气候变化领域集成服务门户(CCPortal): Assessing the Activity of Eastern Himalayan Extensional Structures: Evidence from Low-Temperature Thermochronology of Granitic Rocks from Yadong

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DOI	10.3390/min14010066
	Assessing the Activity of Eastern Himalayan Extensional Structures: Evidence from Low-Temperature Thermochronology of Granitic Rocks from Yadong
	Xu, Tiankun; Li, Yalin; Stuart, Finlay M.; Ma, Zining; Bi, Wenjun; Jia, Yongyong; Yang, Bo
发表日期	2024
EISSN	2075-163X
起始页码	14
结束页码	1
卷号	14 期号:1
英文摘要	The east-west-trending South Tibetan Detachment System (STDS) and north-south-trending rifts (NSTRs) are the two main types of extensional structures that have developed within the Tibetan Plateau during continent-continent collision since the early Cenozoic. They have played significant roles in the evolution of the plateau, but it is unclear how they are related genetically. In the Yadong area of the eastern Himalaya, the NSTRs cross-cut the STDS. Apatite and zircon fission track ages of a leucogranite pluton in the footwall of the two extensional faults can be used to reconstruct the cooling and exhumation history and thereby constrain the activity of extensional structures. The new AFT ages range from 10.96 +/- 0.70 to 5.68 +/- 0.37 Ma, and the ZFT age is 13.57 +/- 0.61 Ma. Track length distributions are unimodal, albeit negatively skewed, with standard deviations between 1.4 and 2.1 mu m and mean track lengths between 11.6 and 13.4 mu m. In conjunction with previously published datasets, the thermal history of the region is best explained by three distinct pulses of exhumation in the last 16 Ma. The first pulse (16-12 Ma) records a brittle slip on the STDS. The two subsequent pulses are attributed to the movement on the Yadong normal fault. The normal fault initiated at similar to 12 Ma and experienced a pulse of accelerated exhumation between 6.2 and 4.7 Ma, probably reflecting the occurrence of two distinct phases of fault activity within the NSTRs, which were primarily instigated by slab tear of the subducting Indian plate.
英文关键词	southern Tibet; low-temperature thermochronology; pecube; extensional structure; exhumation; Yadong region
语种	英语
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS记录号	WOS:001152418900001
来源期刊	MINERALS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301718
作者单位	China University of Geosciences; Taiyuan University of Technology
推荐引用方式 GB/T 7714	Xu, Tiankun,Li, Yalin,Stuart, Finlay M.,et al. Assessing the Activity of Eastern Himalayan Extensional Structures: Evidence from Low-Temperature Thermochronology of Granitic Rocks from Yadong[J],2024,14(1).
APA	Xu, Tiankun.,Li, Yalin.,Stuart, Finlay M..,Ma, Zining.,Bi, Wenjun.,...&Yang, Bo.(2024).Assessing the Activity of Eastern Himalayan Extensional Structures: Evidence from Low-Temperature Thermochronology of Granitic Rocks from Yadong.MINERALS,14(1).
MLA	Xu, Tiankun,et al."Assessing the Activity of Eastern Himalayan Extensional Structures: Evidence from Low-Temperature Thermochronology of Granitic Rocks from Yadong".MINERALS 14.1(2024).