气候变化领域集成服务门户(CCPortal): Episodic magmatism of the Gongga batholith (eastern Tibet) revealed by detrital zircon U-Pb geochronology: Insights into phased Xianshuihe fault activity and plateau growth

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DOI	10.1130/GES02692.1
	Episodic magmatism of the Gongga batholith (eastern Tibet) revealed by detrital zircon U-Pb geochronology: Insights into phased Xianshuihe fault activity and plateau growth
	Zhao, Yanglin; Shen, Xiaoming; He, Zhiyuan; Yuan, Xiaoping; Ge, Yukui; Wang, Shiguang; Wu, Lin; Jia, Yingying; Tang, Xiudang
发表日期	2024
ISSN	1553-040X
英文摘要	Understanding the onset and episodes of magmatism is essential for com-prehending tectonic history, crustal extension, and geodynamic processes. However, due to physical constraints, many places have remained unexplored, which makes it difficult to understand their geological evolution. Following thorough sedimentary provenance analysis, the chronology and periods of magmatism within a drainage area can be revealed through the detrital zircon U-Pb dating method. Here, we present detrital zircon U-Pb ages (n = 1429)obtained from sediments in modern rivers of the Gongga batholith in theeastern Tibetan Plateau. Our results reveal five major magmatic episodessince the early Mesozoic. Three episodes of magmatism occurred in the early to middle Mesozoic (ca. 230-200 Ma, ca. 200-180 Ma, and ca. 180-160 Ma),followed by a protracted period of magmatic quiescence. During the Cenozoic, there were two main periods of magmatism at ca. 50-25 Ma and ca. 25-5 Ma. This is consistent with bedrock geochronological data acquired previously.We propose that the Mesozoic magmatism was most likely caused by post-collisional extension after the closure of the Paleo-Tethys Ocean. The twoCenozoic magmatic episodes are coeval with the progressive intensificationof Xianshuihe fault activity. Consequently, these episodes highlight two signif-icant phases of plateau growth in the eastern Tibetan Plateau: the northward push of the Indian plate and lateral extrusion, which is consistent with the ongoing subduction of the Indian plate beneath the Eurasian plate.
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001203243200001
来源期刊	GEOSPHERE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299027
作者单位	Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Ghent University; China University of Geosciences; China Earthquake Administration; China Earthquake Administration; Chinese Academy of Sciences; Institute of Geology & Geophysics, CAS
推荐引用方式 GB/T 7714	Zhao, Yanglin,Shen, Xiaoming,He, Zhiyuan,et al. Episodic magmatism of the Gongga batholith (eastern Tibet) revealed by detrital zircon U-Pb geochronology: Insights into phased Xianshuihe fault activity and plateau growth[J],2024.
APA	Zhao, Yanglin.,Shen, Xiaoming.,He, Zhiyuan.,Yuan, Xiaoping.,Ge, Yukui.,...&Tang, Xiudang.(2024).Episodic magmatism of the Gongga batholith (eastern Tibet) revealed by detrital zircon U-Pb geochronology: Insights into phased Xianshuihe fault activity and plateau growth.GEOSPHERE.
MLA	Zhao, Yanglin,et al."Episodic magmatism of the Gongga batholith (eastern Tibet) revealed by detrital zircon U-Pb geochronology: Insights into phased Xianshuihe fault activity and plateau growth".GEOSPHERE (2024).