西华山钨矿的花岗岩组成及与成矿的关系

COMPOSITION OF XIHUASHAN GRANITES AND ITS RELATIONSHIP TO TUNGSTEN METALLOGENESIS

西华山钨矿田成矿花岗岩为一复式岩体,该复式岩体由燕山早期第二阶段西华山杂岩体、燕山早期第三阶段荡坪杂岩体和燕山晚期第一阶段花岗岩、花岗斑岩单一侵入体组成。与两期三个阶段花岗岩有关,相应具有3 次钨的成矿作用,形成了以西华山钨矿为代表的一系列不同规模的钨矿床,成为我国花岗岩区多阶段成岩多次成矿的典型范例。

A great deal of research shows that the ore-forming granite in the Xihuashan tungsten field is a compound intrusion and composed of the Xihuashan complex formed during the second stage of early Yanshanian, the Dangping complex formed during the third stage of early Yanshanian and the single granite and granoporphyry intrusion formed during the first stage of late Yanshanian. Three tungsten metallogenetic processes are associated with three stages of granite intrusions and a series of tungsten deposits (such as the Xihuashan tungsten deposits) of different sizes have been formed. This is a typical example in China of multistage diagenesis and multiple stages of mineralization in the same granite regions.