Mineralization background and stages of the Mayum gold deposit,Xizang

The Mayum gold deposit in Xizang was generated in the tectonic settings spanning from the subduction and collision of the Yarlung Zangbo oceanic basin to the current tectonism.The ore-forming matter may be derived from the Lower Permian basalts,Late Triassic-Early Cretaceous mantle-derived matter and magmatic rocks of Late Cretaceous or younger,of which the collisional andesite is considered as one of important sources.Three mineralization stages may be separated,including those associated with Paleogene subduction and collision,Miocene post-collisional extension and post-collisional rapid uplifting from the late Pliocene onwards.