The Tibetan Plateau is located in the east part of the Tethys realm which is the largest oil and gas accumulation region of the world.The Gangba Basin, located on the south of Tibetan Plateau,is a Mesozoic marine petroliferous basin covering an area of 7000 km2.The basin has been received little hydrocarbon interest for its severe climate and life conditions.The Upper Jurassic siliciclastics in Gangba Basin named