The Silurian-Devonian granitoids in the East Kunlun orogenic belt, northern Qinghai-Tibetan plateau, China: origin and tectonic implications

doi:10.1007/s12303-021-0017-3

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海极端环境模拟研究实验室

	The Silurian-Devonian granitoids in the East Kunlun orogenic belt, northern Qinghai-Tibetan plateau, China: origin and tectonic implications
	Norbu, Namkha 1,7; Liu, Yuegao 8; Li, Jinchao 2; Jia, Qunzi 2; Wang, Wei 3; Song, Xiaobing 4; Li, Yazhi 2; Kong, Huilei 2; Gao, Yijie 2; Guo, Xianzheng 5
刊名	GEOSCIENCES JOURNAL
	2021-08-04
页码	24
关键词	Qinghai-Tibetan Plateau Proto-Tethys Ocean Wulonggou Bairiqili Lalangmai adakite A-type granite I-type granite
ISSN号	1226-4806
DOI	10.1007/s12303-021-0017-3
英文摘要	The East Kunlun orogenic belt (EKOB) is located in the northeastern part of the Qinghai-Tibetan Plateau, China. Voluminous Silurian-Devonian granitoids were formed during the Proto-Tethys Ocean subduction and collision process. In this study, zircon U-Pb age dating, in-situ Hf isotope analyses, and whole rock major and trace element analyses have been carried out on granitoids from the central to eastern EKOB. The formation ages of granodiorite in the Bairiqili area, the granodiorite in the Wulonggou area are 410 +/- 2 Ma and 396 +/- 1 Ma, respectively, and the granodiorites show I-type features. The Wulonggou syenogranite with a formation age of 398 +/- 2 Ma has a high differentiation index (D.I. = 89.59-92.43), and may belong to the high fractionated I-type granite. The Lalangmai tonalite with a formation age of 423 +/- 2 Ma has high Sr (339-590 mu g/g), epsilon(Hf)(t) (1.5-7.3), and low Y (3.45-6.33 mu g/g), which are similar to modern adakites. The Lalangmai tonalite is the latest adakite record during the Proto-Tethys evolution in EKOB. Combined with previous studies, it is concluded that the granitoids from Cambrian to Devonian divided into four episodes. The first episode (515-436 Ma) mainly consists of I-type island arc granites and adakite, which are formed in a subduction environment. The second episode (436-427 Ma) is characterized by the S-type granites related to the collision. The third episode (427-420 Ma) is the transition period between the collision and the post-collision environment. In the fourth episodes (420-385 Ma), granitoids were formed in post-collision extensional environment, which is characterized by I-type and A-type granites. The upwelling of asthenosphere material is likely caused by the collapse of the orogenic belt. After 420 Ma, I-type and A-type granites formed at different depths but in the same environment.
资助项目	China Geological Survey[DD20160013] ; China Geological Survey[121201011000150005-17] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG2023]
WOS关键词	MAFIC-ULTRAMAFIC COMPLEX ; U-PB GEOCHRONOLOGY ; NI SULFIDE DEPOSIT ; ND-HF ISOTOPES ; ZIRCON U ; WESTERN CHINA ; NW CHINA ; GEOCHEMICAL CHARACTERISTICS ; VOLCANIC-ROCKS ; POSTCOLLISIONAL MAGMATISM
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOCIETY KOREA
WOS记录号	WOS:000681182200001
资助机构	China Geological Survey ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/8795]
专题	深海科学研究部_深海极端环境模拟研究实验室
通讯作者	Liu, Yuegao
作者单位	1.Shaanxi Prov Land Engn Construct Grp, Xian 710075, Peoples R China 2.Xian Ctr China Geol Survey, Xian 710054, Peoples R China 3.Xinjiang Bur Geol & Mineral Explorat & Dev, Geol Party 6, Hami 839000, Peoples R China 4.Geol Survey Gansu Prov, Lanzhou 730000, Peoples R China 5.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China 6.China Chem Geol & Mine Bur, Zhejiang Geol Prospecting Inst, Hangzhou 310002, Peoples R China 7.Changan Univ, Sch Earth Sci & Resources, Xian 710064, Peoples R China 8.Chinese Acad Sci, Inst Deep Sea Sci & Engn, CAS Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Norbu, Namkha,Liu, Yuegao,Li, Jinchao,et al. The Silurian-Devonian granitoids in the East Kunlun orogenic belt, northern Qinghai-Tibetan plateau, China: origin and tectonic implications[J]. GEOSCIENCES JOURNAL,2021:24.
APA	Norbu, Namkha.,Liu, Yuegao.,Li, Jinchao.,Jia, Qunzi.,Wang, Wei.,...&Yao, Xuegang.(2021).The Silurian-Devonian granitoids in the East Kunlun orogenic belt, northern Qinghai-Tibetan plateau, China: origin and tectonic implications.GEOSCIENCES JOURNAL,24.
MLA	Norbu, Namkha,et al."The Silurian-Devonian granitoids in the East Kunlun orogenic belt, northern Qinghai-Tibetan plateau, China: origin and tectonic implications".GEOSCIENCES JOURNAL (2021):24.