气候变化领域集成服务门户(CCPortal): Limited underthrusting of India below Tibet: He-3/He-4 analysis of thermal springs locates the mantle suture in continental collision

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DOI	10.1073/pnas.2113877119
	Limited underthrusting of India below Tibet: He-3/He-4 analysis of thermal springs locates the mantle suture in continental collision
	Klemperer, Simon L.; Zhao, Ping; Whyte, Colin J.; Darrah, Thomas H.; Crossey, Laura J.; Karlstrom, Karl E.; Liu, Tianze; Winn, Carmen; Hilton, David R.; Ding, Lin
通讯作者	Klemperer, SL (通讯作者)
发表日期	2022
ISSN	0027-8424
EISSN	1091-6490
卷号	119 期号:12
英文摘要	During continent-continent collision, does the downgoing continental plate underplate far inboard of the collisional boundary or does it subduct steeply into the mantle, and how is this geometry manifested in the mantle flow field? We test conflicting models for these questions for Earth's archetypal continental collision forming the Himalaya and Tibetan Plateau. Air-corrected helium isotope data (He-3/He-4) from 225 geother-mal springs (196 from our group, 29 from the literature) delineate a boundary separat -ing a Himalayan domain of only crustal helium from a Tibetan domain with significant mantle helium. This 1,000-km-long boundary is located close to the Yarlung-Zangbo Suture (YZS) in southern Tibet from 80 to 92 degrees E and is interpreted to overlie the mantle suture where cold underplated Indian lithosphere is juxtaposed at >80 km depth against a sub-Tibetan incipiently molten asthenospheric mantle wedge. In south-eastern Tibet, the mantle suture lies 100 km south of the YZS, implying delamination of the mantle lithosphere from the Indian crust. This helium-isotopic boundary helps resolve multiple, mutually conflicting seismological interpretations. Our synthesis of the combined data locates the northern limit of Indian underplating beneath Tibet, where the Indian plate bends to steeper dips or breaks off beneath a (likely thin) asthenospheric wedge below Tibetan crust, thereby defining limited underthrusting for the Tibetan continental collision.
关键词	NOBLE-GAS LITHOSPHERE BENEATH LOWER CRUST CONSTRAINTS SUBDUCTION HYDROCARBON ZONE PROPAGATION HIMALAYA PLATEAU
英文关键词	continental collision; Tibetan plateau; mantle helium; structural seismology; Indian lithosphere
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000775488100012
来源期刊	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260757
推荐引用方式 GB/T 7714	Klemperer, Simon L.,Zhao, Ping,Whyte, Colin J.,et al. Limited underthrusting of India below Tibet: He-3/He-4 analysis of thermal springs locates the mantle suture in continental collision[J]. 中国科学院青藏高原研究所,2022,119(12).
APA	Klemperer, Simon L..,Zhao, Ping.,Whyte, Colin J..,Darrah, Thomas H..,Crossey, Laura J..,...&Ding, Lin.(2022).Limited underthrusting of India below Tibet: He-3/He-4 analysis of thermal springs locates the mantle suture in continental collision.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,119(12).
MLA	Klemperer, Simon L.,et al."Limited underthrusting of India below Tibet: He-3/He-4 analysis of thermal springs locates the mantle suture in continental collision".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 119.12(2022).