小水井金多金属矿集区构造变形及成矿作用

小水井金多金属矿集区，处于哀牢山造山带锋带或后陆（盆）缘地带，集中分布在哀牢山主造山期后残留的石羊江复式背斜变形区域，在该区多年矿产勘查与开发工作后，发现石羊江复式背斜实为一个由边缘或基底主干断裂控制。并在后期的变形变质过程中形成的冲起构造，原东翼发育的断裂属一组与边缘主干断裂倾向相反，上盘上升的前展式叠瓦状反冲断裂系，总体构成陆缘背冲型叠瓦状逆冲推覆构造格架，该构造系统在垂向上，水平方向上均控制了区内成矿元素或含矿热液的矿化范围，强度与规模，多层次成矿系统或成矿条件的耦合，即构成了以冲起构造为轴心的离散型陆缘构造-成矿系统。运用上述成矿模式在该区内实践，先后发现十余处以金矿为主的矿床（点），取得找矿重大突破，亦为在类似区域找矿提供了新的思路和方向。

ON THE STRUCTURAL DEFORMATION AND METALLOGENESIS IN XIAOSHUIILNG GOLD MULTIMETALLIC CONCENTRATION AREA

The Xiaoshuijing Au multimetallic concentration area in the front or rear land(basin)margin belt of Ailaoshan orogen is distributed rather concentratedly in the Shiyangjiang anticlinorium deformation area remained after the main period of Ailaoshan orogeny.According to the mineral resources exploration and development in many years,we have discovered that the Shiyangjiang anticlinorium is an upthrust structure formed in the later metamorphism and deformation and controlled by main faults of the margin or basement.The faults developed on the east limb belong to a forward opening imbricate inverse thrust series,with inverse dip to that of the main marginal fault and upside upraised.Wholly,it forms a imbricate inverse thrust nappe structure of epicontinental back thrust type.This structure system controlls the metallogenetic range,intensity and scale of metallogenetic elements or ore bearing hydrothermal activity in horizontal and vertical directions of this area.The metallogenetic system or condition with many levels form a divergent epicontinental structure metallogenesis system with an upthrust struvture axis. According to this metallogenesis model,we have discovered 10 odd ore deposit(or occurrence)mainly of Au.And it is a new direction of ore prospecting in the similar area.