气候变化领域集成服务门户(CCPortal): Pre-cenozoic evolution of the northern Qilian Orogen from zircon geochronology: Framework for early growth of the northern Tibetan Plateau

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DOI	10.1016/j.palaeo.2020.110091
	Pre-cenozoic evolution of the northern Qilian Orogen from zircon geochronology: Framework for early growth of the northern Tibetan Plateau
	Li B.; Zuza A.V.; Chen X.; Wang Z.-Z.; Shao Z.; Levy D.A.; Wu C.; Xu S.; Sun Y.
发表日期	2021
ISSN	310182
卷号	562
英文摘要	The northern Qilian Shan, located along the northeastern margin of the Tibetan Plateau, experienced multiple phases of orogeny throughout the Phanerozoic, culminating in fold-thrust and strike-slip deformation associated with the Cenozoic India-Asia collision. Earlier phases of deformation in the Qilian Shan have been severely reactivated or transformed by the most recent Cenozoic strain. To better understand the tectonic evolution of this complex region, we conducted an integrated investigation of field observations, U–Pb dating of igneous and detrital zircons, and a synthesis of previously published data to constrain and reconstruct the pre-Cenozoic history of the northern Qilian Shan. This effort reveals five major age populations important to the history of this region: 2550–2350, 1850–1750, 1050–950, 500–435, and 320–240 Ma. Using this dataset, we identified three major depositional shifts and/or variations in drainage patterns that affected sediment provenance of the northern Qilian Orogen. Observed regional geologic constraints, the magmatic history, and new geophysical observations of the deep structure allow us to propose a coherent tectonic model for the pre-Cenozoic evolution of the northeastern margin of the Tibetan Plateau. (1) Late Neoproterozoic to Cambrian rifting opened the Qilian Ocean. (2) Early Cambrian subduction initiation along the margins of Qaidam and North China–Tarim continents resulted in Cambrian-Ordovician bivergent subduction, arc magmatism within these two continents, and consumption of the Qilian Ocean. (3) Final ocean closure and continental collision occurred at ca. 440 Ma and was associated with syn- and post-orogenic magmatism. (4) Collisional orogeny variably eroded the basement rocks, reorganized drainage networks, and altered sedimentary provenance for the lower Paleozoic to upper Paleozoic deposits. (5) Mesozoic extension led to the development of thick Jurassic–Cretaceous terrestrial basins. This pre-Cenozoic history resulted in preexisting weaknesses and/or low-friction detachment horizons that played a decisive role in controlling the pattern, distribution, and timing of Cenozoic deformation across the northern Tibetan Plateau. © 2020
英文关键词	Basin development; Orogenic plateau; Sediment provenance analysis; Tectonic history; U–Pb zircon dating
语种	英语
scopus关键词	Palaeogeography; Palaeoclimatology; Palaeoecology
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/158317
作者单位	Chinese Academy of Geological Sciences; Beijing; 100037; China; Sinoprobe Center; Chinese Academy of Geological Sciences and China Geological Survey; Beijing; 100037; China; Nevada Bureau of Mines and Geology; University of Nevada; Reno; Nevada; 89557; United States; Key laboratory of Continental Collision and Plateau Uplift; Institute of Tibetan Plateau Research; Center for Excellence in Tibetan Plateau Earth Sciences; Chinese Academy of Sciences; Beijing; 100101; China
推荐引用方式 GB/T 7714	Li B.,Zuza A.V.,Chen X.,et al. Pre-cenozoic evolution of the northern Qilian Orogen from zircon geochronology: Framework for early growth of the northern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,562.
APA	Li B..,Zuza A.V..,Chen X..,Wang Z.-Z..,Shao Z..,...&Sun Y..(2021).Pre-cenozoic evolution of the northern Qilian Orogen from zircon geochronology: Framework for early growth of the northern Tibetan Plateau.,562.
MLA	Li B.,et al."Pre-cenozoic evolution of the northern Qilian Orogen from zircon geochronology: Framework for early growth of the northern Tibetan Plateau".562(2021).