摘要
根据铜厂铜矿床辉钼矿ＲｅＯｓ同位素模式年龄和黄铜矿ＲｂＳｒ同位素等时线年龄分别为８８９Ｍａ和３５９Ｍａ，并依据其地质特征和与铜厂岩体之间时空关系，认为早期铜矿化发生在８８９Ｍａ左右，与铜厂岩体岩浆期后热液有关；晚期铜矿化则发生在３５９Ｍａ左右，是伴随区域动力变质作用发生的；其矿质来源研究表明既有来自围岩的，又有来自岩体本身的；包裹体测温资料表明成矿温度集中在两个区间：高温大于３００℃，低温１５０～２００℃。该矿床为多期、复源、多种成矿作用叠加复合的产物。
Re Os isotopic model age of molybdenite and Rb Sr isochron dating identify mineralization epoch of Tongchang copper deposit were 889 Ma and 359 Ma, which correspond with post magmatic hydrotherm and regional dynamic metamorphism respectively. Study of ore source shows ore matter coming from wall rock and intrusive rock. Temperature measuring of ore forming inclusion fluid distribute on two limits: high temperature > 300 ℃ and low temperature 150～200 ℃. Summing up above mentioned, it is concluded that Tongchang copper deposit belongs to multistage, polysoure, multigenc process cmposite deposit.
出处
《西安工程学院学报》
1998年第3期24-27,共4页
Journal of Xi'an Engineering University
基金
地矿部九五科技攻关项目
关键词
铜矿床
成矿时代
地质意义
热液成矿
metallogenic chronology, post magmatic hydrothermal, dynamic metamorphism, Tongchang
