气候变化领域集成服务门户(CCPortal): Late Cretaceous-early Paleogene rise of the Gangdese magmatic arc (south Tibet) from sea level to high mountains

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DOI	10.1130/B36438.1
	Late Cretaceous-early Paleogene rise of the Gangdese magmatic arc (south Tibet) from sea level to high mountains
	Xu, Qiang; Ding, Lin; Cao, Yu; Cai, Fulong; Li, Shun; Tan, Xiucheng; Kershaw, Stephen; Tang, Hao
发表日期	2023
ISSN	0016-7606
EISSN	1943-2674
起始页码	1939
结束页码	1954
卷号	135 期号:7-8
英文摘要	Recognition of the existence of an Andean -type continental margin in southern Tibet prior to its collision with India has provided crucial constraints on the formation of the Ti-betan Plateau and South Asian climate evo-lution. Here, we focused on well-dated Late Cretaceous successions in the Linzhou Basin and determined the elevation changes from sea level to high mountains in the Gangdese magmatic arc in southern Tibet. Our results show that the Linzhou Basin was still sub-merged in the Tethyan Sea at around 92 Ma when it accumulated Cenomanian (ca. 105- 92 Ma) shallow-marine orbitolinid-bearing limestones (Takena Formation); these lime-stones are unconformably overlain by Cam-panian (83-78 Ma) fluvial-lacustrine deposits (Shexing Formation) after an -9 m.y. deposi-tional hiatus. A prominent unconformity be-tween the tightly folded Shexing Formation and gently tilted overlying Paleocene-Eocene Linzizong successions represents the forma-tion of the regional Lhasaplano ca. 70 Ma, which may have been linked to the rise of an Andean-type Gangdese mountain range along the southern margin of the Lhasa ter-rane. Using carbonate oxygen isotope and clumped isotope thermometry data from the Shexing Formation paleosols, we quantita-tively documented the rise of the Andean -type Gangdese Mountains with a peneplain surface at an elevation of 2.7 + 0.5/-0.9 km above sea level prior to onset of the India -Asia collision ca. 65-63 Ma. This scenario of surface gain may have been an isostatic com-pensation response to the crust thickening to over 50 km during the Late Cretaceous. Sub-sequently, the surface isostatically rose to its near-present elevation of -4.6 km due to the removal of overthickened mantle lithosphere and revival of intense Gangdese magmatism by 56 Ma.
英文关键词	INDIA-ASIA COLLISION; XIGAZE FORE-ARC; CLUMPED ISOTOPE; LHASA TERRANE; BASIN EVOLUTION; U-PB; PLATEAU; PALEOALTIMETRY; MONSOON; ZIRCON
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:001051785100004
来源期刊	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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/283102
作者单位	Southwest Petroleum University; Southwest Petroleum University; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Shanghai Jiao Tong University; Brunel University; Natural History Museum London
推荐引用方式 GB/T 7714	Xu, Qiang,Ding, Lin,Cao, Yu,et al. Late Cretaceous-early Paleogene rise of the Gangdese magmatic arc (south Tibet) from sea level to high mountains[J]. 中国科学院青藏高原研究所,2023,135(7-8).
APA	Xu, Qiang.,Ding, Lin.,Cao, Yu.,Cai, Fulong.,Li, Shun.,...&Tang, Hao.(2023).Late Cretaceous-early Paleogene rise of the Gangdese magmatic arc (south Tibet) from sea level to high mountains.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(7-8).
MLA	Xu, Qiang,et al."Late Cretaceous-early Paleogene rise of the Gangdese magmatic arc (south Tibet) from sea level to high mountains".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.7-8(2023).