论文部分内容阅读
白云鄂博矿区位于中国地台北部边缘,北邻天山-大兴安岭海西褶皱带,南倚内蒙台背斜. 矿区出露最老地层为上太古界二道洼群,由绿色片岩(绿泥石片岩、绿泥石英片岩、黑云母绿泥石片岩)、石英岩、二云片岩、角闪斜长片麻岩和大理岩等组成,变质较深,主要分布在矿区东部.其年龄(K-Ar)约在16.67～23.52亿年,相当于五台群. 元古界白云鄂博群不整合于二道洼群之上,主要由石英岩、板岩、千枚岩、白云质大理岩、结晶白云岩等海相沉积浅变质岩系组成.总厚度大于9000米,共分九个岩组,二十个岩段,矿区
The Bayan Obo mine is located on the northern edge of China’s platform and borders the Hercynian fold belt of the Tianshan-Daxingan Mountains in the north and the Inner-Mongolia platform anticline in the south. The oldest strata exposed in the mine area is the Upper Archean Erdauwa Formation, consisting of green schist (chlorite schist) , Chlorite quartz schist, biotite chlorite schist), quartzite, dolomite, hornblende plagioclase gneiss and marble, with a deeper metamorphism and mainly distributed in the eastern part of the mining area.The age (K-Ar ) Is about 16.67 ~ 23.52 billion years, which is equivalent to Wutai Group.The Proterozoic of the Bayan Obo Group is unconformable over the Erdaowan Group and consists of quartzite, slate, phyllite, dolomitic marble, crystalline white clouds Rock and other marine sedimentary super-metamorphic rocks. The total thickness of more than 9000 meters, is divided into nine rock group, twenty rock, mining area