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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
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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). |
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