Ares is a planet with just 2 plates, A and B (Figure 4). Plate B comprises the l

Question

Ares is a planet with just 2 plates, A and B (Figure 4). Plate B comprises the lower hemisphere and plate A the upper, as shown. Points a, b, and c lie on the equator and point d is diametrically opposite b. The zero meridian passes through point a. The pole of rotation of plate A relative to plate B is at 45 degree N, 0 degree E. The amplitude of the angular velocity vector is 10^-10 radians per terrestrial year. The radius of Ares is 3400 km. Calculate relative velocity between plates A and B at locations a, b, c and d. what types of plate boundaries between A and B at these locations a, b, c, and d?

Explanation / Answer

Ares occurs where two lithospheric plates slide more accurately each other along transform faults, where plates are created or destroyed.

The direction of relative velocity at any point x on the equator is the direction vector is the rotation vector and r is the vector pointing from the center of the planet to x.

using right hand rule, we can qualitatively find the direction of u, which is always perpendicular to the great circle plane defined by w and r.

At a point u points outward from the paper. at point b u is the sum of one vector pointing to the right and another pointing up.

there are strike slip and divergent/convergent motions on the plate boundary.

The plate boundary motion is pure strike slip at points a and c.

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