Diachronous Cretaceous Closure of the Bangong-Nujiang-Shyok Ocean (Westernmost Central Tibet)

doi:10.1029/2024TC008280

NIGPAS OpenIR

	Diachronous Cretaceous Closure of the Bangong-Nujiang-Shyok Ocean (Westernmost Central Tibet)
通讯作者	Hu, Xiumian(huxm@nju.edu.cn)
	Ma, Anlin 1; Hu, Xiumian 1; Garzanti, Eduardo 2; Xue, Weiwei 1; Schlagintweit, Felix 3; Xu, Yiwei 4; Lai, Wen 1
	2024-12-01
发表期刊	TECTONICS (IF:3.583[JCR-2017],4.349[5-Year])
ISSN	0278-7407
卷号	43 期号:12 页码:20
摘要	Precisely reconstructing the diachroneity of continental collision along various Paleo-, Meso-, and Neo-Tethyan branches has proved to be challenging, which limited our understanding of the dynamics of terrane suturing and associated topographic inheritance in the Tibetan Plateau. In this study, we present stratigraphic and sedimentological evidence to support, for the first time, the presence of a late Early Cretaceous remnant deep-water basin active at least until 110 Ma in the westernmost Bangong-Nujiang suture in central Tibet. This basin was confined by shallow-marine deposition in the north, east, and southeast, as indicated by obitolinid biostratigraphy and maximum depositional ages for six lithostratigraphic units, while the corresponding ocean had already closed in the east by Aptian-Albian time. Detrital zircon U-Pb age data (n = 965), forward numerical mixture modeling, and in situ epsilon Hf(t) values point at syn-collisional magmatic rocks along strike in the east as the main sediment source, with additional variable input from uplifted Jurassic-lowermost Cretaceous turbidites. Our paleogeographic reconstruction indicates that the closure of the Bangong-Nujiang Ocean progressed markedly diachronously from east to west, culminating in the final closure of the Shyok oceanic branch during the Late Cretaceous (probably by 95 and no later than 85 Ma). This westward-younging ocean closure corresponds to a shorter duration of continental convergence in the west, resulting in less crustal shortening and tectonic uplift than in the east. This may have played a pivotal role in shaping Cenozoic topography, characterized by higher elevations in the east compared to the west along the Bangong-Nujiang-suture valley.
关键词	Tibet uplift Tethyan evolution detrital zircon deep-water gravity flow orbitolinid rudist
DOI	10.1029/2024TC008280
收录类别	SCI
语种	英语
关键词[WOS]	NORTHERN LHASA TERRANE ; XIGAZE FORE-ARC ; TETHYAN OCEAN ; DEPOSITIONAL SYSTEMS ; CONTINENT COLLISION ; AGE CONSTRAINTS ; BASIN EVOLUTION ; SOUTHERN TIBET ; GEOCHRONOLOGY ; MIDDLE
资助项目	Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China[42372126] ; China Postdoctoral Science Fund-Special Fund[2024T170395] ; Yuxiu Young Scholars Program of Nanjing University ; Jiangsu Funding Program for Excellent Postdoctoral Talent[2022ZB14] ; [2019QZKK0204]
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:001370251500001
项目资助者	Second Tibetan Plateau Scientific Expedition and Research Program ; National Natural Science Foundation of China ; China Postdoctoral Science Fund-Special Fund ; Yuxiu Young Scholars Program of Nanjing University ; Jiangsu Funding Program for Excellent Postdoctoral Talent
出版者	AMER GEOPHYSICAL UNION
文献类型	期刊论文
条目标识符	http://ir.nigpas.ac.cn/handle/332004/44658
专题	中国科学院南京地质古生物研究所
通讯作者	Hu, Xiumian
作者单位	1.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res, Nanjing, Peoples R China 2.Univ Milano Bicocca, Dept Earth & Environm Sci, Milan, Italy 3.Lerchenauerstr 167, D-80935 Munich, Germany 4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
推荐引用方式 GB/T 7714	Ma, Anlin,Hu, Xiumian,Garzanti, Eduardo,et al. Diachronous Cretaceous Closure of the Bangong-Nujiang-Shyok Ocean (Westernmost Central Tibet)[J]. TECTONICS,2024,43(12):20.
APA	Ma, Anlin.,Hu, Xiumian.,Garzanti, Eduardo.,Xue, Weiwei.,Schlagintweit, Felix.,...&Lai, Wen.(2024).Diachronous Cretaceous Closure of the Bangong-Nujiang-Shyok Ocean (Westernmost Central Tibet).TECTONICS,43(12),20.
MLA	Ma, Anlin,et al."Diachronous Cretaceous Closure of the Bangong-Nujiang-Shyok Ocean (Westernmost Central Tibet)".TECTONICS 43.12(2024):20.