 In this model, the Lhasa tectonic block, equivalent to the southern Tibet, experienced initial uplift due to compressional force created when the Indian and Asian continent collided and the Tethys oceanic slab broke off (45—30 Ma).This is supported by the presence of Adakite in the Lhasa block.Adakite is an intermediate to felsic rock which is commonly related to oceanic subduction.