新疆海相火山岩型铁矿研究进展及问题  

Research Progress and Problems of Marine Volcanic Iron Deposit in Xinjiang

作　　者：武阳 申萍[1,2,3] 李昌昊 Wu Yang;Shen Ping;Li Changhao(Key Laboratory of Mineral Resources,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,100029,China;College of Earth and Planetary Science,University of Chinese Academy of Sciences,Beijing,100049,China;Innovation Academy for Earth Science,Chinese Academy of Sciences,Beijing,100029,China)

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学地球与行星科学学院,北京100049 [3]中国科学院地球科学研究院,北京100029

出　　处：《新疆地质》2021年第4期620-626,共7页Xinjiang Geology

基　　金：国家重点研发计划项目(2018YFC0604004)资助。

摘　　要：海相火山岩型铁矿是近年来发现的重要富铁矿矿床类型。前人通过对不同矿床围岩进行锆石U-Pb年龄、黄铁矿Re-Os年龄、石榴子石Sm-Nd年龄和磁铁矿Re-Os年龄测试,认为主要形成时代多集中于古生代,此类矿床直接定年仍较困难。据矿床矿化特征认为有火山沉积型、火山岩浆-热液型和类矽卡岩型等成因类型。据磁铁矿电子探针、La-ICP-MS和Fe同位素实验认为,成矿物质为岩浆与岩浆-热液来源。该类矿床产出形态与矿床成因多与火山作用相关,距火山口由近及远具明显变化规律,造成同一成矿带中分布着不同成因矿床。其它类型铁矿已开展十分精细的矿物学成矿过程研究,矿床形成过程中的多期次成矿作用导致矿床兼具多种成矿类型特征。Submarine volcanogenic iron oxide deposits are an important type of iron-rich ore deposits,according to the zircon U-Pb age,pyrite Re-Os age,magnetite Re-Os age and garnet Sm-Nd age of the wall rock of different ore deposits,the result shows that thess mainly formed during the Paleozoic,but directly for such deposits dating is still more difficult.According to the mineralization characteristics of the deposit,it is considered that the deposit has volcanic sedimentary type,volcanic magmatic hydrothermal type and skarn-like type.According to the EMPA,LA-ICP-MS and Fe isotope experiments of magnetite,the source of ore-forming materials is considered to be magmatic source and magmatic hydrothermal source.In addition,the occurrence form and genesis of these deposits are mostly related to volcanism,and there are obvious changes from near to far from the crater,so the genesis of different deposits in the same metallogenic belt is caused.Exquisite mineralogical metallogenic processes of other types of iron ores have been studied.The multistage mineralization in the process of deposit formation leads to the characteristics of multiple metallogenic types.

关 键 词：海相火山岩型铁矿 磁铁矿 成矿模式 

分 类 号：P618.31[天文地球—矿床学]