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This is a complex question and is a subject of continuing ongoing scientific research. A summary of some of the hypothesised causal mechanisms of plate movement (based on scientists current understanding of the process) is given below:
The primary source of energy for the motion of the lithospheric plates is dissipation of energy from the earth in the form of heat transfer. This heat transfer causes convection within the mantle and this convecting mantle material is hypothesised to exert a drag force on the base of the lithosphere. This is known as Basal Drag and was thought to be an important driver of tectonic plate motion until recently when advances in geophysical imaging techniques (specifically 3D seismic tomography) allowed geophysicists to form a more detailed model of the structure of the mantle but were unable to locate the necessary large scale convections structures. Further to this, geophysicists no longer believe that the asthenosphere has the necessary stiffness or rigidity to cause sufficient friction on the base of the lithosphere to be a significant driver of plate motion.
Gravity is also believed to play a role in the driving of plate motions, both at mid-ocean-ridges (MOR) and at subduction zones. Both these mechanisms are also linked to the dissipation of heat and convection in that they are reliant on variations in the buoyancy of the lithosphere as temperature changes occur as described below:
When hot (and so low density, buoyant) mantle material rises at an MOR, it is intruded into the pre-existing oceanic lithosphere as well as extruded at the upper surface. This newly intruded material is at a high temperature and cools relatively slowly. As such the newly formed oceanic lithosphere is buoyant and rises relative to the older cooler oceanic lithosphere further from the MOR. Even though this younger lithospheric crust is buoyant it is still significantly denser than the underlying upwelling hot mantle material and so "slides" down away from the crest in a process known as gravitational sliding. This is considered a secondary driving force as it only acts in close proximity to the ridge and does not transmit load into the surrounding lithosphere (it does not "push" the lithosphere away from the ridge, it is instead dragged - the tectonic regime is tensile, not compressive).
Another more significant gravitational driving force of plate motion is that caused by the old, cool and so low buoyancy oceanic crust that sinks back into the mantle at subduction zones and acts to drag the attached oceanic lithosphere towards the plate boundary. This is known as slab pull and is thought to be a significant driver of plate motions as it has been observed that tectonic plates with subduction boundaries tend to move with a higher velocity than those without. Subducting oceanic slabs also promote another driving force of plate motion known as trench or slab suction. This is a process where the movement of the downgoing slab promotes flow in the nearby mantle. This flowing mantle material is thought to exert a traction both on the downgoing slab and the overlying non subducting slab, pulling them both towards the subduction zone.
It should be noted that not all plates have significant subduction boundaries and yet still undergo plate movements so it is possible that a combination of all these mechanisms influences plate movement (as well as the possibility that there is some as yet undiscovered driving force that has a significant role).
The above is a simple summary of a complex topic and as has been stated the causal mechanisms that drive the motions of tectonic plates are not fully understood and as such the reader should remember that this is a current and active area of research in geophysics and so the hypotheses summarised above may be accepted, rejected or modified over time!
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What else can I help you with?
What is the surface on which the lithospheric plates move around earths surface?
Lower mantle is the surface on which the lithospheric plates move around earths surface.
How do earthquakes build up?
The shifting of the Earths Techtonic Plates is what causes earthquakes. The earths crust is floating on top of a layer of magma. When two of earths techtonic plates shift and rub up against eachother, they get caught, because they are rigid, not smooth. When they finally get uncaught, they move very fast and that is what causes the shaking, as does the rubbing up against eachother.
Ost geologists thinks that the movement of earths plates is caused by?
Most geologists believe that the movement of the Earth's plates is caused by the process of convection currents in the mantle. These currents are driven by the heat generated from the core of the Earth, which causes the molten rock in the mantle to move in circular patterns, leading to the movement of the tectonic plates.
What causes continental plates to move?
Continental plates move due to the process of plate tectonics, where the plates float on the semi-fluid asthenosphere layer beneath them. This movement is driven by convection currents in the mantle, caused by heat from the Earth's core. When these currents push or pull on the plates, they cause them to move, leading to phenomena like earthquakes, volcanic activity, and the formation of mountains.
What process causes earths plates to move?
The process of 'earth plates moving' is Alfred Wageners theory of continental drift. This theory proposes that convenction currents in the earths mantle provides a 'cushion' on which the plates can move.
What causes earths plates to move continuously?
Convection in the earth's mantle.
What causes earths changes to earths landforms?
the tectonic platesthe tectonic plates can be move to be far and near to each other
The lithosphere is broken into pieces called what?
what causes the earths tectonic plates to move
How does the movement of earths plates cause earthquakes?
The plates rub together causing the rocks to move and it causes the ground to shake forming an earthquake. The more the plates move, the bigger the earthquake number.
Why do earthquakes and volcanoes occur?
because of the plates in earth shift fast and the force causes the earth to shake.
What do geologists think causes earths plates to move?
The movement of the Earth's plates is known as plate tectonics. Geologists think the plates move due to a build up of extreme heat in the Earth's crust.
Do volcanoes erupt when earths plates move?
Well, when earths plates move away from each other that's when it happens but move well then NO!
Why is the earths crust always moving?
Simple- Convection in the mantle causes mantle to slowly move, and it pushes against the crust. As it does this, the tectonic plates move.
Do the earths plates move slow?
yes
Do Earths Tetonic plates move apart?
Yes they do.
What state move mean describes earths plates?
In human history no state has had to move because of the Earth's plates.
How does earthquake causes tsunami?
because it shifs the earths plates
