安庆铜铁矿床磁铁矿成矿机理探讨  

DISCUSSION ON THE GENESIS OF MAGNETITE IN THEANQING Cu-Fe ORE DEPOSIT

作　　者：范良伍[1,2] 张乾[1] 温汉捷[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550002 [2]中国科学院研究生院,北京100039

出　　处：《矿物学报》2008年第4期476-482,共7页Acta Mineralogica Sinica

基　　金：安徽铜都铜业股份有限公司安庆铜矿与中国科学院地球化学研究所合作项目

摘　　要：安庆铜铁矿床是长江中下游铜铁成矿带中一典型的铜铁共生矿床,总结前人的稀土元素、同位素年龄、熔融包裹体测温资料和模拟实验成果,综合分析与矿床有关的侵入岩浆特征、矿床的空间分带、矿物共生组合以及全铁含量在矿床中的空间分带变化特征,发现矿床中的磁铁矿带在产状上和成因方面均具有岩浆成因的特征,提出早期的磁铁矿可能是岩浆结晶分异形成的,指出矿床早期形成的大规模磁铁矿带可能对后期的成矿作用产生影响。In order to study the metallogenetic regularity of the Anqing Cu-Fe ore deposit, the authors analyzed the characteristics of the initial magma for intrusive rocks, zonation of ore deposit, mineral paragenesis, and dimensional variation of FeO^＊ contents in this paper in terms of the published data and information about REE distribution pattern, isotopic geochronology, homogenization temperatures of melt inclusions and simulating experiments. It is found that the geochemical characteristics and occurrence of ore bodies in the magnetite belt are in accord with those of magmogenic deposits. So it is suggested that early-stage magnetite is of magmatic origin, and it is pointed out that this type of massive magnetite belts may exert some influence on later mineralization.

关 键 词：安庆铜铁矿床 磁铁矿 成矿机理 岩浆成因 安徽 

分 类 号：P578.4[天文地球—矿物学] P611.1[天文地球—地质学]