湖南龙山金锑矿床围岩蚀变及其与金矿化的关系

THE LONGSHAN Au-Sb DEPOSIT: THE RELATION OF WALL ROCK ALTERATION WITH GOLD MINERALIZATION

龙山金锑矿床属典型的蚀变破碎带型矿床，蚀变破碎带控制着矿体的规模和产状。根据矿体围岩的蚀变类型以及围岩中化学成分、微量元素的差异，将蚀变围岩划分为三个带。由内带到外带表现出蚀变强度由强到弱，矿物组成由复杂到简单等一系列变化。同时对蚀变带的含金性进行了研究，指出了金矿化与蚀变类型之间的密切关系。

The Longshan An-Sb deposit is presented in the fractured-altered zone by which the attitude and dimension of ore bodies are controlled. The altered wall rocks can be divided into three zones in the light of alteration types and elementary composition. In response to the transition from the centre to the margin within the alteration zone, the alteration changes from strength to weakness and paragenetic association of minerals from complication to simplicity. The gold contents of the altered fractured zone has been studied and the relation of gold mineralization with alteration types identified.