湘西沃溪金锑钨矿床褶皱构造及其控矿规律与动力成矿作用

湘西沃溪金锑钨矿床为一著名的大型综合矿床。本文介绍了矿区地质概况,较详细地研究了区内褶皱构造的发育特征;厘定了仙鹅抱蛋箱状倾伏背斜的存在,并将矿区内的褶皱构造划分为四级,认为不同级别的褶皱在不同期次的构造活动中存在着叠加行为;指出褶皱构造对该矿床具有多期、多级、等距、定位的控制作用,探讨了褶皱构造动力成矿的基本原理,并以此原理为指导,分析了该矿床的成矿机制,认为各期各级褶皱构造的脉动式叠加复合,使其褶皱构造动力成矿作用得到了强化,并最终形成了该矿床及其空间展布格局。

Fold Structure Of The Woxi Gold-Antimony-Tungsten Deposit In West Hunan And Its Ore-Controlling Regularity As Well As Dynamic Ore-Forming Process

The Woxi gold-antimony-tungsten deposit in west Hunan is a well-known large-sized composite ore deposit. This paper describes geological setting of the ore district. deals in detail with characteristics of fold structure in this area, and ascertains the existence of the Xianebaodan box plunging anticline. The folds in the ore district are divided into four grades, and folds of different grades are considered to have been superimposed on each Other in different phases of structural movement. It is pointed out that folds played such ore-controlling roles as multiperiodic activity, multi-grade, equidistance and location in this ore deposit. The basic principle of dynamic mineralization of fold structure is tentatively discussed and, Oil such a basis, the ore-forming mechanism of this deposit is analyzed. It is thought that the pulsating super-imposition and compounding of folds of various phases and grades intensified the dynamic mineralization of fold structure and eventually led to the formation of the Woxi ore deposit and its spatial distribution framework.