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Cananea Mine
The Buenavista mine, historically known as the Cananea copper mine, is a large open pit copper mine located in the north-west of Mexico in Cananea, Sonora. It lies south of the international border near Nogales, Arizona. Buenavista mine represents one of the largest copper reserves in Mexico and in the world. As of 2013, it had estimated reserves of 36 million tonnes of ore grading 0.69% copper, 3.3% zinc and 33.4 million oz of silver. Cananea represents one of the largest copper reserves in Mexico and in the world, having estimated reserves of 4.52 billion tonnes of ore with a grade of 0.42% copper. History Greene Consolidated Copper Company (1896-1907) Copper has been mined at the site continuously as far back as 1899. The mine was originally owned by the American businessman William Cornell Greene. The mine was the location of the Cananea strike in 1906. Anaconda Copper (1907-1972) The mine was run for some time by the American company Anaconda Copper. Government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Space Station
The International Space Station (ISS) is the largest modular space station currently in low Earth orbit. It is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada). The ownership and use of the space station is established by intergovernmental treaties and agreements. The station serves as a microgravity and space environment research laboratory in which scientific research is conducted in astrobiology, astronomy, meteorology, physics, and other fields. The ISS is suited for testing the spacecraft systems and equipment required for possible future long-duration missions to the Moon and Mars. The ISS programme evolved from the Space Station ''Freedom'', a 1984 American proposal to construct a permanently crewed Earth-orbiting station, and the contemporaneous Soviet/Russian '' Mir-2'' proposal from 1976 with similar aims. The ISS is the ninth space station to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grupo México
Grupo México is a Mexican conglomerate that operates through the following divisions: Mining (Minera Mexico), Transportation ( GMxT), Infrastructure and Fundacion Grupo Mexico. Its mining Division is the leading Copper producer in Mexico and the third largest copper producer in the world through ASARCO. Its transportation division operates the largest rail fleet in México, with 11,000 km of track and more than 800 engines and 26,300 coaches. It interconnects five major inland Mexican cities, five cities along the border with the United States, 13 seaports (5 on the Pacific Ocean, and 8 on the Gulf of Mexico). History The company was founded by Raúl Antonio Escobedo and Larrea Mota Velasco in 1978. After the government of Carlos Salinas declared the state mining company bankrupt, Larrea purchased key Mexican copper mines in Cananea and Nacozari (cities in the state of Sonora). He also purchased numerous other mining sites, including coal mines in the state of Coahuila. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silver Mines In Mexico
Silver is a chemical element with the Symbol (chemistry), symbol Ag (from the Latin ', derived from the Proto-Indo-European wikt:Reconstruction:Proto-Indo-European/h₂erǵ-, ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. The metal is found in the Earth's crust in the pure, free elemental form ("native silver"), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a byproduct of copper, gold, lead, and zinc Refining (metallurgy), refining. Silver has long been valued as a precious metal. Silver metal is used in many bullion coins, sometimes bimetallism, alongside gold: while it is more abundant than gold, it is much less abundant as a native metal. Its purity is typically measured on a per-mille basis; a 94%-pure alloy is described as "0.940 fine". As one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copper Mines In Mexico
Copper is a chemical element with the symbol Cu (from la, cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color. Copper is used as a conductor of heat and electricity, as a building material, and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins, and constantan used in strain gauges and thermocouples for temperature measurement. Copper is one of the few metals that can occur in nature in a directly usable metallic form (native metals). This led to very early human use in several regions, from circa 8000 BC. Thousands of years later, it was the first metal to be smelted from sulfide ores, circa 5000 BC; the first metal to be cast into a shape in a mold, c. 4000 BC; and the first metal to be purposely alloyed with another metal, tin, to create bronze, c. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Caridad Mine
