Yanshanian Orogeny During North China's Drifting Away From the Trench: Implications of Numerical Models

Ting,Yang1,2,3; Shaofeng Liu2; Peng Guo1; Wei Leng4; An Yang5

2020-11-30

10.1029/2020TC006350

TECTONICS   影响因子和分区

0278-7407

1944-9194

Tectonics in North China and adjacent areas were dominated by the Pacific Plate subduction since the Jurassic. Although the extension-dominated tectonics in North China since the Early Cretaceous can be well explained by the Pacific Plate subduction, it is still not well understood why North China and adjacent areas underwent intense compression (Yanshanian orogeny) during the Late Jurassic and why these regions rapidly switched to extension-dominated tectonics during the Early Cretaceous. Plate reconstructions suggest that East Asia was moving rapidly in the direction opposite the trench during the Jurassic when North China was undergoing strong compressional deformation. This relationship between back-arc deformation and overriding plate's motion seems to contradict previous compilations and geodynamic models. We suggest that large-scale mantle convection and exotic terrane accretions along the East Asian margin have jointly contributed to the Yanshanian orogeny across North China during the Jurassic. We verify this hypothesis with numerical geodynamic models. Our numerical experiments also suggest that large-scale downwelling mantle flow beneath Asia has promoted continued subduction beneath the Asian margin despite the subduction was often punctuated by collisional and accretionary events.

North China large‐ scale mantle flow slab subduction terrane accretion overriding plate deformation Yanshanian orogeny

SCI ; EI

英语

第一 ; 通讯

NSFC[41904088,41804086,41820104004] ; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences[GPMR201819] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDSYS20190902093007855] ; National Key R D Plan["2017YFC0601405","2018YFE0204204"]

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000603666700009

American Geophysical Union (AGU)

20205309696809

Numerical models ; Deformation ; Geodynamics

Geology:481.1 ; Geophysics:481.3 ; Mathematics:921

GEOSCIENCES

人工提交

1.Department of Earth and Space Sciences, Southern University of Science and Technology, Shenzhen, China
2.State Key Laboratory of Geological Processes and Mineral Resources and School of Geosciences and Resources, China University of Geosciences, Beijing, China,
3.Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology, Southern University of Science and Technology, Shenzhen, China
4.Laboratory of Seismology and Physics of Earth's Interior; School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China
5.Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China

Ting,Yang,Shaofeng Liu,Peng Guo,et al. Yanshanian Orogeny During North China's Drifting Away From the Trench: Implications of Numerical Models[J]. TECTONICS,2020,39(12).

Ting,Yang,Shaofeng Liu,Peng Guo,Wei Leng,&An Yang.(2020).Yanshanian Orogeny During North China's Drifting Away From the Trench: Implications of Numerical Models.TECTONICS,39(12).

Ting,Yang,et al."Yanshanian Orogeny During North China's Drifting Away From the Trench: Implications of Numerical Models".TECTONICS 39.12(2020).