Would Granite From At Plate Collision Zone

Continental collision is a phenomenon of the plate tectonics of earth that occurs at convergent boundaries.

Would granite from at plate collision zone.

Harris et al 1986 this collisional tectonic setting is distinct from the preceding one of oceanic plate subduction and commonly involves. Oceanic crust tends to subduct under continental crust owing to its relative density. Subduction of oceanic lithosphere has invariably led to closure of ocean basins collisions between island arcs and continental blocks and the formation of granite magmatism along the resulting sutures pitcher 1983. The granites and granite gneisses from a tectono metamorphic complex exposed along the shyok valley in the karakoram region india forms the southern margin of asian plate in the india asia collision zone.

In this section we compare the main features of granitic magmatism in both major granite forming systems on earth. Magmatic arcs and post collision zones. Pearce et al 1984. Juvenile granite in the sanandaj sirjan zone nw iran.

Well really the mechanism that creates granitic magma is subduction of oceanic plates which occurs at convergent boundaries. The two mica granite contains xenocrystic material from both the lma and the indian continental crust and indicates s type granite magmatism related to india eurasia continental collision at 35. Plate tectonics bushveld complex himalayan leucogranite hercynian granites oslo rift kohistan batholith oceanic accretion subduction continental collision continental extension oxford scholarship online requires a subscription or purchase to access the full text of books within the service. Late jurassic early cretaceous arc continent collision.

Continental collision is a variation on the fundamental process of subduction whereby the subduction zone is destroyed mountains produced and two continents sutured together. Collision zones at collision zones fold mountains will be formed. These rocks have been subjected to mineralogical geochemical and u pb zircon geochronological investigations to constrain the petrogenetic and geodynamic evolution of the karakoram terrane. This largely basaltic oceanic crust contain a relatively high percentage of water and once the plate subducts into the mantle the water is driven off lowering the melting.

In simple terms the opposition between arc and post collisional zones also overlaps with the age old debate on the origin of granitic rocks by i partial melting of older crust or ii.