白云鄂博位于绥远之西北,包头之北北东约一七○公里之蒙古高原上,附近为极缓之波状丘陵,地质主要由结晶质石灰岩,变质矽质页岩,片状石英岩及黑云母花岗岩所成,前三者 Bayan Obo is located in the northwest of Suiyuan, about 170 km north-east of Baotou on the Mongolian Plateau, near the extremely gentle wavy hills, mainly composed of crystalline geological limestone, metamorphic silicon shale, flaky quartzite and black Mica into granite, the first three