The geochemical features and its genesis of the trace and REE of the Wenquan magma mixing granite in wester Qinling

The Wenquan granite,which lies in the western Qinling originates,is the product of the magma mixing of crust and mantlemagmas.The host rocks are characterized by higher hypothermal metallogenic elements suchas Mo,Sn,Bi and Was well as siderophile elements Co,Ni and Cr etc.The basic mafic magmatic enclave and basic dyke are rich in LREE and lithophile elements such as Ba,Rb,Sr,Zr,Th,Hf and Nb,but have poorer siderophile elements.The abnormal distribution of the trace elements indicates the noticeably exchanging and complying between the two terminal elements.The ratio of LREE HREE is 10-15 in host rocks,but is 9.98-13.5 in basic parts because of the magm as magm a mixing,namely,they abnormally enrich the LREE.The ratio of the δEu,(La/Sm)_N as well as (La/Yb)_N all indicate that this rockbody is amigmatized one,and the intensively migmatized monzonitic granite shows the markable transition between crust and mantle.