湖南安化大溶溪白钨矿床成矿特征及富集条件

矿床产于印支期大神山花岗岩株外接触带之震旦系下统南沱砂岩组中。矿体产状一般与围岩一致，呈层状、似层状，并呈现同步褶皱。成矿作用是在含钨建造钨初始富集的基础上，在花岗岩侵入产生的巨大热力驱动下发生的。特定层位和岩体是其成矿的必要条件，属似矽卡岩型白钨矿床。

METALLOGENIC CHARACTERISTICS AND CONCENTRATION CONDITIONS OF DARONGXI SHEELITE DEPOSIT OF ANHUA, HUNAN

This deposit occurs in Lower Sinian Nantuo sandstone at the exocontact zone of an Indosinian Dashenshan granite stock. The Ore bodies are in conformity with the country rocks in attitude, occurring in bedded or bed-like form and forming synchronous folds. On the basis of an initial concentration of tungsten in the tungsten-bearing formation, mineralization took place under the strong driving force of heat produced during the intrusion of the granite. A particular horizon and a particular intrusion are the necessary conditions for mineralization. This deposit belongs in the skarnoid scheelite type.