新疆阿尔泰乔夏哈拉铁铜金矿床磁铁矿的化学成分标型特征和地质意义  

CHEMICAL COMPOSITION AND TYPOMORPHIC CHARACTERISTICS OF MAGNETITE AND ITS GEOLOGICAL SIGNIFICANCE IN QIAOXIAHALA IRON-COPPER-GOLD DEPOSIT OF ALTAI,XINJIANG

作　　者：应立娟[1] 王登红[2] 梁婷[3] 周汝洪 马军 屈文俊[6] 陈振宇[2] 

机构地区：[1]中国地质科学院研究生部,北京100081 [2]中国地质科学院矿产资源研究所,北京100037 [3]长安大学资源学院,陕西西安710054 [4]新疆地矿局,新疆乌鲁木齐830000 [5]新疆第四地质大队,新疆阿勒泰836500 [6]国家地质测试中心,北京100037

出　　处：《矿物学报》2006年第1期59-68,共10页Acta Mineralogica Sinica

基　　金：国家科技攻关项目(2003BA612A-01);地质大调查项目(200420190004);地质大调查项目

摘　　要：位于新疆阿尔泰造山带与准噶尔盆地过渡地带的乔夏哈拉铁铜金矿原是一个小型铁矿,近年来在深部发现有铜金矿体。根据乔夏哈拉东矿区矿体磁铁矿的单矿物化学分析和东、西矿区样品中磁铁矿的电子探针分析,发现磁铁矿富集轻稀土,Eu呈正异常,Ce呈负异常;微量元素中Co和Ni含量高,而Ti含量很低。Cu含量与Fe含量呈现明显的反相关。磁铁矿化学成分标型的初步研究显示,乔夏哈拉矿床磁铁矿成因与夕卡岩型及沉积变质型铁铜矿非常相似,指示存在找铜前景。The Qiaexiahala iron-copper-gold deposit was located at the transitional belt between the Xinjiang Altay orogenic belt and the Junggar Basin. it was regarded as a small iron deposit before, however, in recent years, it has been found expanding into a copper-gold deposit at depth. Based on the chemical analysis of individual magnetite from the orebedy in the eastern mining district, and the electron microprobe analysis of individual magnetite from samples in the eastern and western mining districts of Qiaoxiahala, it is suggested that magnetite was rich in light rare earth elements, had a positive Eu anomaly and a negative CO anomaly; it had high contents of Co and Ni, while low contents of Ti. The correlation between Cu and F is reverse with respect to their contents. Typomorphic research on magnetite primarily shows that the genesis of magnetite in Qiaexiahala was similar to that of magnetite in skam and sedimentary-metamorphic iron-copper deposits, suggesting a good potential for copper exploration.

关 键 词：磁铁矿 化学成分标型 铁铜金矿床 乔夏哈拉 新疆 

分 类 号：P578.4[天文地球—矿物学] P611.3[天文地球—地质学]