globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2020.228712
论文题名:
Oroclinal buckling and associated lithospheric-scale material flow – insights from physical modelling: Implication for the Mongol-Hingan orocline
作者: Krýza O.; Lexa O.; Schulmann K.; Guy A.; Gapais D.; Cosgrove J.; Xiao W.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 800
语种: 英语
中文关键词: Analogue modelling ; Hingan orocline ; Mongolian orocline ; Oroclinal buckling
英文关键词: Buckling ; Deformation ; Analogue modelling ; Brittle deformation ; Central Asian orogenic belt ; Deep crustal structures ; Deformation distributions ; Deformation pattern ; Lithospheric domains ; Surface deformation ; Structural geology ; analog model ; brittle deformation ; buckling ; crustal structure ; lithospheric structure ; material flow analysis ; modeling ; orogenic belt ; upper crust ; Mongolia
英文摘要: We present a new analogue model of oroclinal buckling, which is based on recent advances in our geological understanding of the Mongolian orocline in the Central Asian Orogenic Belt. The model simulates an amplification of a preexisting, gently arcuated accretionary system. In the analogue models, we established three neighboring subdomains that represent contrasting lithospheric domains separated by a steep “subduction” interface. The shortening of the model is parallel to the pseudo-linear interface between these subdomains and produces two different deformation patterns in the amplified interlimb areas of the orocline. We used analogue modelling techniques to investigate both the flow of a ductile lithosphere and the brittle deformation of an upper crust that is associated with the development of an orocline. The modelling results show that: (1) two types of regional-scale folds develop both of which are upright. The largest are steeply plunging oroclines and the smaller have sub-horizontal axes; (2) the overall deformation distribution displays significant thickening/thinning and exhumation of the lower ductile layers with variations of upward transfer of crustal material; (3) the hinge regions of the two adjacent oroclines studied consist of different materials, one contains oceanic and the other felsic lower crustal rocks. It is found that the geometry of the lithosphere beneath the two regions is very different; (4) the geometry of the orocline is non-cylindrical and exhibits an increasing plunge of fold axes when traced from the upper-crust to deeper lithospheric layers. The resulting model is used to geophysically constrain deep crustal structures and surface deformation patterns in Mongolia. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170831
Appears in Collections:气候变化与战略

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作者单位: Institute of Petrology and Structural Geology, Charles University, Albertov 6, 128 43, Czech Republic; Institute of Geophysics, Czech Academy of Sciences, Boční II/1401, Prague 4, 141 31, Czech Republic; Czech Geological Survey, Center for Lithosphere Research, Klárov 3, Prague 1, 118 21, Czech Republic; Institut de Physique du Globe de Strasbourg – CNRS UMR7516, Université de Strasbourg, France; Géosciences Rennes, UMR 6118 CNRS, Université de Rennes 1, Rennes Cedex, 35042, France; Department of Earth Sciences and Engineering, Imperial College London, Prince Consort RoadSW7 2AZ, United Kingdom; Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang, 830011, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China

Recommended Citation:
Krýza O.,Lexa O.,Schulmann K.,et al. Oroclinal buckling and associated lithospheric-scale material flow – insights from physical modelling: Implication for the Mongol-Hingan orocline[J]. Tectonophysics,2021-01-01,800
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