Brief Study on the Regional Stratigraphic Division and Coal-bearing Strata in Tibet

According to the tectonic evolution of Tibet, from the entire distribution of tectonic units of the Tibetan Plateau to consider, combined Tibet tectonic units subdivision and coal-bearing strata considered together, this paper divided the Tibet into three large Tectonic-stratigraphy areas: Qiangtang-Sanjiang structural-stratigraphic region, Bangong-Shuanghu-Nujiang structural-stratigraphic region, Gangdese-Himalayan structural-stratigraphic region. From Tibet regional stratigraphic sedimentary structure and its characteristics of ancient fossils combination analysis show that the Tibetan coal-rich region coal accumulation process endowed with the multi-eras, widely distributed, multi-layered seams, thin and poor stability of the overall features. District includes the Lower Carboniferous coal-bearing strata, Upper Permian, Upper Triassic, Middle Jurassic, Lower Cretaceous and Paleogene, etc., the main coal-bearing strata are Lower Carboniferous(Machala coal series), upper Permian(Tuoba coal series), upper Triassic(Tumen coal series), lower Cretaceous(Duoni coal series).