新疆阿尔金塔什达坂地区1∶5万区域地质矿产调查进展

Progress in regional geological and mineral survey of 1∶50000 in Altyn Tashidaban area,Xinjiang

通过在新疆阿尔金塔什达坂地区开展1∶5万区域地质矿产调查,总结了J45E008021、J45E008022、J45E008023三幅区域地质矿产调查取得的进展及主要成果。根据该区岩石组合、变质变形、岩石地球化学及同位素年代学特征,将原阿尔金岩群划分为阿尔金岩群第一岩组和阿尔金岩群第二岩组,重新厘定了金雁山组,将其归属于中元古界蓟县系;将侵入岩划分为4个期次和6个填图单元,并建立了侵入岩年代学格架;厘定了1条区域型韧性剪切带的形成时间下限为中奥陶世;新发现29处矿(化)点,圈定了2个锌矿体和6处成矿远景区。研究成果可为后续找矿工作提供详实的基础地质资料。

Through 1∶50000 regional geological and mineral survey in the Altyn Tashdaban area of Xinjiang,the researchers summarized the progress and main achievements of the regional geological and mineral survey projects of J45E008021,J45E008022 and J45E008023.The Altun Group was divided into the first and the second formations of the Altun Group,and the Jinyanshan Formation was delineated into Jixian System of Middle Proterozoic,according to the characteristics of rock assemblage,metamorphic deformation,rock geochemical and isotopic chronology.The intrusive rocks were redivided into 4 periods and 6 mapping units,and the chronological frameworks of intrusive rocks were established.The lower limit of formation time of a regional ductile shear zone was determined as Middle Ordovician.29 new mineral occurrences were discovered,2 zinc ore bodies and 6 metallogenic prospect areas were delineated.This research would provide detailed basic geological data for the future exploration work in the study area.