摘要
胶东半岛金矿床的矿体(脉)均严格受断裂构造控制,这种控矿的脆/韧性叠加构造的显著特点是多期(次)活动的叠加,经过了早期的韧性剪切、后期的脆性压扭性碎裂岩化、晚期的脆性张性断裂叠加3个阶段。脆/韧型叠加构造与按"构造相"划分的脆-韧性剪切带是不同的概念,它们是性质和演化历史完全各异的两类断裂构造。金矿往往直接产于张性断裂之中,但是在同空间中更早形成的韧性剪切带和压扭性碎裂岩则对金矿化的规模具有明显的控制作用。
Gold ore deposits （bodies） in Jiaodong peninsula are all strictly controlled by fractural zones at which multi-brittle/ductile shearing are superiposed. The shearing is divided into the early ductile shearing,the late compresso-shearing and latest brittle tensile fracturing. The concept of brittle/ductile shearing superimposition is varied from that of britlle-ductile shear zone defined by tectonite phase. They are the different fractural structures in the evolutionary history. Au ore deposits are typically located in tensile fractural zone but the earlier ductile shear zone and the compresso-sheared rock control large size Au deposit.
出处
《地质找矿论丛》
CAS
CSCD
2008年第2期125-129,共5页
Contributions to Geology and Mineral Resources Research
关键词
控矿构造
金矿体
胶东半岛
ore-control structure
Au ore body
Jiaodong peninsula
