内蒙古阿拉其图东铜矿床成因探讨及找矿潜力分析

Genesis and prospecting potential of Alaqitudong Copper Deposit in Inner Mongolia

阿拉其图东铜矿床产于狼山成矿带上,为近年来新发现的铜矿床。通过系统研究一手地勘资料及地球化学分析手段,剖析矿床和矿体地质特征,探讨矿床成因,分析找矿潜力,对本区以及外围找矿具有指导和借鉴意义。研究指出,矿床受中元古界渣尔泰山群阿古鲁沟组二岩段(Jxa2)层位控制,矿体产于硅化石英岩、石英片岩中,呈层状、似层状大致顺层产出,受后期变质作用及构造挤压影响,矿体沿走向及倾向形成弯曲揉皱,并发生地层与矿层的"倒序"现象。通过变质岩原岩恢复,表明含矿围岩为沉积岩砂岩类,认为矿床成因属砂岩型铜矿床,后经变质及岩浆作用改造富集成矿。

Alaqitudong copper deposit is located in the Langshan metallogenic belt,which is a newly discovered copper deposit in recent years.Through the systematic study of primary geological prospecting data and geochemical analysis means,the geological characteristics of ore deposits and orebodies were analyzed,the genesis of ore deposits was discussed,and prospecting potential was analyzed.It has guiding and reference significance for prospecting in this area and its periphery.Research indicated that the deposit was controlled by the second lithologic section(Jxa2)of Agulugou formation,Zhaertaishan group,mesoproterozoic,orebody in silicified quartzite,quartz schist,alayered,the stratoid roughly bedding stratified output,affected by the late metamorphism and tectonic compression,bending along the strike and the tendency to form ore bodies crumpled,and formation and seam"reverse"phenomenon.Through the restoration of metamorphic rocks,it indicated that the surrounding rocks of the ore-bearing rocks were sedimentary sandstones,and the ore deposit was considered to be a sandstone type copper deposit,which was enriched by metamorphism and magmatic transformation.