Results 161 to 170 of about 270,968 (216)

Mantle Convection and Viscoelasticity

Annual Review of Fluid Mechanics, 1985
The ongoing revolution in the Earth sciences, which began more than twenty years ago, was originally based upon the increasingly widespread acceptance of the idea that continental masses have moved horizontally with respect to one another throughout geological time.
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Physics of Mantle Convection

2007
This chapter presents the fundamental physics necessary to understand the complex fluid dynamics of mantle convection. The first section derives the equations of conservation for mass, momentum, and energy and the boundary and interface conditions for the various physical quantities.
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Mantle convection for geologists

Choice Reviews Online, 2011
Mantle convection is the fundamental agent driving many of the geological features observed at the Earth's surface, including plate tectonics and plume volcanism. Yet many Earth scientists have an incomplete understanding of the process. This book describes the physics and fluid dynamics of mantle convection, explaining what it is, how it works, and ...
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Numerical Models of Mantle Convection

Annual Review of Fluid Mechanics, 1992
An overview of numerical methods describing the structure and dynamics of the mantle is presented with attention given to novel 3D modeling techniques. The paper reviews 3D spherical and Cartesian models for constant viscosity emphasizing the assumptions regarding style of convection, time dependence, and implications for the mantle.
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Convection in the earth's mantle

Tectonophysics, 1971
Abstract According to the hypothesis of global plate tectonics the surface motions of the earth are now known in considerable detail, but very little is known about the three-dimensional flow in the earth and about the forces which maintain the motions. The motions at depth are difficult to study because they produce few surface effects. For instance,
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Episodic mantle convection

Global Tectonics and Metallogeny, 1996
An infinite Prandtl number, anelastic axially symmetric mantle convection model which incorporates the effects of both the exothermic 410 km and endothermic 660 km phase transitions that exist in the mantle of the earth is employed to study the effects these phase transitions have on the mantle flow.
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The depth of mantle convection

Journal of Geophysical Research: Solid Earth, 1979
In this paper we elaborate on suggestions in the recent literature that the mantle convects uniformly through its entire depth. The main novel feature introduced here, which leads to a satisfactory account of earth temperatures, it the assumption of a thermal boundary layer at the mantle.
Walter M. Elsasser, Peter Olson, Bruce D. Marsh   +2 more
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On the scale of mantle convection

Tectonophysics, 1977
Abstract Observational evidence from glacial rebound and gravity anomalies shows that the mantle has a relatively uniform viscosity. Such a structure is consistent with the effects of temperature and pressure on microscopic mechanisms for plastic flow of solids. Thus the asthenosphere may extend to the base of the mantle.
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Convection in planetary mantles

Icarus, 1968
Abstract In the present paper we consider a self-gravitating sphere, of radius R and of uniform density, consisting of a core extending to a fraction η of the radius of the sphere and with a viscous mantle overlying the core. In the mantle departures from the state of equilibrium have given rise to internal motions, which are time-independent and ...
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Convection in the Earth’s Mantle

2009
Solid state convection is considered as the main heat transport mechanism in the earth’s mantle because of significant temperature difference between the base of lithosphere and core-mantle boundary and the large thickness of the mantle layer. Convective circulations in the mantle, induced by thermal heating are modeled by using fluid dynamical ...
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