Petrogenesis and Tectonic Implications of the Paiku Leucogranites,Northern Himalaya

查看全文 作　　者：Zhengbin [1]Gou;Xin [2]Dong;Baodi [1]Wang

机构地区：[1]Chengdu Center, China Geological Survey,Chengdu 610081, China;[2]Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources,Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

出　　处：《Journal of Earth Science》索引2019年第30卷第3期,共10页

基　　金：supported by the National Natural Science Foundation of China (Nos. 41872070, 41802071, 41773026 and 41303028);the China Geological Survey (No. DD20190053) 摘　　要：The Himalayan leucogranites provide insights into the partial melting behavior of relatively deeper crustal rocks and tectono-magmatic history of the Himalayan Orogen. The Paiku leucogranites of northern Himalaya can be subdivided into two-mica leucogranite(TML), garnet-bearing leucogranite(GL), cordierite-bearing leucogranite(CL), and tourmaline-bearing leucogranite(TL). All of them are high-K, peraluminous, calc-alkalic to alkali-calcic rocks. They are enriched in light rare earth elements(LREE) and large ion lithophile elements(LILE), and show pronounced negative anomalies of Sr, Ba, K and Ti, but positive anomalies of Nb and Rb. LA-ICP-MS U-Pb zircon dating of one TML, one GL, and two CL samples yielded variable 206Pb/238U ages ranging from 23.6 to 16.1 Ma, indicating the Paiku leucogranites underwent a low degree of partial melting process. Combining with previous studies, we suggest the Paiku leucogranites were derived from partial melting of metasedimentary rocks of the Higher Himalayan Sequence(HHS). The GL and TL mainly resulted from the muscovite-dehydration melting, whereas the TML and CL were mainly derived from the biotite-dehydration melting. Finally, it is concluded that the Paiku leucogranites were probably formed during the subduction of the Indian crust. 关键词：Paiku LEUCOGRANITES PETROCHEMISTRY U-Pb geochronology DEHYDRATION melting tectonic implications NORTHERN HIMALAYA

相关文献

参考文献（66）
引证文献（5）
耦合文献（1736）

参考文献(66)

引证文献(5)

耦合文献(1736)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Petrogenesis and Tectonic Implications of the Paiku Leucogranites,Northern Himalaya

参考文献(66)

引证文献(5)

耦合文献(1736)

用户提示