Geological Characteristics of Igneous Rocks Distributed in Gansu Section of Subnorth Belt of BeishanMountain Located in Border of Gansu-Xinjinag-Mongolia
///Survey area lies in Subei County of Gansu Privince, tectonicaly belongs to Sidingbishan-Queershan magatic arc belt in Paleozoic which situated on the east-south margin of Kazabstan paleoplate. It tends to nearly east-west direction. Its material compositions there are the Paleozoic strata, the intrusive rocks in Triassic and Carboniferous, and the main fault in the north of Sidingbishanshuang goushan. The intrusive rocks include Triassic Xiaocaohu superunit and manshan superunit, Paleozoic Ganheliang superunit, Carboniferous-Paleozoic Sidinghishan sequences, Shuarggoushan sequences and Dayushan sequences, Carboniferous, Sidinghishan basic-ultrabasic rocks.