摘要
冀东地区是我国重要的金矿床密集区之一。根据金矿床形成的地质环境和后期的活化改造作用特征,将本区金矿床划分为两大系列、五大类型,两大系列为以太古宙花岗岩-绿岩带为容矿岩的金矿床系列和以中新元古界碎屑岩碳酸盐岩为容矿岩的金矿床系列。以太古宙花岗岩-绿岩带为容矿岩的金矿床系列又划分为绿岩带同构造期初生型金矿床和绿岩带后构造期与中生代壳源深熔花岗岩有关的再生型金矿床。以中新元古界碎屑岩碳酸盐岩为容矿岩的金矿床系列再细分为与造山带岩浆隐爆作用有关的金矿床,与造山带碰撞型壳源深熔花岗岩有关的金矿床和与造山带伸展构造作用有关的金矿床。同时分别叙述了冀东地区各类金矿床的地质特征。
The region of Eastern Hebei is one of the most important metallogenic focus-area in China. According to metallogenic geological environment and the mobilization and reformation, gold deposits can be devided into two metallogenic series. One is in the Archaean granite-greenstone belt, the other is Meso-Neo Proterozoic clastic rocks and carbonate-hosted gold deposits. The gold deposits in Archaean granite-greenstone belt can be devided into syntectonic primary gold deposits and post-tectonic regenerated gold deposits associated with anatexis magmatic rocks. Meso-Neo Proterozoic clastic rocks and carbonate-hosted gold deposits can be divided into three types of gold deposits associated with magma cryptoexplosion in orogenic zone, collision-type of anatexis magmatic rocks in orogenic zone and extensional tectonism in metamorphic core complex body. And also, geological character of these gold deposits has been expounded in the paper.
出处
《前寒武纪研究进展》
2002年第2期73-79,共7页
Progress in Precambrian Research
基金
地质行业科学技术发展基金项目(hy979832)
国土资源部九五科技攻关项目(95-02-003)资助
