Newly discovered exoplanet Diatonic12-B has just two plates, A and B as shown in
ID: 2305266 • Letter: N
Question
Newly discovered exoplanet Diatonic12-B has just two plates, A and B as shown in the figure. Plate B comprises the lower the hemisphere and plate A the upper. Points a, b, and c lie on the equator, and point d is diametrically opposite b (other side of planet). The zero meridian passes through point a. The pole of rotation of plate A relative to plate B is at 45 degrees N, 0 degrees E. The amplitude of the angular velocity vector is 10-10 radians per terrestrial (Earth) year. The radius of Diatonic12-B is 3400 km 3. a. What is the nature of the plate boundary between plates A and B? b. Calculate the relative velocity between plates A and B at locations a,b,c, and d. Plate A Plate BExplanation / Answer
Ans. a)
Transform boundaries. Transform boundaries (Conservative) occur where two lithospheric plates slide, or perhaps more accurately, grind past each other along transform faults, where plates are neither created nor destroyed. The relative motion of the two plates is either sinistral (left side toward the observer) or dextral (right side toward the observer). Transform faults occur across a spreading center.
b)
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.