摘要
广东河台金矿的区域、矿田和矿床构造都是属于不同规模、级次及不同变形域类型的韧性剪切带,特别是控制矿床和矿体的是发育良好的深层韧性剪切带。河台金矿是典型的剪切带型金矿,所谓“剪切带型金矿”是受多级韧性剪切带构造控制,并以剪切作用为主要成矿机制的金矿床,可划分为剪切带糜棱岩型和剪切带脉型金矿,这两类是剪切带递进变形的产物。
In Hetai gold-deposit, the regional tectonics, the ore-field structures, andthe ore-deposit structures are controlled by ductile shear zone (DSZ), especiallyby deep-seated DSZ with well-developed ore-deposit structures. In the DSZ, var-ious kinds of macro- and micro-structures have their own characteristics; my-lonites are well developed; the marks of structural elements and deformationenvironments are distinct; and the occurrence of Au-deposit is closely related tothe structures of DSZ. Hetai gold-deposit is classified as an Au-deposit of DSZ type. The so-called'Au-deposit of Shear Zone Type' suggests that its occurrence is strictly control-led by DSZ with shearing as main metallogenic mechanism, and it may be sub-divided into two categories, namely the shear-zone dissemination-mylonite typeand the sheear-zone vein type. These two types of Au-deposit are products fromdifferent stages of progressive shear deformation, and restricted within differentorders of structures in the shear zone.
基金
国家自然科学基金
关键词
金矿
构造特征
金矿
类型
剪切带
ductile
shear zone
type of gold-deposit
Hetai
Guangdong
