Search results
Results from the WOW.Com Content Network
Mining in France is based solely on the nature of the material, whether extracted from the surface or underground. These include fuels (coal, hydrocarbons, gas), metals (iron, copper) and a few other minerals (salt, sulfur). The inventory of mining resources is relatively well known for surface and subsurface deposits.
Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg (CO 3) 2. It occurs widely, often in association with limestone and evaporites, though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 ...
Staurolite is a regional metamorphic mineral of intermediate to high grade. It occurs with almandine garnet, micas, kyanite; as well as albite, biotite, and sillimanite in gneiss and schist of regional metamorphic rocks. [7] It is the official state mineral of the U.S. state of Georgia and is also to be found in the Lepontine Alps in Switzerland.
Azurite. Azurite is a soft, deep-blue copper mineral produced by weathering of copper ore deposits. During the early 19th century, it was also known as chessylite, after the type locality at Chessy-les-Mines near Lyon, France. [3] The mineral, a basic carbonate with the chemical formula Cu 3 (CO 3) 2 (OH) 2, has been known since ancient times ...
Kyanite is a typically blue aluminosilicate mineral, found in aluminium -rich metamorphic pegmatites and sedimentary rock. It is the high pressure polymorph of andalusite and sillimanite, and the presence of kyanite in metamorphic rocks generally indicates metamorphism deep in the Earth's crust. Kyanite is also known as disthene or cyanite.
Baryte. Baryte, barite or barytes (/ ˈbæraɪt, ˈbɛər -/ BARR-eyet, BAIR-[7] or / bəˈraɪtiːz / bə-RYTE-eez[8]) is a mineral consisting of barium sulfate (Ba S O 4). [3] Baryte is generally white or colorless, and is the main source of the element barium. The baryte group consists of baryte, celestine (strontium sulfate), anglesite ...
Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. [2] Beryl has a hardness of 7.5–8 on the Mohs scale. [2] Most emeralds have many inclusions, [3] so their toughness (resistance to breakage) is classified as generally poor.
The Nord-Pas-de-Calais Mining Basin is a mining basin in Northern France that stretches across the Nord and Pas-de-Calais departments. The region is famous for its long history of coal extraction and its testimony to a significant period in the history of industrialisation in Europe, and as a result it was inscribed on the UNESCO World Heritage List in 2012. [1]