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Igneous rocks containing mostly plagioclase feldspar and a significant percentage of dark silicate minerals are typically classified as basaltic rocks. These rocks have a composition that is intermediate between mafic and felsic rocks, with a silica content of around 50-60%. Basaltic rocks often form from the solidification of magma with a basaltic composition.

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What igneous rock contains mostly plagioclase feldspar and about 30 percent dark silicates?

A Diorite.


What mineral group is orthoclase feldspar in?

silicates


What kind of rock containing aluminum silicates and other minerals?

The type of rock that contains aluminum silicates and other minerals is called "feldspathic rock," which includes granite and syenite. These rocks are primarily composed of feldspar and quartz, along with other minerals like mica and amphibole. Aluminum silicates, such as kaolinite and muscovite, are also common in these types of rocks, contributing to their overall mineral composition.


What is the mineral composition of syenite?

Syenite is primarily composed of alkali feldspar minerals such as orthoclase and plagioclase feldspar, along with small amounts of other minerals such as quartz, hornblende, and mica. It lacks significant amounts of calcium-rich plagioclase feldspar, which distinguishes it from granite.


To which mineral group does orthoclase feldspar belong?

Orothoclase Feldspar belong to the silicates group.


What is a kind of rock containing aluminum's silicates and other minerals?

feldspar


Fieldspar amd mica are examples of mineral?

Both feldspar and mica are silicates.


When a sandstone contains appreciable quantities of feldspar the rock is called arkose?

Yes, arkose is a type of sandstone that contains a significant amount of feldspar. This feldspar content distinguishes arkose from typical sandstones, giving it a unique composition and appearance. Arkose is often formed from the breakdown and weathering of granitic rocks, which are rich in feldspar.


What minerals does the rock granite always contain?

Granite always contains the minerals quartz, feldspar (potassium feldspar or plagioclase feldspar), and mica (biotite or muscovite). These minerals give granite its characteristic appearance and properties.


What type of rock contains aluminum silicates and other minerals?

The real question is what type of rock doesn't contain aluminum sillicates and other mineralsBut if you really want the answer I suppose I will tell you. It's feldspar. Happy?


is gneiss a silicate rock?

Yes, gneiss is a type of metamorphic rock that typically contains silicate minerals. It is characterized by its banded or foliated appearance, which results from the recrystallization of pre-existing rocks under high temperature and pressure. The mineral composition of gneiss often includes quartz, feldspar, and mica, all of which are silicates.


What is the mineral composition of arkose?

Arkose is a type of sandstone that contains more than 25% feldspar, along with quartz and other minerals like mica, magnetite, and hematite. The feldspar content gives arkose its distinct pinkish color.