What types of rocks are found in Tamilnadu?
As per the Department of Geology and Mining, a major part of the mineral wealth of Tamil Nadu is confined to Salem District, where a variety of important minerals like Magnesite, Dunite, Bauxite, Limestone, Iron ore, Quartz, Feldspar and Soapstone, Granites etc, are found.
What is found in pegmatite?
Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition as granite.
What is a pegmatite deposit?
Pegmatites are extreme igneous rocks that form during the final stage of a magma’s crystallization. They are extreme because they contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks.
What is basalt used for?
What is Basalt used for? Basalt is mainly used for structural building materials such as bricks, tiles, foundations and sculptures, as well as within stonewalls for thermal purposes and rail tracks. It can also be seen when looking at the moon as darker area which were formed from ancient lava flows.
Where is gypsum found in Tamil Nadu?
Gypsum in Coimbatore, Perambalur, Ramnathapuram, Tiruchirapalli, Tirunelveli, Thoothukudi & Virudhunagar districts.
What are the minerals in Tamil Nadu?
The district is rich in mineral deposits like Magnesite, Bauxite, Granite, Limestone, Quartz and Iron ore.
What is the age of pegmatite?
3 pegmatite are in ranges of 193–198 Ma, 184–187 Ma and 172–175 Ma, with weighted mean 206Pb–238U ages of 194.8 ± 2.3 Ma, 186.6 ± 1.3 Ma and 173.1 ± 3.9 Ma, respectively.
What is the state of basalt?
Basalt has high liquidus and solidus temperatures—values at the Earth’s surface are near or above 1200 °C (liquidus) and near or below 1000 °C (solidus); these values are higher than those of other common igneous rocks. The majority of tholeiitic basalts are formed at approximately 50–100 km depth within the mantle.