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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Gurmeet Singh posted an Question
October 10, 2020 • 20:27 pm
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30 points
30 points
- IIT JAM
- Geology (GG)
Sir, please elaborate last line
As can be seen from figure above, subduction is at a shallower angle, because this hotter crust is more buoyant than the usual case. The reason that partial melting of subducted basalt is unusual is that this kind of subduction and magma generation is, geologically speaking, short-lived. Subduction will end when the overriding plate crashes into the mid-oceanic ridge. Most subduction zones are a long distance from the divergent boundaries of their plates, so steep subduction and magma production from the asthenosphere are the norm.
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Rahul kumar
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Low subduction angle results because hot plates are more buoyant. Plate boundaries are interrelated to each other; a plate which is subducting at one end in the convergent boundary is related to divergent boundary on the other end. Generally the the length of plate (distance between convergent zone and divergent zone of same plate) is very high so that the steep subduction (high subduction angle) and magma production from asthenosphere is expected in general case.
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Sajan sarthak![best-answer]()
Plate boundaries are interrelated to each other; a plate which is subducting(trench) at one end in the convergent boundary is related to divergent boundary(MoR) on the other end. Generally the the length of plate (distance between convergent zone and divergent zone of same plate) is very high so that the steep subduction (high subduction angle) and magma production from asthenosphere is expected in general case. so the island Arc and volcanic arc formation Low subduction angle results because hot plates are more buoyant.