on what type of plate boundary would you find a mafic igneous rock?
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Felsic and intermediate magmas and rocks tend to form at ocean--continent or ocean--ocean convergent boundaries, or where hot spots are found on land, and mafic magmas form in divergent plate boundaries and hot spots in the ocean.
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Divergent boundary A divergent, or constructive, plate boundary, where new material is produced at the surface. The Mid-Atlantic Ridge is a good example of a constructive plate boundary. You can see normal faulting at the surface where the Mid-Atlantic Ridge crosses Iceland. Plates can move apart at a boundary.
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Convergent Plate Boundaries—Collisional Mountain Ranges.
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Chemically, mafic rocks are enriched in iron, magnesium and calcium and typically dark in color. In contrast the felsic rocks are typically light in color and enriched in aluminium and silicon along with potassium and sodium. The mafic rocks also typically have a higher density than felsic rocks.
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The deep trenches, volcanic activity, and mountain ranges are formed along convergent plate boundaries and depend on the type of crustal plate involved in the collision. The collision between oceanic crust and continental crust result in the subduction of dense oceanic crust under the less dense continental crust...
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Hot spots are places within the mantle where rocks melt to generate magma. The presence of a hot spot is inferred by anomalous volcanism (i.e. not at a plate boundary), such as the Hawaiian volcanoes within the Pacific Plate.
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In subduction zones we see convergent plate boundaries where two plates are colliding with each other and one of the plates is subducting back into the Earth. This type of plate boundary is particularly effective for causing tsunamis.
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The image shows the Convergent plate boundary. Explanation: Convergent boundaries occur wherever the Earth's tectonic plates move or collide toward each other.
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The location where two plates meet is called a plate boundary. Plate boundaries are commonly associated with geological events such as earthquakes and the creation of topographic features such as mountains, volcanoes, mid-ocean ridges, and oceanic trenches.
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Subduction zones exist at convergent plate boundaries where one plate of oceanic lithosphere converges with another plate. The descending slab, the subducting plate, is over-ridden by the leading edge of the other plate.
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At X, the mid-ocean ridge occurs along a boundary between two oceanic plates. The plates are moving apart, causing molten material to repeatedly rise from the mantle, erupt, and harden as solid rock along the center of the ridge.
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['There are three main types of plate boundaries:', 'Convergent boundaries: where two plates are colliding.', 'Divergent boundaries – where two plates are moving apart.', 'Transform boundaries – where plates slide passed each other.']
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Shield volcanoes are found on divergent plate boundaries , where two plates move away from one another. Shield volcanoes have the following characteristics: Basaltic magma, which is high in temperature, very low on silica and with low gas content.
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Natural phenomena such as earthquakes, mountain formation, and volcanoes occur at plate boundaries. Mountains are usually formed at what are called convergent plate boundaries, meaning a boundary at which two plates are moving towards one another. This type of boundary eventually results in a collision.
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If the pressure and temperature are too high, metamorphic rock will melt and become magma. Metamorphic rocks are most abundant at convergent plate boundaries, but can occur in other areas where there are increased pressures and/or temperatures. Sedimentary rocks form only on the surface of the Earth.
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As the sinking plate moves deeper into the mantle, fluids are released from the rock causing the overlying mantle to partially melt. The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary.
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Contact metamorphism is common at both convergent and divergent plate boundaries, in areas where molten rock is produced. Regional metamorphism largely occurs at convergent plate boundaries.