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DOI	10.1016/j.epsl.2019.115962
	Evolution of cratons through the ages: A time-dependent study
	Paul J.; Ghosh A.
发表日期	2020
ISSN	0012821X
卷号	531
英文摘要	The viscosity of cratons is key to understanding their long term survival. In this study, we present a time-dependent, full spherical, three dimensional mantle convection model to investigate the evolution of cratons of different viscosities. The models are initiated from 409 Ma and run forward in time till the present-day. We impose a surface velocity boundary condition, derived from plate tectonic reconstruction, to drive mantle convection in our models. Cratons of different viscosities evolve accordingly with the changing velocity field from their original locations. Along with the viscosity of cratons, the viscosity of the asthenosphere also plays an important role in cratons' long term survival. Our results predict that for the long-term survival of cratons they need to be at least 100 times more viscous than their surroundings and the asthenosphere needs to have a viscosity of the order of 1020 Pa-s or more. © 2019 Elsevier B.V.
关键词	cratons mantle convection numerical modeling study of deep earth interior
英文关键词	Numerical models; Velocity; cratons; Deep earths; Mantle convection; Mantle convection models; Surface velocity; Time dependent; Velocity field; Viscosity; asthenosphere; boundary condition; craton; mantle convection; numerical model; plate tectonics; reconstruction; viscosity
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202825
作者单位	Centre for Earth Sciences, Indian Institute of Science, Bangalore, 560012, India
推荐引用方式 GB/T 7714	Paul J.,Ghosh A.. Evolution of cratons through the ages: A time-dependent study[J],2020,531.
APA	Paul J.,&Ghosh A..(2020).Evolution of cratons through the ages: A time-dependent study.Earth and Planetary Science Letters,531.
MLA	Paul J.,et al."Evolution of cratons through the ages: A time-dependent study".Earth and Planetary Science Letters 531(2020).