globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2019.115962
论文题名:
Evolution of cratons through the ages: A time-dependent study
作者: Paul J.; Ghosh A.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 531
语种: 英语
中文关键词: 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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165203
Appears in Collections:气候变化与战略

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作者单位: Centre for Earth Sciences, Indian Institute of Science, Bangalore, 560012, India

Recommended Citation:
Paul J.,Ghosh A.. Evolution of cratons through the ages: A time-dependent study[J]. Earth and Planetary Science Letters,2020-01-01,531
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