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Is the following sentence true or false when solid mantle rock rises during seafloor spreading magma is produced as a result of decompression melting?
True. When solid mantle rock rises during seafloor spreading, the decrease in pressure causes decompression melting, resulting in the production of magma. This magma can then rise to the surface and form new oceanic crust.
What causes melting of material under divergent plate boundaries Is it melting of rock recompression of rock freezing of rock or decompression of rock?
Melting of material under divergent plate boundaries is primarily caused by decompression of rock as tectonic plates move apart, reducing pressure on the underlying mantle and allowing rock to melt. This process creates magma that rises to the surface, forming new crust along the mid-ocean ridges.
What observation has been made about the age of the basalt that forms a mid ocean ridge?
New magma of basalt composition emerges at and near the axis because of decompression melting in the underlying Earth's mantle.
What is decompression melting?
A decrease in pressure, just as a rise in temperature, can melt materials, specifically rocks in this case. Therefore, decompression melting takes place as a result of less pressure being exerted on rocks. This occurrance is common at mid-ocean ridges where rocks are uplifted and consequently have less overburden.
How is decompression melting triggered?
Decompression melting occurs when the pressure on hot rock is reduced, causing it to melt due to the decrease in pressure. This can happen as tectonic plates move apart, creating a reduction in pressure on the underlying mantle rocks, leading to partial melting and the formation of magma.
Is the following sentence true or false when solid mantle rock rises during seafloor spreading magma is produced as a result of decompression melting?
True. When solid mantle rock rises during seafloor spreading, the decrease in pressure causes decompression melting, resulting in the production of magma. This magma can then rise to the surface and form new oceanic crust.
Why does the mantle melt at divergent margins?
The mantle melts at divergent margins due to decompression melting. As tectonic plates move apart, the pressure on the mantle decreases, causing it to melt and rise to the surface, leading to the formation of new oceanic crust. This process is known as seafloor spreading.
Is melting of the mantle achieved by decreasing pressure at divergent plate boundaries?
Melting of the mantle at divergent plate boundaries is primarily caused by the decrease in pressure as the tectonic plates move apart. This reduction in pressure lowers the melting point of the mantle rock, allowing it to melt and form magma that can rise to the surface and create new crust. Magmatic activity at divergent boundaries is a key driver of seafloor spreading and plate tectonics.
Which two processes commonly generate magma?
decompression melting and wet melting (the addition of volatiles) :)
What is the definitions of seafloor spreading?
Seafloor spreading is the extension of oceanic lithosphere that occurs where two oceanic plates are moving apart. While the explanation for its causes remain somewhat of a mystery, it goes something like this: oceanic plates at the mid-ocean ridges are either being pushed or pulled apart, probably a combination of both. Rock from the mantle rises and undergoes decompression melting, filling the void left by the separating plates. The lava then turns into the rock basalt and becomes an addition to the ocean floor. The ocean floor grows roughly equally on either side of the ridge. (if you're doing a project on seafloor spreading, i suggest you to put this in your own words. therefor, your teacher always check the internet to see if you're copying. I once got in trouble for that) ;)
What is decompression melting how it relates to Earths internal convection?
Decompression melting occurs when a decrease in pressure on a mantle rock causes it to melt without an increase in temperature. This process is related to Earth's internal convection because rising mantle material undergoes decompression as it moves towards the surface, leading to melting and the formation of magma chambers.
What is happening geologically at areas of seafloor spreading?
Seafloor spreading is the extension of oceanic lithosphere that occurs where two oceanic plates are moving apart. While the explanation for its causes remain somewhat of a mystery, it goes something like this: oceanic plates at the mid-ocean ridges are either being pushed or pulled apart, probably a combination of both. Rock from the mantle rises toward the thinned crust and undergoes decompression melting, filling the void left by the separating plates. The lava then turns into the rock basalt and becomes an addition to the ocean floor. The ocean floor grows roughly equally on either side of the ridge.
What causes melting of material under divergent plate boundaries Is it melting of rock recompression of rock freezing of rock or decompression of rock?
Melting of material under divergent plate boundaries is primarily caused by decompression of rock as tectonic plates move apart, reducing pressure on the underlying mantle and allowing rock to melt. This process creates magma that rises to the surface, forming new crust along the mid-ocean ridges.
What observation has been made about the age of the basalt that forms a mid ocean ridge?
New magma of basalt composition emerges at and near the axis because of decompression melting in the underlying Earth's mantle.
How is crust created at the oceanic ridge?
Mid-ocean ridges are a line of volcanic mountains under the oceans between the continents. As the oceanic plates are being pulled apart by the processes of plate tectonics, magma is formed from decompression melting in the mantle, and rises upward to fill in the gap that is created. Because this material solidifies and is still hot, it is buoyant and rises higher than the surrounding seafloor, creating the ridges. As it is pulled away from the spreading point by plate tectonics, it gradually cools, making it less buoyant; it gradually drops in elevation.
What is the primary process involved in the formation of magma at a rift?
Decompression melting of extremely hot mantle rock as it rises toward the surface.
How does magma form?
Magma can be formed from the subduction and melting of cold, dense, wet oceanic crust at some convergent plate margins. The moisture in the rock assists in the melting of the crust and the rock surrounding it. Magma is also formed at hot spots in the mantle where hot material undergoes decompression melting as it rises. Decompression melting also occurs at the mid-ocean ridges where new oceanic crust is formed from rising mantle rock.
