内蒙古自治区额济纳旗梧桐井西磁铁矿点成因类型分析  

Genetic Types of Magnetite from West Wutongjing of Ejin Banner,Mongolia

作　　者：徐旭明[1] 陈海燕[1] 程海峰[1] 

机构地区：[1]河北省区域地质矿产调查研究所,河北廊坊065000

出　　处：《甘肃冶金》2017年第3期51-54,共4页Gansu Metallurgy

摘　　要：内蒙古额济纳旗梧桐井西磁铁矿点产于早志留世中细粒黑云石英闪长岩、中细粒含黑云二长花岗岩和古元古代北山岩群第二岩组的接触带内。笔者通过内蒙古自治区额济纳旗梧桐井等六幅1∶5万区域矿产地质调查,对该磁铁矿点地质特征、磁异常特征、矿化特征、矿体特征进行了调查研究,对该矿点的控矿因素、成因类型等进行了分析和总结,认为古元古界北山群第二岩组角闪岩、蛇纹石化大理岩、透辉橄榄岩、透辉阳起岩是形成该磁铁矿点的赋矿层,而早志留世侵入岩的侵入活动为成矿元素的活化、萃取、运移提供了热源和载体,最终形成了矽卡岩型磁铁矿。Magnetite come from within the contact zone of quartzdiorite and monzonitic granite in Early Silurian, Beishan terrain of paleoproterozoic era, . in Mesozoic-cenozoic in Inner Mongolia. The author surveyed the geologic feature, magnet- ic anomaly, mineralization characteristics and features of the ore of magnetite through regional geological survey of the 1：50 000 for Wutongjing, Analysis and summary the ore-controlling factors and genetic type. Considered the hosting ledge of Mongolia is Beishan terrain of paleoproterozoic era, serpentinization marble, diopside peridotite and Diopside rock actin- olite. It offered heat source and isotopic carrier for excitation, extracted and migration of ore-forming element of intrusion activities of rocks from Early Silurian. Eventually formed the skarn type magnetite.

关 键 词：北山岩群 矽卡岩 石英闪长岩 梧桐井 磁铁矿 

分 类 号：P618.31[天文地球—矿床学]