U-Pb dating and geochemistry of diorite in the eastern section from eastern Kunlun middle uplifted basement and granitic belt
东昆中隆起带东段闪长岩U-Pb年代学和岩石地球化学研究

Studies of petrology and geochemistry indicate the high-K calc-alkaline diorite groups are located in the eastern section from eastern Kunlun middle uplifted basement and granitic belt. This suite of dioritic rocks are enriched in LILE (such as K, Ba, Rb), LREE and more mobile incompatible elements (such as Th, U), relatively depleting in HFSE (such as Nb, Ta, Ti, P), similar to the characteristics of Andean-type active continental margin magma. It is suggested that a mixture, between basaltic magma derived from partial melting of metasomatized mantle and acidic magma derived from crustal material, produces the dioritic magma. LA-ICP-MS zircon U-Pb dating shows that the diorite in the Asiha intrusions was formed at ~244Ma, which in Early Indosinian period.