Insights into the origin of purely sediment-derived Himalayan leucogranites:Si-O isotopic constraints  

作　　者：Xiaochi Liu Xianhua Li Yu Liu Lei Yang Qiuli Li Fuyuan Wu Huimin Yu Fang Huang 

机构地区：[1]State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences [2]College of Earth and Planetary Sciences, University of Chinese Academy of Sciences [3]CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China

出　　处：《Science Bulletin》2018年第19期1243-1245,共3页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China(41772058 and 41402055)

摘　　要：Granite is the dominant rock type in Earth’s continental crust.The origin of granite can be directly or indirectly related to the fractional crystallization of mantle-derived basaltic melt or the reworking of pre-existing continental or oceanic crust, which contribute to the growth of continental crust. Among the various types of granites, the peraluminous leucogranites in the Himalayan orogen, which are high in SiO_2(>73%) and low in mafic minerals (<5%),Granite is the dominant rock type in Earth＇s continental crust. The origin of granite can be directly or indirectly related to the fractional crystallization of mantle-derived basaltic melt or the reworking of pre-existing continental or oceanic crust, which con- tribute to the growth of continental crust.

关 键 词：起源 同位素 沉积 岩石类型 花岗石 外壳 大陆 玄武岩 

分 类 号：P588.121[天文地球—岩石学]