Some natural granite introduction

A dark acidic igneous rocks, commonly known as granite. Carbon dioxide content of more than 70%. Lighter in color, with gray, red concrete diamond blades  meat are more common. Mainly composed of quartz, feldspar and biotite and other dark mineral composition. Quartz content of 20% -40%, alkali feldspar than plagioclase feldspar total about 2/3 or more. For a variety of alkali feldspar and albite feldspar, plagioclase mainly sodium oligoclase or longer stone. Dark minerals are dominated by biotite, with hornblende. With porphyritic granite structure or structures. By containing mineral species can be divided into biotite granite, muscovite granite, hornblende granite core bits  granite, two-mica granite, etc., constructed according to the structure can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyritic granite, porphyritic Granite, geode granite and gneissic granite; according contain minerals can be divided into cassiterite granite, granite containing niobium, beryllium-containing granite, lithium mica granite, electrical granite. Common length petrochemical, greisenized tourmalinization other self metamorphism. Granite is a rock widely distributed in various geological era has outputs. Morphological mostly batholith, rock plants, rock bell. In Genesis, the view was expressed that the crust is deep granite granitic magma crystallization by condensation or crystallization of basaltic magma Plate Compactor  differentiation is made, it was considered to be the depth of metamorphism and metasomatism caused by the granite of the result. Many non-ferrous minerals such as copper, lead, zinc, tungsten, tin, bismuth, molybdenum, precious metals such as gold, silver and other metals, rare metals such as niobium, tantalum, beryllium, radioactive elements such as uranium, thorium, etc., are related to granite.