气候变化领域集成服务门户(CCPortal): Insights into the dynamics of an orogenic wedge from lubrication theory: Implications for the Himalayan tectonics

CCPortal

DOI	10.1016/j.tecto.2020.228335
	Insights into the dynamics of an orogenic wedge from lubrication theory: Implications for the Himalayan tectonics
	Maiti G.; Mandal N.; Misra S.
发表日期	2020
ISSN	00401951
卷号	776
英文摘要	Using lubrication theory, we develop a mechanical model to evaluate the dynamic relation between an orogenic wedge and the overriding plate. The model suggests that the subducting plate motion produces a dynamic pressure in the wedge, which supports the gravity load of the overriding plate lying above it (stable condition). A drop in the dynamic pressure results in a rotational collapse of the overriding plate (unstable condition). We present an analytical solution to provide an estimate of the dynamic pressures in orogenic wedges. The lubrication model is also implemented in computational fluid dynamics (CFD) simulations to perform real scale numerical experiments, considering mainly three variables: 1) plate convergence angle (α), 2) subduction rate (us), and 3) viscosity ratio (R) between the overriding plate and wedge. The overriding plates attain mechanical stability when us exceeds a threshold value (us ∗); otherwise, they become unstable as us
关键词	CFD simulations Channel flow in the Himalaya Collision tectonics Orogenic wedges Overriding plate collapse
英文关键词	Channel flow; Computation theory; Computational fluid dynamics; Mechanical stability; Tectonics; CFD simulations; Computational fluid dynamics simulations; Himalayas; Kinematic transformations; Numerical experiments; Orogenic wedge; Overriding plate collapse; Unstable conditions; Lubrication; channel flow; computational fluid dynamics; numerical model; plate tectonics; subduction; tectonic evolution; tectonic setting; viscosity
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/207820
作者单位	Department of Geological Sciences, Jadavpur University, Kolkata, 700032, India; Department of Earth Sciences, Indian Institute of Technology, Kanpur, India
推荐引用方式 GB/T 7714	Maiti G.,Mandal N.,Misra S.. Insights into the dynamics of an orogenic wedge from lubrication theory: Implications for the Himalayan tectonics[J],2020,776.
APA	Maiti G.,Mandal N.,&Misra S..(2020).Insights into the dynamics of an orogenic wedge from lubrication theory: Implications for the Himalayan tectonics.Tectonophysics,776.
MLA	Maiti G.,et al."Insights into the dynamics of an orogenic wedge from lubrication theory: Implications for the Himalayan tectonics".Tectonophysics 776(2020).