Chemical Composition Of Marble Rocks

It is a calcium magnesium carbonate with a chemical composition of camg co 3 2.

Chemical composition of marble rocks.

Dolomite is a common rock forming mineral. 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. Using this system there are five main groupings.

These contain abundant micas. 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. Metamorphic rocks can also be classified according to the chemical composition of the original source rock protolith. Phyllite is mainly composed of fine grains of mica minerals that are muscovite or sericite.

Change in particle size of the rock during the process of metamorphism is called recrystallisation. Formed from aluminous sedimentary rocks commonly shales and mudstones. On the other hand crystals of. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism.

They originally formed as igneous rocks 1750 1780 million years ago. 38 42 lime cao 20 25 silica sio2 2 4 alumina al2o3 1 5 2 5 various oxides nao and mgo and 30 32. Typically marble is composed of the following major constituents. Composition of igneous rocks.

Also fine grained feldspar and quartz are frequently major in phyllite. Some of the most common metamorphic rocks include schist marble and gneiss. Marble is a metamorphic rock formed when limestone is subjected to high pressure or heat. In its pure form marble is a white stone with a crystalline and sugary appearance consisting of calcium carbonate caco 3 usually marble contains other minerals including quartz graphite pyrite and iron oxides these minerals can give marble a pink brown gray green or variegated coloration.

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. Limestone that contains some dolomite is known as dolomitic limestone. Marble is commonly used for sculpture and as a building material. Among foliated metamorphic rocks it represents a gradation in the degree of metamorphism between slate and schist.

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.