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Glomel Andalusite Mine
The Glomel andalusite mine is a French mining site in Guerphalès in the commune of Glomel (Côtes-d'Armor, Brittany). The mineral extracted, andalusite, has been extracted there since 1970 and is mainly used for the manufacture of refractory materials due to its resistance to high temperatures. The mine operator, Imerys IMERYS S.A. is a French Multinational corporation, multinational company that specialises in the production and processing of industrial minerals. The main headquarters is located in Paris and are constituents of the CAC Mid 60 index. Groupe Bru ..., extracts 65,000 tonnes of andalusite each year, representing 20 to 25% of global production. Operation The Guerphalès deposit has the highest andalusite content in the world and its exploitation employs 110 people. Andalusite is extracted in the open pit, mainly from the third pit, using explosive blasts. The extracted blocks are transported to the plant where they are crushed and screened. The andalusite is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andalusite
Andalusite is an aluminium nesosilicate mineral with the chemical formula Al2SiO5. This mineral was called andalousite by Delamétherie, who thought it came from Andalusia, Spain. It soon became clear that it was a locality error, and that the specimens studied were actually from El Cardoso de la Sierra, in the Spanish province of Guadalajara, not Andalusia. Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph. At higher temperatures and pressures, andalusite may convert to sillimanite. Thus, as with its other polymorphs, andalusite is an aluminosilicate index mineral, providing clues to depth and pressures involved in producing the host rock. Varieties The variety chiastolite commonly contains dark inclusions of carbon or clay which form a cruciform pattern when shown in cross-section. This stone was known at least from the sixteenth century, being taken to many European countries, as a souvenir, by pilgrims returning fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glomel
Glomel (; ) is a communes of France, commune in the Côtes-d'Armor Departments of France, department in Brittany (administrative region), Brittany in northwestern France. The town is also home to the Glomel andalusite mine, Guerphelès andalusite mine, the largest andalusite mining site in Europe. Population Inhabitants of Glomel are called ''glomelois'' in French. Geography Glomel is located on the northern slope of the Montagnes Noires (french, Black Mountains). The Minez Du is the highest peak in the village. The village centre is located west of Rostrenen and north of Lorient. Geology The geology of Glomel is renowned for its exceptionally rich andalusite deposit, known for having the highest andalusite content in the world. This unique mineral, prized for its high-temperature resistance, has been extracted at the Glomel andalusite mine, Guerphalès mine since 1970. The site, operated by Imerys, plays a crucial role in the global andalusite market, producing 65,000 to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Côtes-d'Armor
The Côtes-d'Armor ( , ; ; , ), formerly known as Côtes-du-Nord until 1990 (, ), is a department in the north of Brittany, in northwestern France. In 2019, it had a population of 600,582.Populations légales 2019: 22 Côtes-d'Armor INSEE History French Revolution Côtes-du-Nord was one of the original 83 departments created on 4 March 1790 following the French Revolution. It was made up from the near entirety of the ancient Pays de Saint-Brieuc, most of historical[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andalusite
Andalusite is an aluminium nesosilicate mineral with the chemical formula Al2SiO5. This mineral was called andalousite by Delamétherie, who thought it came from Andalusia, Spain. It soon became clear that it was a locality error, and that the specimens studied were actually from El Cardoso de la Sierra, in the Spanish province of Guadalajara, not Andalusia. Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph. At higher temperatures and pressures, andalusite may convert to sillimanite. Thus, as with its other polymorphs, andalusite is an aluminosilicate index mineral, providing clues to depth and pressures involved in producing the host rock. Varieties The variety chiastolite commonly contains dark inclusions of carbon or clay which form a cruciform pattern when shown in cross-section. This stone was known at least from the sixteenth century, being taken to many European countries, as a souvenir, by pilgrims returning fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refractory
In materials science, a refractory (or refractory material) is a material that is resistant to decomposition by heat or chemical attack and that retains its strength and rigidity at high temperatures. They are inorganic, non-metallic compounds that may be porous or non-porous, and their crystallinity varies widely: they may be crystalline, polycrystalline, amorphous, or composite. They are typically composed of oxides, carbides or nitrides of the following elements: silicon, aluminium, magnesium, calcium, boron, chromium and zirconium. Many refractories are ceramics, but some such as graphite are not, and some ceramics such as clay pottery are not considered refractory. Refractories are distinguished from the '' refractory metals'', which are elemental metals and their alloys that have high melting temperatures. Refractories are defined by ASTM C71 as "non-metallic materials having those chemical and physical properties that make them applicable for structures, o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imerys
IMERYS S.A. is a French Multinational corporation, multinational company that specialises in the production and processing of industrial minerals. The main headquarters is located in Paris and are constituents of the CAC Mid 60 index. Groupe Bruxelles Lambert is the largest shareholder of Imerys. History The company was first founded in 1880, when the Rothschild family combined some of their metals and mining interests into the Spanish company Peñarroya. Over the next century it specialized in extracting and processing non-ferrous metals, becoming one of the world leaders in mining extraction. After operating as a stand-alone company, in 1970 Peñarroya branched out and merged with the Société Le Nickel (now Eramet) and Mokta (now Société Mokta El Hadid) and created a new holding company called Imétal to manage the new business. By the end of the 1990s, the company had become entirely focused on industrial mineral processing, following more acquisitions and a few divestme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Le Monde
(; ) is a mass media in France, French daily afternoon list of newspapers in France, newspaper. It is the main publication of Le Monde Group and reported an average print circulation, circulation of 480,000 copies per issue in 2022, including 40,000 sold abroad. It has been available online since 1995, and it is often the only French newspaper easily obtainable in non-French-speaking countries. It should not be confused with the monthly publication ', of which has 51% ownership but is editorially independent. is considered one of the French newspapers of record, along with ''Libération'' and . A Reuters Institute for the Study of Journalism, Reuters Institute poll in 2021 found that is the most trusted French newspaper. The paper's journalistic side has a collegial form of organization, in which most journalists are tenured, unionized, and financial stakeholders in the business. While shareholders appoint the company's CEO, the editor is elected by ''Le Monde''s journali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Mines In France
A surface, as the term is most generally used, is the outermost or uppermost layer of a physical object or space. It is the portion or region of the object that can first be perceived by an observer using the senses of sight and touch, and is the portion with which other materials first interact. The surface of an object is more than "a mere geometric solid", but is "filled with, spread over by, or suffused with perceivable qualities such as color and warmth". The concept of surface has been abstracted and formalized in mathematics, specifically in geometry. Depending on the properties on which the emphasis is given, there are several inequivalent such formalizations that are all called ''surface'', sometimes with a qualifier such as algebraic surface, smooth surface or fractal surface. The concept of surface and its mathematical abstractions are both widely used in physics, engineering, computer graphics, and many other disciplines, primarily in representing the surfaces of ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
