Mineralogical composition of rocks

Mineralogical composition of rocks
Rocks

1. Mineralogical composition of rocks

2. Igneous rocks The most common minerals found in igneous rocks include feldspars, quartz, mica, amphiboles, pyroxenes, and olivine. Feldspars are the most abundant mineral in igneous rocks, and they come in two main types: alkali feldspars (such as orthoclase and microcline) and plagioclase feldspars (such as albite and anorthite).

3. Rocks Essential Minerals Common Minerals Granite Quartz Hornblende,magnite,mica Syenite Quartz,orthoclase Hornblende,magnitite , biotite Diorite Quartz Hornblende,magnetite , biotite Gabbro Labradorite,augite,olivine Hornblende,ilmenite Dolerite Labradorite,augite,olivine Hornblende,ilmenite Basalt Labradorite,augite,olivine Hornblende,ilmenite

4. Sedimentary rocks Common minerals found in sedimentary rocks include quartz, feldspar, clay minerals, calcite, and dolomite. Quartz is often the most abundant mineral in sedimentary rocks, and it can occur as small grains or as large, well-rounded pebbles. Feldspars are also common in sedimentary rocks, and they typically occur as small, weathered grains

5. Rock Mineral composition Sandstone Mainly quartz with some CaCO3, iron oxides and clay Shale Clay minerals, quartz and some organic matter Limestone Mainly calcite with some dolomite, iron oxides, clay, phosphate and organic matter

6. Metamorphic rocks Common minerals found in metamorphic rocks include mica, chlorite, quartz, feldspar, garnet, staurolite, andalusite, and sillimanite. Mica minerals (such as biotite and muscovite) are common in many metamorphic rocks, and they typically form in thin, platy layers. Chlorite is another common mineral found in metamorphic rocks, and it can occur as small, green crystals.

7. Rock Mineral Composition Gneiss Formed from granite Schist Formed from basalt or shale Quartzite Formed from sandstone Slate Formed from shale Marble Formed from limestone