What Is Granitic Magma Like

Eruptions of granitic magma can produce rhyolite pumice obsidian or tuff.

What is granitic magma like.

Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture. When magmas are judged by mineral composition like this they are technically referred to as felsic which is granitic and mafic which is basaltic. Granitic magma has high levels of potassium and sodium while basaltic magma has very low levels of these minerals. A basaltic pond of magma becomes trapped below continental crust and partially melts this silica rich crust into a granitic magma.

Partial melting of intermediate rocks can generate felsic granitic magmas. Explosive eruptions produce tuff or pumice. Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. A crater is a bowl like depression at the top of the volcano.

First i would like to clarify the position of one who is said to hold divergent views. Granite definition a coarse grained igneous rock composed chiefly of orthoclase and albite feldspars and of quartz usually with lesser amounts of one or more other minerals as mica hornblende or augite. Effusive eruptions produce rhyolite or obsidian if the lava cools rapidly. These rocks have similar compositions but different cooling conditions.

Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. Other articles where granitic magma is discussed. Granitic or rhyolitic magmas and andesitic magmas are generated at convergent plate boundaries where the oceanic lithosphere the outer layer of earth composed of the crust and upper mantle is subducted so that its edge is positioned below the edge of the continental plate or. Strictly speaking granite is an.

These different rock types can all be found in the products of a single eruption. The supposed divergence here is my acceptance on one hand of the evidence for the existence of s and i type granites and the implications for the nature of their protoliths and on the other hand my doubt in the applicability of the restite unmixing model for chemical variation in granitic magmas. Figure 2 formation of granitic magma granitic magmas are generated by the partial melting of continental crust. The parental granitic magma underwent the mixing of mantle derived mafic magma and crustal felsic magma coupled with fractional crystallization during magma ascent before emplacement.