内蒙古乌尔根东部斑岩型钼矿床成矿期次  

A study on metallogenic stages of the eastern Ulgen porphyry molybdenum deposit in Inner Mongolia Autonomous Region,China

作　　者：汪徽 温守钦[1] 张光亮[1] 唐铁乔 马鹏程 张凯伦 刘博 WANG Hui;WEN Shouqin;ZHANG Guangliang;TANG Tieqiao;MA Pengcheng;ZHANG Kailun;LIU Bo(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿物学报》2024年第1期133-142,共10页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(编号:41802236)。

摘　　要：内蒙古额尔古纳市乌尔根东部斑岩型钼矿床位于大兴安岭北段,通过野外实际调查和矿相学研究发现,该矿床存在2类明显不同的辉钼矿。结合电子探针、Re-Os同位素测试和流体包裹体测试,发现2类辉钼矿在主量元素S、Mo组成和微量元素组合上均存在着明显不同。辉钼矿存在2组年龄:1组为136.4 Ma;另1组为146.0 Ma。综合分析认为,乌尔根东部钼矿床形成于晚侏罗—早白垩世,矿床存在2次沸腾作用,导致辉钼矿经历2次成矿,矿床存在着2期辉钼矿矿化。The eastern Ulgen porphyry molybdenum deposit in Erguna City,Inner Mongolia is located in the northern section of the Greater Khingan Mountains.Through field investigation and mineralogical study,it is found that there are obviously different two kinds of molybdenite in the deposit.Combined with data of electron probe analysis,Re-Os isotope test and fluid inclusion test,it is found that the two types of molybdenite have obvious different characteristics in compositions of major elements including S and Mo and trace elements.Two types of molybdenite have respective two Re-Os ages,one is 136.4 Ma,the other is 146.0 Ma.Based on the comprehensive analysis,it is believed that the eastern Ulgen molybdenum deposit was formed in the late Jurassic-Early Cretaceous.Two times of boiling processes resulted in two times of molybdenite mineralization.All evidences indicate that there are two stages of molybdenite mineralization in the deposit.

关 键 词：斑岩型钼矿床 辉钼矿 RE-OS同位素 包裹体 乌尔根东部 

分 类 号：P579[天文地球—矿物学] P618.65[天文地球—地质学]