GRANITIZATION Meaning and
Definition
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Granitization is a geological process in which rocks undergo transformation into granite, a coarse-grained igneous rock composed mainly of quartz, feldspar, and mica. It typically occurs as a result of regional metamorphism, specifically under conditions of high temperature and pressure. During granitization, pre-existing rocks, such as sedimentary or metamorphic rocks, are subjected to extensive heat and pressure, leading to the recrystallization and rearrangement of minerals.
The process of granitization involves the complete or partial melting of the original rock, followed by its reconstitution into granite. This metamorphic process results in the growth of new minerals, often through the solid-state diffusion of elements, as well as the segregation of mineral phases. As the rock cools, the newly formed minerals crystallize, leading to the creation of characteristic large-sized crystals and a coarse-grained texture, which are distinguishing features of granite.
The principal minerals in granitization are quartz, feldspar (commonly orthoclase and plagioclase), and mica, although other accessory minerals may also be present. The specific composition of the granite produced depends on the original composition of the parent rock and the conditions of the metamorphic event.
Granitization is an essential process in the formation of many granite plutons, which are large bodies of granite rock that are often associated with mountain building and tectonic activity. Due to its durability, aesthetic appeal, and various applications in construction and art, granite is a highly valued material worldwide.
Etymology of GRANITIZATION
The word "granitization" is formed from the root word "granite" and the suffix "-ization".
The term "granite" originates from the Latin word "granum", which means grain or seed. This likely refers to the granular texture of the rock. In Old Italian, "granito" came to mean "grained" or "granular". Eventually, it entered English as "granite" to specifically refer to a common type of igneous rock composed mainly of quartz, feldspar, and mica.
The suffix "-ization" is derived from the Latin verb "-izare" or "-izare" in Old French, which both mean "to make" or "to cause to become". This suffix is commonly used to form nouns related to a process or conversion.
