We are very grateful to Postdoctoral fellow Dai Zuowen from Beijing University of science and technology Associate Research Fellow Cao Huawen, Associate Research Fellow Zhang Zhi, Senior Engineer Ouyang Yuan, Senior Engineer Ma Guotao and Senior Engineer Zhang Hai from Chengdu Center, China Geological Survey, Research Fellow Ma Xudong from Institute of Mineral Resources, Chinese Academy of Geological Sciences, Dr. Li Tong from the Chengdu University of Technology, Master Wu Junyi from the China University of Geosciences, for their great help and advice for improvement of this paper. This study was financially supported in part by the National Key Research and Development Program of China (Grant Nos: 2021YFC2901803; 2021YFC2901903; 2019YFC0605201); and the International Scientific Plan of the Qinghai-Xizang (Tibet) Plateau of Chengdu Center, China Geological Survey.
Cretaceous magmatism is widely distributed on both sides of the Bangong–Nujiang suture zone (BNSZ). These rocks record the subduction to closure history of the Bangong–Nujiang Tethys Ocean (BNO) and the collisional history between the Lhasa (LS) and Qiangtang (QT) terranes. The Xiabie Co granite in Nyima County, which located on the southern margin of the QT terrane, Tibet. In this study, whole-rock geochemistry; Rb-Sr, Sm-Nd, and Pb isotopes; and laser ablation inductively coupled mass spectrometry (LA-ICP-MS) zircon U-Pb ages and Lu-Hf isotopes of the Xiabie Co granite in the Nyima area have been studied to constrain its petrogenesis and tectonic setting. Our study can help explain the tectonic evolution of the BNSZ and crust-mantle interaction. Zircon U-Pb dating indicates that the granite was emplaced at ca. 120 Ma. The granite contains a small amount of hornblende and has high silicon (SiO2 = 73.97–78.03 wt%).
LIU Hong, LI Youguo, LI Wenchang, LI Guangming, HUANG Hanxiao, MA Dongfang, HUANG Yong, ZHOU Qing, FU Jiangang.2022. Petrogenesis of an Early Cretaceous Xiabie Co I-type Granite in Southern Qiangtang, Tibet: Evidence from Geochemistry, Geochronology, Rb-Sr, Sm-Nd, Lu-Hf and Pb isotopes[J]. Acta Geologica Sinica(),96(3):919-937Copy