La Caridad Mine is a large open-pit copper mine in Nacozari, Sonora, Mexico. It is operated by Mexicana de Cobre, S.A., which is a part of Grupo Mexico, the largest copper producer in Mexico. The mine lies approximately east of Nacozari de Garcia. Although the mine was worked in the 1800s, it was closed about 1948, and did not reopen until 1979. In 1985 the mine was producing over 72,000 metric tons of ore per day. In addition to copper, it produced silver Silver is a chemical element with the symbol Ag (from the Latin ', derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical ... as a byproduct, in 1995 that amounted to over 77 tons of silver. The mine was repurchased by investors from the Mexican government in 1988. The mine employed approximately 3,000 workers in 2000. In 2006 the mine was shut down due to labor strikes. See also * Buenavista m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office Of The United Nations High Commissioner For Human Rights
The Office of the United Nations High Commissioner for Human Rights, commonly known as the Office of the High Commissioner for Human Rights (OHCHR) or the United Nations Human Rights Office, is a department of the Secretariat of the United Nations that works to promote and protect human rights that are guaranteed under international law and stipulated in the Universal Declaration of Human Rights of 1948. The office was established by the United Nations General Assembly on 20 December 1993 in the wake of the 1993 World Conference on Human Rights. The office is headed by the High Commissioner for Human Rights, who co-ordinates human rights activities throughout the United Nations System and acts as the secretariat of the Human Rights Council in Geneva, Switzerland. The eighth and current High Commissioner is Volker Türk of Austria, who succeeded Michelle Bachelet of Chile on 8 September 2022. In 2018–2019, the department had a budget of $201.6 million (3.7 per cent of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Informador (Mexico)
''El Informador'' is an independent, daily newspaper published and headquartered in Guadalajara, Jalisco, Mexico. ''El Informador'' was founded by Jesús Álvarez del Castillo on October 5, 1917. The average daily circulation of the publishing group to which this newspaper belongs is 45,000 copies, of which 25,000 are subscriptions. This makes it the newspaper with the largest circulation in the state of Jalisco and the sixth largest in the country. See also * List of newspapers in Mexico A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby unio ... External links ''El Informador'' References Mass media in Guadalajara Newspapers published in Mexico Publications established in 1917 Spanish-language newspapers {{Mexico-newspaper-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyanide
Cyanide is a naturally occurring, rapidly acting, toxic chemical that can exist in many different forms. In chemistry, a cyanide () is a chemical compound that contains a functional group. This group, known as the cyano group, consists of a carbon atom triple-bonded to a nitrogen atom. In inorganic cyanides, the cyanide group is present as the anion . Soluble salts such as sodium cyanide (NaCN) and potassium cyanide (KCN) are highly toxic. Hydrocyanic acid, also known as hydrogen cyanide, or HCN, is a highly volatile liquid that is produced on a large scale industrially. It is obtained by acidification of cyanide salts. Organic cyanides are usually called nitriles. In nitriles, the group is linked by a covalent bond to carbon. For example, in acetonitrile (), the cyanide group is bonded to methyl (). Although nitriles generally do not release cyanide ions, the cyanohydrins do and are thus rather toxic. Bonding The cyanide ion is isoelectronic with carbon monoxi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sonora River
Río Sonora (''Sonora River'') is a 402-kilometer-long river of Mexico. It lies on the Pacific slope of the Mexican state of Sonora and it runs into the Gulf of California. Watershed The Sonora River watershed covers of public land. Slopes range from steep orientations in the upper part of the watershed to more gradual topographies in the valleys. The Sonora River watershed is subdivided into six smaller watersheds.Diego Valdez-Zamudio, Peter F. Folliott (2005) Agroforestry Practices in the Sonora River Watershed, Mexico. AFTA 2005 Conference Proceedings pp. 1-4 Ecology Biotic communities found within the watershed in order of importance by the area covered are the Sinaloan thornscrub, the plains of Sonora subdivision, semidesert grasslands, the Madrean evergreen woodland, and the central gulf coast subdivision. Average annual precipitation is which occurs in two seasons, late summer-early fall and winter-early spring. Physician naturalist Edgar Alexander Mearns' 1907 report o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
