副族元素的成矿作用与矿田类型  

Metallogenesis of subgroup elements and related ore fields

作　　者：姜莲婷[1] 陈国能[1] 

机构地区：[1]中山大学地球科学系,广东广州510275

出　　处：《地学前缘》2011年第1期95-101,共7页Earth Science Frontiers

基　　金：高等学校博士学科点基金项目(20070558033)

摘　　要：岩石熔融-岩浆固结过程不仅导致花岗岩的形成,同时造成了副族微量元素的富集,形成不同类型的矿床和矿田。根据成矿元素与氧、硫元素的关系,文中将上述元素形成的矿田分为亲氧元素型、亲硫元素型和氧硫复合型。前者产于花岗岩体内部,成矿与成岩基本同时,矿田的形成主要受控于岩浆分异作用和岩体剥蚀深度;次者产于岩体外部,成岩与成矿具有一定的年龄差,矿田控制因素主要为深部重熔界面隆起区的埋深和相应控矿构造的产状;最后一类矿田的特征是花岗岩体内部产亲氧元素矿床(主要为铀钍),矿床与容矿岩体通常有巨大年龄差,在岩体外围则分布亲硫元素矿床,本类矿田的控制因素主要为区域地壳熔融(重熔)次数及晚期重熔界面隆起区的埋深。In-situ melting（remelting） not only results in formation of granite,but also in enrichment of subgroup elements to form different types of ore-deposits.The subgroup elements include oxyphiles and sulphophiles,and thus the related ore-field can be divided into three types,i.e.of oxyphiles,of sulfophiles and of both composited.The first type that occurred in granite body with the ages similar to that of the host rock is controlled by magmatic differentiation and its appearance depends on the erosion depth of the rock-body.The occurrence of the second type generally with different distance from the source granite body is controlled by both the depth of protuberant magma interface（MI） and the attitude of ore-controlled structure.The formation of the third type is related to multiple melting（remelting）,which is characterized by oxyphile（especially uranium） ore-deposit within granite and ore-deposit of sulfophiles in the surrounding of the rock body.

关 键 词：花岗岩 副族元素 原地重熔 矿田类型 

分 类 号：P611[天文地球—矿床学]