ES + 3. Mechanism of Plate movement

Question 1

What are driving forces

Answer 1

• Mantle Convection
• Slab Suction
• Slab pull
• Ridge Push

Question 2

What are resisting forces?

Answer 2

• Transform Fault Resistance
• Basal drag/Drag force
• Slab Resistance
• Collisional Resistance

Question 3

Mantle Convection

Answer 3

Precursor of all forces acting on the tectonic plate. Direction of the current causes causes the plates above to move in the direction of the current

Question 4

Slab Pull

Answer 4

sinking slab is being pulled downward.

Where the subducting slide sinks

Question 5

Slab Suction

Answer 5

happens in the subduction zone where the convection currents in the mantle suck the plate down.

Pulls the plate downward, subducting slide and the converging slide

Question 6

Ridge Push

Answer 6

lithosphere is pushed up by the asthenosphere (mantle convection) gravity pulls the plate down > new crust formed

Question 7

Slab Resistance

Answer 7

force that resists all forces associated to plate movement, upper part of the mantle

Question 8

Collisional Resistance

Answer 8

opposes slab pull, resists subduction because of friction. Resistance at the lower part of the subduction zone

Question 9

Transform Fault Resistance

Answer 9

Friction in transform plate boundaries

Question 10

Drag force/Basal Drag

Answer 10

crust and lithosphere produces friction, resisting dragging movement cause by slab pull