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28 sie 2017 · The main purpose of this study is twofold: (1) to develop detailed models of lithospheric strength of oceanic plates and ridge-push force, and (2) to determine the rheological and tectonic conditions for ridge-push force transmission in the interior of oceanic plates.
Ridge push (also known as gravitational slides or sliding plate force) is a proposed driving force for plate motion in plate tectonics that occurs at mid-ocean ridges as the result of the rigid lithosphere sliding down the hot, raised asthenosphere below mid-ocean ridges.
29 gru 2014 · The main driving forces are slab pull (F SP) and ridge push (F RP), and forces like mantle drag (F DF and F CD) can both oppose and drive plate motions. Suction ( F SU ), first identified by Elsasser ( 1971 ), pulls the overriding plate toward the trench.
24 kwi 2024 · Ridge-push forces cause two plates to pull apart on the surface. Slab-pull forces pull the plates down. This movement of out and down is also encouraged by convection traction, or clockwise and counterclockwise currents that are present beneath the plates.
ridge push: the force due to the buoyancy of the hot mantle rising to the surface beneath the ridge. viscous drag: the force opposing motion of the plate and slab past the viscous mantle underneath or on the side. This force balance is given by: Fridge − push + Fslab − pull − Fviscous − drag = 0.
Ridge push force and slab pull are two key forces that drive tectonic plate movements. Ridge push occurs at mid-ocean ridges, where newly formed, elevated oceanic crust slides down due to gravity, while slab pull takes place at subduction zones where denser oceanic plates sink into the mantle.
Although ridge-push/slab-pull is the favored mechanism for plate motion, it’s important not to underestimate the role of mantle convection. Without convection, there would be no ridges to push from because upward convection brings hot buoyant rock to surface.
