How to distinguish between type I and S granite
Type granite)
Granite is a kind of granite that is produced by partial melting and crystallization of the source rocks. "S" refers to the first letter of the word "sediment". Is an orogenic granite, produced in the craton inner ductile shear zone and the continental collision fold belt, with cordierite granite and two mica granite composition and other aluminum granite as the representative.
The difference between type I and S granites is that they form different source rocks.
I type granite (I type granite) is a series of quasi-aluminum calcium alkaline granite rock in general, mainly a variety of British cloud diorite to granite diorite and granite. The granite source rock material is not the weathering of the igneous rock melting, is the product of the continental edge of the event, referred to as I-type granite.
S-type granite (S type granite) is a source of sediment to the source rock, after part of the melting and crystallization of granite.
Granite (Granite), the main component of the continental crust, is a kind of magma in the surface below the formation of igneous rock [1], belonging to the deep intrusive rocks. Mainly in the form of minerals such as quartz or feldspar. The granite language is the Latin granum, meaning grain or grain. Because granite is a deep diagenetic, often able to form a well-developed, visually discernible mineral particles, hence the name. Granite is not easy to weathering, beautiful color, the appearance of color can be maintained for more than a century, because of its high hardness, wear resistance, in addition to the use of high-level architectural decoration works, hall floor, or open-air carving of the preferred material.
I type granite (I type
Granite) is a series of quasi-aluminum calc-alkaline granite rocks in general, mainly a variety of British cloud diorite to granite diorite and granite.
The initial definition of this granite is from the non-weathering igneous part of the melting, come to this understanding because the predecessors mistakenly believe that the dark structure with the dark particles of the body is the source of rock residues. At present, most scholars believe that the formation of I-type granite mantle contribution, dark particles inclusions are not the source area of the residue, but originated in the mantle, into the granitic magma in the basic magma group. Therefore, I-type granite is actually a mixture of shell-source magma and mantle-derived magma products. "I" is the first letter of the word Igneous. Which is characterized by consisting essentially of quartz, plagioclase and alkaline feldspar, common amphibole and biotite, and does not contain muscovite.
