Tectonic Evolution in Qiangtang Basin of Northern Tibet

The Tectonic evolution of Qan Tang basin is expounded by means of studying magmatite,Layer distribution law, and sedimentary formation, with showing different type of basin made in different stage of evolution. And then, suggest that Qan Tang basin was passive continental margins basin during the Early Permian, and it changed from passive continental margins basin to back-arc basin between Early and Middle Triassic,with forming back-arc basin during Late Triassic. It Changed from back-arc basin to foreland basin during Early Jurassic, with forming the foreland basin between Middle and Late Jurassic. During Cretaceous and Quaternary it changed into the mountain front basin.