气候变化领域集成服务门户(CCPortal): Early Triassic initial collision between the North China and South China blocks in the eastern Qinling Orogenic Belt

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DOI	10.1016/j.tecto.2021.228965
	Early Triassic initial collision between the North China and South China blocks in the eastern Qinling Orogenic Belt
	Ma Q.; Yang J.; Du Y.; Dai X.; Chai R.; Guo H.; Xu Y.
发表日期	2021
ISSN	00401951
卷号	814
英文摘要	The closure of Mianlue Ocean lead to the collisional assembly between the North China Block (NCB) and the South China Block (SCB). But the timing of initial continental collision remains unclear, with the proposed ages ranging from the Late Permian to the Late Triassic. This study presents stratigraphic, sedimentological, tectonic subsidence, and provenance data from the Triassic strata in the Zigui and Dangyang basins lying along the eastern Qinling Orogenic Belt. These data document a tectonic transition in the central northern-SCB, and locally provide constraints on the timing of initial SCB–NCB collision. The Lower Triassic Daye Formation was deposited in a marginal basin to slope environment, and consists of mudrocks containing detrital zircons with major age peaks at ca. 1900 and 850 Ma. The overlying Lower Triassic Jialingjiang Formation comprises a shallowing carbonate sequence, with intercalated evaporites at the top of the formation. It contains mudrocks that are rich in detrital zircons with of ca. 270‐–245 Ma. The mixed carbonate and siliciclastic sequences of the Middle–Upper Triassic Badong Formation records tectonic uplift at its base, and contains detrital zircons with U[sbnd]Pb age peaks at ca. 2500, 1850, 920–800, 450 and 350–220 Ma. Combined with petrographical observations and tectonic subsidence calculation, these detrital zircon U[sbnd]Pb ages record a significant provenance change from recycled material derived from the SCB to newly generated detrital material from the NCB. This provenance change records the initial SCB–NCB collision in the eastern Qinling Orogenic Belt during the Early Triassic. © 2021 Elsevier B.V.
关键词	Continental collision Mesozoic Qinling Orogenic Belt Sedimentary provenance South China
英文关键词	Silicate minerals; Stratigraphy; Subsidence; Zircon; Continental collisions; Jialingjiang formation; North China blocks; Qinling orogenic belts; Recycled materials; Slope environments; South China block; Tectonic uplift; Tectonics; collision zone; continental collision; orogenic belt; Permian-Triassic boundary; petrography; plate motion; plate tectonics; provenance; tectonic setting; Triassic; China; North China Block; Qinling Belt; South China Block
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208023
作者单位	State Key Laboratory of Biogeology and Environmental Geology & School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China
推荐引用方式 GB/T 7714	Ma Q.,Yang J.,Du Y.,et al. Early Triassic initial collision between the North China and South China blocks in the eastern Qinling Orogenic Belt[J],2021,814.
APA	Ma Q..,Yang J..,Du Y..,Dai X..,Chai R..,...&Xu Y..(2021).Early Triassic initial collision between the North China and South China blocks in the eastern Qinling Orogenic Belt.Tectonophysics,814.
MLA	Ma Q.,et al."Early Triassic initial collision between the North China and South China blocks in the eastern Qinling Orogenic Belt".Tectonophysics 814(2021).