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Intermediate magma is formed through a combination of processes, primarily the partial melting of the Earth's crust and the mixing of different magma types. This type of magma typically has a composition between that of basaltic and granitic magmas, often resulting from the melting of sedimentary rocks or the contamination of basaltic magma with crustal materials. Additionally, subduction zone dynamics can contribute to the generation of intermediate magma, where water from subducting plates lowers the melting temperature of the surrounding mantle materials.
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Do intermediate contains the least amount of silica?
No, intermediate magma typically contains a moderate amount of silica compared to other magma types. Basaltic magma has the lowest silica content, while rhyolitic magma has the highest silica content.
What are different processes that could lead to a mafic magma evolving into an intermediate magma?
Mafic magma can evolve into intermediate magma through several processes, including fractional crystallization, where early-formed minerals (rich in magnesium and iron) crystallize and remove these components from the liquid, increasing the silica content. Another process is magma mixing, where mafic magma interacts with more silicic (felsic) magmas, resulting in a hybrid composition. Additionally, assimilation of surrounding rocks can introduce more silica and modify the magma's composition, contributing to the evolution towards intermediate magma.
Is andiestic magma high in silica?
Yes, andesitic magma is intermediate in silica content, typically ranging between 57-63% silica. This silica content contributes to its intermediate viscosity and eruptive behavior, which often results in explosive eruptions.
What happen when felsic magma mix with basic magma?
When felsic magma mixes with basic magma, it can lead to the formation of intermediate magma. This mixture can have a different composition in terms of silica and mineral content compared to the original magmas. The interaction can also trigger new chemical reactions, potentially changing the physical properties and eruption behavior of the magma.
Which is not a compositional classification of a magma?
Chemical classification is not a compositional classification of magma. Compositional classifications include mafic, intermediate, and felsic based on the silica content of the magma.
What are the 3 types of magma?
basaltic magma ,Andesitic magma and Rhyolitic magma
Do intermediate contains the least amount of silica?
No, intermediate magma typically contains a moderate amount of silica compared to other magma types. Basaltic magma has the lowest silica content, while rhyolitic magma has the highest silica content.
The types of magma?
Felsic, intermediate, mafic and ultra mafic are the four broad types of magma.
What are some different types of magma?
Mafic intermediate and Felsic
What are different processes that could lead to a mafic magma evolving into an intermediate magma?
Mafic magma can evolve into intermediate magma through several processes, including fractional crystallization, where early-formed minerals (rich in magnesium and iron) crystallize and remove these components from the liquid, increasing the silica content. Another process is magma mixing, where mafic magma interacts with more silicic (felsic) magmas, resulting in a hybrid composition. Additionally, assimilation of surrounding rocks can introduce more silica and modify the magma's composition, contributing to the evolution towards intermediate magma.
What creates the crust?
cooled magma
Is andiestic magma high in silica?
Yes, andesitic magma is intermediate in silica content, typically ranging between 57-63% silica. This silica content contributes to its intermediate viscosity and eruptive behavior, which often results in explosive eruptions.
What happen when felsic magma mix with basic magma?
When felsic magma mixes with basic magma, it can lead to the formation of intermediate magma. This mixture can have a different composition in terms of silica and mineral content compared to the original magmas. The interaction can also trigger new chemical reactions, potentially changing the physical properties and eruption behavior of the magma.
What are the magma types in order of decreasing viscosity?
Most viscous Felsic magma i.e. rhyolite Intermediate magma i.e. andersite Mafic magma i.e. Basalt Ultramafic magma i.e. Komatiite Least viscous
Which is not a compositional classification of a magma?
Chemical classification is not a compositional classification of magma. Compositional classifications include mafic, intermediate, and felsic based on the silica content of the magma.
Does Andesitic magma have both an intermediate gas content and explosiveness?
Andesitic magma typically has an intermediate gas content, resulting in eruptions that can be explosive, but not as violently explosive as magmas with higher gas contents like rhyolitic magma. The explosiveness of Andesitic magma eruptions can be influenced by factors such as the speed of gas release and the presence of water or other volatiles.
Why does intermediate magma erupt in continental arcs?
Intermediate magma erupts in continental arcs primarily due to the subduction of an oceanic plate beneath a continental plate. This process generates heat and pressure, causing the melting of the mantle and the overlying crust, leading to the formation of intermediate magmas, which are typically andesitic in composition. The presence of water and other volatiles, released from the subducting plate, lowers the melting point of the surrounding rocks, facilitating the generation of this magma type. As the intermediate magma rises through the crust, it can lead to explosive volcanic eruptions characteristic of continental arcs.
