granite

In practice, granite (granite) is often used in a broader sense to denote all deep quartz-feldspar rocks, but these rocks should properly be labeled granitoids, respectively. granitoid or granitic rocks. In stone work, this term is used to describe several igneous and metamorphic rocks.

The name comes from the Latin word grannum, which means grain, a term used to describe granular, crystalline rocks. It was first used in literature by A. Cesalpinus in 1596. Granit
igneous rocks.

A sample of specialized S-type granite from the Súľova saddle area in the Volovské vrchy.

The name comes from the Latin word grannum, which means grain, a term used to describe granular, crystalline rocks. It was first used in literature by A. Cesalpinus in 1596.

The main minerals are quartz, plagioclase, orthoclase, biotite, muscovite

Accessories titanite, zircon, monazite, magnetite, tourmaline, apatite

Features

Texture - grainy

Color - white, gray, pinkish

Density 2.60 – 2.85[1] kg/dm3

Origin and origin

Granite is a deep igneous rock. It forms the greater part of the continental crust, the thickness of the granite layer is from 1.5 to 50 km. The method of ascent and placement of large volumes of granite in the upper parts of the continental crust is still the subject of debate among geologists. The formation processes of granitoid magma, which take place at great depths, cannot be observed due to the extreme temperature-pressure conditions as well as the time factor of their solidification, which can take millions of years. It is generally believed that granitoid magma solidifies at depths of around 10-20 km, too deep for these processes to be accessible to scientific observations. For a long time, there was a dispute between experts as to whether granitoids are formed by the splitting of basic magma from deeper parts of the crust and mantle, or their formation is also influenced by extreme metamorphism and anatexis, which leads to the melting of existing granulites, or amphibolites and gneisses. An important fact is that the chemical composition of granites and the most common rocks on the surface – clays, loams, phyllites, clasts and gneiss is almost identical. Laboratory experiments have shown that at a temperature of 650-800 °C and a pressure of around 200 MPa, they begin to melt and turn into a granite-like rock. The transitional rock in this series is migmatites.
Granite or granite is a felsic deep igneous rock whose essential mineral components are potassium feldspar, plagioclase, quartz and biotite. The collective name for granite and rocks similar to it (granodiorite and siliceous diorite) is granitoid. Granitoids cannot be accurately distinguished from each other with the naked eye without knowledge of the mineral composition.