Sequential melting of deep crustal sources in a rift system: An example from the Southern Tibet

Abstract

How the continental crust responds geochemically to progressive extension is one of the interesting questions. The Southern Tibet Rift System (STRS) is one of the active extensional structures. The Yardoi gneiss dome, located within STRS, consists of at least four suites of Miocene granites. As crystallization ages become younger, they are characterized by decrease in ?Nd(t) and Sr/Y, but increase in 87Sr/86Sr(t) and Rb/Sr. Such temporal trends could be explained by sequential partial melting of