![]() ![]() Seismic tomography reveals pieces of lithosphere that have broken off during convergence. It is likely that the plate may break along the boundary of continental and oceanic crust. a) Subduction of ocean crust (OC) beneath continental crust (CC) b) Subduction of ocean crust (OC) beneath ocean crust (OC) c) Continental Collisions: continental crust (CC) colliding with continental crust (CC). In some instances, initial convergence with another plate will destroy oceanic lithosphere, leading to convergence of two continental plates. Three types of Convergent Plate Boundaries: OC/CC, OC/OC, & CC/CC Three types of convergent plate boundaries are recognized. Some lithospheric plates consist of both continental and oceanic lithosphere. Both dehydration and partial melting occurs along the 1,000 ☌ (1,830 ☏) isotherm, generally at depths of 65 to 130 km (40 to 81 mi). When an oceanic plate collides with a continental plate the crust forming the oceanic plate gets bent and pulled under. This releases water into the hotter asthenosphere, which leads to partial melting of asthenosphere and volcanism. When two plates converge, what happens depends on the types of lithosphere that meet. Which plate undergoes subduction at oceanic - continental convergent plate boundaries Why answer choices. As the relatively cool subducting slab sinks deeper into the mantle, it is heated, causing hydrous minerals to break down. Seven classes of plate boundaries: OTF - Ocean Transform Fault OCB - Ocean Convergent Boundary OSR - Ocean Spreading Ridge CCB - Continental Convergent. The force of gravity helps drive the subducting slab into the mantle. Subduction begins when this dense crust converges with less dense crust. As this new crust is pushed away from the spreading center by the formation of newer crust, it cools, thins, and becomes denser. ![]() These convection cells bring hot mantle material to the surface along spreading centers creating new crust. Convergent boundaries, where two plates are moving toward each other, are of three types, depending on the type of crust present on either side of the boundary oceanic or continental. Convection cells are the result of heat generated by the radioactive decay of elements in the mantle escaping to the surface and the return of cool materials from the surface to the mantle. Plate tectonics is driven by convection cells in the mantle. Plate collision can produce earthquake, volcanoes, mountains formation, and other geological event. In only a few places in the world, where the subduction process has been interrupted by some other tectonic process, has partially subducted blueschist rock returned to the surface.Region of active deformation between colliding tectonic plates Simplified diagram of a convergent boundary A convergent plate boundary is the boundary that occur when two plates collide each other either a continental plate with continental plate or oceanic plate. Everest and K2 The India plate is still moving Northward which is pushing the Himalayas 1 inch higher each year. What is a little surprising is that anyone has seen it! Most blueschist forms in subduction zones, continues to be subducted, turns into eclogite at about 35 kilometers depth, and then eventually sinks deep into the mantle-never to be seen again because that rock will eventually melt. A convergent plate boundary also known as a destructive plate boundary, usually involves an oceanic plate and a continental plate. Continental Continental Convergent Boundaries Example: India Plate converging with Eurasia Plate to create the Himalayas which include the tallest mountains, Mt. You’ve probably never seen or even heard of blueschist that’s not surprising. When two plates collide at a convergent plate boundary, the denser plate. ![]() A special type of metamorphism takes place under these very high-pressure but relatively low-temperature conditions, producing an amphibole mineral known as glaucophane (Na 2(Mg 3Al 2)Si 8O 22(OH) 2), which is blue in color, and is an important component of a rock known as blueschist. a continental-continental convergent boundary a collisional boundary. ![]()
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