Where can you locate sedimentary metamorphic and igneous rocks in a plate boundary?

At a convergent plate boundary, where you get partial melting of the subducting slab. This partial melt rises and pools, forming a magma chamber. When a magma chamber crystallises, the interior will be igneous (probably felsic/ acidic in composition), around the igneous intrusion you will get contact metamorphosed sediments creating a metamorphic aureole, and at the accretion zone you get the accretionary wedge, which is basically sediment which has been scraped off the subduction oceanic slab.