物以黄铁矿、自然金、方铅矿和黄铜矿为主.28号主矿脉中,Au平均品位20.59×10-6.成矿物质来自地层和岩体.对构造应力场研究表明,矿区有3期构造应力场,分别是早期近S-N向挤压、中期NW向挤压和晚期NE向挤压.成矿期应力场最大主压应力方向为NE向.Haigou gold deposit in Jilin province is of a large quartz vein type. The ore bodies are strictly controlled by NE-trending fault structures. The ore-forming period ranges from Late Jurassic to Early Cretaceous. The metal minerals in ore are mainly pyrite, native gold, chalcopyrite and galena. The average grade of gold in the main ore vein is 20. 59 ×10^-6. Tectonic stress field analysis indicates that in the gold field, there are 3 tectonic stress stages, namely, the early style of S-N-trending compression, the middle stage of NW-trending compression and the last stage of NE-trending compression.

关 键 词：海沟金矿 构造应力场 石英脉 地质特征 

分 类 号：P618.51[天文地球—矿床学]