What are the 3 kinds of minerals in granite?
Silica content in more than 70%. Lighter color, gray, flesh red is more common. It is mainly composed of dark minerals such as quartz, feldspar and a small amount of biotite. The content of quartz is 20% ~ 40%, and the alkali feldspar is more than plagioclase, which accounts for about 2 / 3 of the total amount of feldspar. Alkaline feldspar is a variety of K-feldspar and albite and plagioclase is mostly albite, feldspar or feldspar. Dark minerals are mainly biotite and contain small amounts of amphibole. With the structure or structure of porphyritic granite
A deep acid igneous rock. Granite. Silica content is more than 70%. Lighter in color, more commonly seen in gray and flesh red. It is mainly composed of dark minerals such as quartz, feldspar and a small amount of biotite. The content of quartz is 20% ~ 40%, and the alkali feldspar is more than plagioclase, which accounts for about 2 / 3 of the total amount of feldspar. Alkaline feldspar is a variety of K-feldspar and albite and plagioclase is mostly albite, feldspar or feldspar. Dark minerals are mainly biotite and contain small amounts of amphibole. With the structure or structure of porphyritic granite. According to the mineral species, can be divided into biotite granite and muscovite granite, hornblende granite, two mica granite; according to the structure, can be divided into fine grained granite, medium grained granite, coarse grained granite, porphyritic granite, granite, porphyritic MIAROLITIC granite and gneissic granite; in accordance with the vice minerals can be divided into cassiterite bearing granite, granite, iron containing niobium beryllium, lithium mica granite, granite tourmaline granite etc.. Common metamorphism of feldspar, dolomitization, electrical and petrochemical processes. Granite is a widely distributed rock, which has been produced in every geological age. Shape is rock, rock, rock clock line.
Granite is a deep acid igneous rock. Silica content is more than 70%. Light color, with gray, flesh red is common. It is mainly composed of dark minerals such as quartz, feldspar and a small amount of biotite. The content of quartz is 20%-40%, and alkaline feldspar accounts for more than 2/3 of total feldspar. Alkaline feldspar is a variety of K-feldspar and albite and plagioclase is mostly albite, feldspar or feldspar. Dark minerals are mainly biotite and contain small amounts of amphibole. Granite structure with typical or porphyritic structure. According to the mineral species can be divided into biotite granite and muscovite granite, hornblende granite, two mica granite; according to the structure can be divided into fine grained granite, medium grained granite, coarse grained granite, porphyritic granite, porphyritic granite, etc. in accordance with the MIAROLITIC granite; accessory minerals can be divided into cassiterite bearing granite niobium containing iron, granite, granite, beryllium containing lithium mica granite, tourmaline granite etc.. Granite is a widely distributed rock, which has been produced in every geological age. Shape is rock, rock, rock clock line.
In terms of causes, some people think that the granite is granite in the deep crust by condensing crystallization or by basaltic magma crystallization differentiation formed, some people think that is the result of granitification caused by deep metamorphism and metasomatism. Many nonferrous metal minerals, such as copper, lead, zinc, tungsten, tin, bismuth and molybdenum, are precious metals such as gold and silver. Rare metals such as niobium, tantalum and beryllium are related to granite, such as uranium and thorium. Granite structure is uniform, hard texture, beautiful color, is a high-quality building stone.
