How Mantle Slabs Drive Plate Tectonics
@article{Conrad2002HowMS, title={How Mantle Slabs Drive Plate Tectonics}, author={Clinton P. Conrad and Carolina R. Lithgow‐Bertelloni}, journal={Science}, year={2002}, volume={298}, pages={207 - 209} }
The gravitational pull of subducted slabs is thought to drive the motions of Earth's tectonic plates, but the coupling between slabs and plates is not well established. If a slab is mechanically attached to a subducting plate, it can exert a direct pull on the plate. Alternatively, a detached slab may drive a plate by exciting flow in the mantle that exerts a shear traction on the base of the plate. From the geologic history of subduction, we estimated the relative importance of “pull” versus…
382 Citations
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- 2013
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23 References
Mantle dynamics with induced plate tectonics
- Geology
- 1989
Mantle circulation and plate tectonics can be described by means of two scalar fields. The poloidal field is related to horizontal divergence, i.e., to the vertical mass flux. The toroidal field…
On the Relative Importance of the Driving Forces of Plate Motion
- Geology
- 1975
Summary A number of possible mechanisms have recently been proposed for driving the motions of the lithospheric plates, such as pushing from mid-ocean ridges, pulling by downgoing slabs, suction…
Effects of plate bending and fault strength at subduction zones on plate dynamics
- Geology
- 1999
For subduction to occur, plates must bend and slide past overriding plates along fault zones. Because the lithosphere is strong, significant energy is required for this deformation to occur, energy…
A simple global model of plate dynamics and mantle convection
- Geology
- 1981
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Speculations on the Consequences and Causes of Plate Motions
- Geology
- 1969
Summary Plate theory has successfully related sea floor spreading to the focal mechanisms of earthquakes and the deep structure of island arcs. It is used here to calculate the temperature…
Predicting plate velocities with mantle circulation models
- Geology
- 2001
We predict plate motions from a comprehensive inversion of theoretical estimates of tectonic forces in order to evaluate the relative importance of these and the uncertainties of such models.…
Some simple physical models for absolute plate motions
- Geology
- 1974
Although the relative angular velocities of the earth's plates are well known, the velocities relative to the underlying mantle and the nature of the driving forces are not. We calculate several…
Earthquake stress drops, ambient tectonic stresses and stresses that drive plate motions
- Geology
- 1977
A variety of geophysical observations suggests that the upper portion of the lithosphere, herein referred to as the elastic plate, has long-term material properties and frictional strength…
Subducted slabs and the geoid: Constraints on mantle rheology and flow
- Geology
- 1983
Geoid anomalies are primarily the result of the density contrasts driving mantle convection and plate motion. The total geoid anomaly resulting from a given density contrast in a convecting earth is…