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.
出处
《地质与资源》
CAS
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
关键词
海沟金矿
构造应力场
石英脉
地质特征
Haigou gold deposit
tectonic stress field
quartz vein
geologic characteristics
作者简介
冯明（1958-），男，辽宁大连人，副教授，1982年毕业于长春地质学院，主要从事构造地质研究，通讯地址吉林省长春市亚泰大街4026号吉林大学应用技术学院国土资源系，邮政编码130022，E-mail／／fengm@jlu．edu．cn
