Chemical Composition Of Marble Rocks

Formed from aluminous sedimentary rocks commonly shales and mudstones.

Chemical composition of marble rocks. Among foliated metamorphic rocks it represents a gradation in the degree of metamorphism between slate and schist. Phyllite is mainly composed of fine grains of mica minerals that are muscovite or sericite. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. Typically marble is composed of the following major constituents.

When the chemical analysis of an acid rock like granite and of a basic rock like basalt are compared important differences are seen such as the greater proportion of silica and alkalies na 2 o and k 2 o in the acid rock and. Using this system there are five main groupings. They originally formed as igneous rocks 1750 1780 million years ago. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble.

On the other hand crystals of. The mineral composition and colour of rocks are related to their chemical composition. These contain abundant micas. Dolomite is a common rock forming mineral.

Marble is a metamorphic rock composed of recrystallized carbonate minerals most commonly calcite or dolomite marble is typically not foliated although there are exceptions in geology the term marble refers to metamorphosed limestone but its use in stonemasonry more broadly encompasses unmetamorphosed limestone. Composition of igneous rocks. Marble is commonly used for sculpture and as a building material. It is a calcium magnesium carbonate with a chemical composition of camg co 3 2.

The exact chemical composition of marble will greatly vary dependong on the location and the minerals or impurities present in the limestone during recrystallization. It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is. Marble is a granular metamorphic rock it is derived from limestone or dolomite and it consists of a mass of interlocking grains of calcite or the mineral dolomite. Also fine grained feldspar and quartz are frequently major in phyllite.

Change in particle size of the rock during the process of metamorphism is called recrystallisation. Some of the most common metamorphic rocks include schist marble and gneiss. Limestone that contains some dolomite is known as dolomitic limestone. 38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32.

Form of it when limestone buried deep in the older layers of earth s crust is subjected to heat and pressure from thick layers of overlying sediments.