What happens when 2 oceanic plates meet

List of tectonic plate interactions - Wikipedia

what happens when 2 oceanic plates meet

At some convergent boundaries, an oceanic plate collides with a continental plate. Oceanic crust This forms what is called a subduction zone. As the oceanic. Where oceanic crust meets continental crust. The denser oceanic plate is subducted, often forming a mountain range on the Both continental crusts are too light to subduct so a continent-continent collision occurs, creating especially large 2. Divergent boundaries – where two plates are moving apart. The space created. A COLLISION BOUNDARY OCCURS WHERE 2 CONTINENTAL PLATES are BOUNDARY FORMS WHERE 1 CONTINENTAL AND 1 OCEANIC PLATE are.

To watch a simulated fly-by along New Zealand's plate boundary check out this video.

What Happens Where Tectonic Plates Meet?

There are three main types of plate boundaries: Subduction zones occur when one or both of the tectonic plates are composed of oceanic crust.

The denser plate is subducted underneath the less dense plate.

what happens when 2 oceanic plates meet

The plate being forced under is eventually melted and destroyed. Where oceanic crust meets ocean crust Island arcs and oceanic trenches occur when both of the plates are made of oceanic crust.

What Happens Where Tectonic Plates Meet? — Mr. Mulroy's Earth Science

Zones of active seafloor spreading can also occur behind the island arc, known as back-arc basins. These are often associated with submarine volcanoes. Where oceanic crust meets continental crust The denser oceanic plate is subducted, often forming a mountain range on the continent. The Andes is an example of this type of collision.

Where continental crust meets continental crust Both continental crusts are too light to subduct so a continent-continent collision occurs, creating especially large mountain ranges.

what happens when 2 oceanic plates meet

The most spectacular example of this is the Himalayas. As the oceanic plate is subducted sediment is scraped off to form an acretionary wedge at the point of collision between the two plates. When the oceanic plate is subducted due to partial melting of the asthenosphere magma with an andesitic composition is formed. The magma formed is less dense than the surrounding material so it rises to the surface to form a magmatic arc on the edge of the continent which the oceanic plate is subducted under.

Over time the continental margin, due to compression forms into a folded mountain belt. As time goes on the hot magma rising upward from the subduction zone causes further compression of the mountain belt.

  • List of tectonic plate interactions
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Deep mountain roots form and are gradually metamorphosed and intruded with granitic plutons. Explosive volcanic activity is commonly associated with this type of collision boundary. This is shown in the diagram below. The major componants of an oceanic - continental collision zone and a accretionary wedge are also shown in the diagrams below. Deformation at an ocean-continent collision zone Continent-Continent Collision When two continental plates collide neither plate can be subducted due to their high bouyancy.

With this type of collision there are no features such as a subduction zone, trench or acretionary wedge. The collision of two continental plates occurs when a sea becomes narrower until both plates collide. After collision the oceanic lithosphere breaks off and sinks into the mantle. The crust is thickened by the underthrusting of one continent under the other. These regions have both shallow focus earthquakes and deep focus earthquakes as the oceanic lithosphere is subducted under the mounatin range.

Thrust faults and highly metamorphised granites are common charcteristics of these collision zones. The most well known example of this collision zone is the Himalayas where India has collided with Asia.