摘要
戈枕断裂带为印支期形成的区域性拆离构造带。沿拆离带北东段主要以脆—韧性变形为主,形成韧性剪切带构造;南西段以韧—脆性变形为主。沿拆离构造带金矿床呈串珠状分布,并具等距性。矿脉裂隙符合简单剪切裂隙的发育,它们在空间上的分布规律有五种情况。金矿化受韧性变形强度的控制。戈枕拆离构造带经历了由韧性变形到脆性变形的演化过程,表现的金矿化也具多阶段性。矿脉的类型、方位及矿脉所显示的时间关系可用它们赖以形成的变形作用解释。最后笔者指出了本区进一步找矿的方向。
Ge—zhen fault zone is a regional detachment fault zone (DFZ) during Indosinian Movement. The northeastern part is mainly of brittle—ductile deformation, and the southeastern part, ductilebrittle deformation. Ge—Zhen DFZ is also a ore—controlled structure along which important primary gold occurrences are mainly confined to structural contacts. Gold vein is filled in the fractures which formed in the system of simple shear. Gold mineralization intensity is controlled by the strength of ductile deformation. The DFZ has undergone ductile—to—brittle deformation. There is a series of mineralization epoches. The types and distribution of gold veins are closly related to their deformations. The paper finally points out the possible prospecting area in this district.
出处
《地质找矿论丛》
CAS
CSCD
1991年第1期28-37,共10页
Contributions to Geology and Mineral Resources Research
