What generally happens when subduction derived magma encounters thick continental crust?

Magma generates above the subducting slab mafic composition forms by partial melting or ultramafic mantle.some magma may never reach the surface, erupts, forming clusters or belts of volcanoes.Heat surrounds the rocks causing localized partial melting felsic or intermediate magma

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;