西藏雄村铜金矿矿集区Ⅰ号矿体磁黄铁矿矿物特征及指示意义  

Typomorphic Characteristics and Significance of Pyrrhotite in Xiongcun Cu-Au Deposit

作　　者：李志军[1] 黄勇[1,2] 唐菊兴[3] 张丽 郎兴海[1,2] 

机构地区：[1]成都理工大学,四川成都610059 [2]西藏天圆矿业资源开发有限公司,西藏拉萨857000 [3]中国地质科学院矿产资源研究所,北京100037 [4]成都地质调查中心,四川成都610059

出　　处：《矿物学报》2012年第2期205-210,共6页Acta Mineralogica Sinica

基　　金：国家自然科学基金(批准号:41172077);国家973项目(编号:2011CB403103)

摘　　要：雄村铜金矿是近年来西藏发现的又一大型斑岩铜金矿床,矿体中主要的金属矿物为黄铜矿、黄铁矿、磁黄铁矿、磁铁矿、方铅矿、闪锌矿。磁黄铁矿在矿石中含量较高,并常与黄铜矿紧密共生,电子探针分析结果表明,磁黄铁矿存在六方和单斜两种晶型,分析结果表明,雄村铜金矿矿物生成顺序为cp+py+mag→cp+py+pyr→py+sph+gal,成矿温度始于360℃,成矿系统温度下降缓慢,成矿时间较长。Xiongcun Coper-gold deposit is one of the large porphyry copper-gold mines discovered in Tibet,with ore minerals including chalcopyrite,pyrite,pyrrhotite,magnetite,galena and sphalerite.The pyrrhotite is high in ore and usually accretes to chalcopyrite.It is indicated with the electron microprobe that the pyrrhotite has two crystal forms,hexagonal and monoclinic.The ore-forming sequence is following the order of cp＋py＋mag,cp＋py＋pyr and py＋sph＋gal.According to the result of micropobe analysis,the formational temperature is about 360 ℃ and then drops slowly,suggesting the long time of mineralization.

关 键 词：磁黄铁矿 矿物特征 斑岩型铜金矿 雄村 西藏 

分 类 号：P571[天文地球—矿物学] P578.2[天文地球—地质学]