扬子地块西南缘大红山IOCG矿床中铁矿石铂族元素研究  

The Iron Ore PGE Research of Dahongshan IOCG Deposits in Southwestern Margin of the Yantze Platform

作　　者：吴愧 李佑国[1] 金廷福[1] 周恒[1] 俞一凡[1] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059

出　　处：《四川有色金属》2017年第3期47-50,共4页Sichuan Nonferrous Metals

基　　金：川滇黔成矿带基底铜多金属成矿带成矿模式及其找矿模型研究;地调项目(12120113094900)

摘　　要：本文采集了大红山铁氧化物-铜-金(IOCG)矿床成矿中期铁氧化物阶段的铁矿石,进行了相关铂族元素测试分析,并对该矿床铁矿石物质来源及成因的作研究。其样品配分型式具有一致的正斜率的"Pt-Pd"型,Rh-Pd向左陡倾斜,中Pt、Pd较Rh、Ru、Ir富集,具有Ru正异常、Rh负异常,Ir、Ru、Rh、Pt、Pd与MORB较为相似,而与地幔相比均有明显富集;Pd/Ir比值为119.3~468.6(其平均为289.9),且Ir和Ru具一定的正相关关系。反映磁铁矿石早期可能与岩浆活动有关,而后期受热液改造明显。This paper collected iron ore formed in iron-oxide phase in the Dahongshan（IOCG）-copper-gold deposit and discussed the iron ore material source and formation by PGE test.the iron ore samples of PGE in the primitive mantle standardization model has roughly similar distribution pattern, there was a positive slope type ＂Pt, Pd, Rh, Pd steep slope to the left, Pt, Pd, Rh, Ru, Ir enrichment with Ru is abnormal, Rh negative anomaly, Ir,Ru, Rh, Pt, Pd and MORB relatively similar, and compared with the mantle are obvious enrichment, these characteristics suggest that iron ore with a consistent source of material; Pd/Ir ratio is 119.3~468.6（average 289.9）,and the Ir and Ru has certain positive correlation, reflecting the magnet ore may be associated with magma activity, early and late heating liquid transformation.

关 键 词：PGE 铁矿石 IOCG 大红山 扬子地块西南缘 

分 类 号：P618[天文地球—矿床学]