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Mining is the extraction of valuable geological materials and minerals from the surface of the Earth. Mining is required to obtain most materials that cannot be grown through agricultural processes, or feasibly created artificially in a laboratory or factory. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay. The ore must be a rock or mineral that contains valuable constituent, can be extracted or mined and sold for profit. Mining in a wider sense includes extraction of any non-renewable resource such as petroleum, natural gas, or even water.
Tombstone is a city in Cochise County, Arizona, United States, founded in 1879 by prospector Ed Schieffelin in what was then Pima County, Arizona Territory. It became one of the last boomtowns in the American frontier. The town grew significantly into the mid-1880s as the local mines produced $40 to $85 million in silver bullion, the largest productive silver district in Arizona. Its population grew from 100 to around 14,000 in less than seven years. It is best known as the site of the Gunfight at the O.K. Corral and presently draws most of its revenue from tourism.
Kongsberg is a historical mining town and municipality in Buskerud county, Norway. The city is located on the river Numedalslågen at the entrance to the valley of Numedal. Kongsberg has been a centre of silver mining, arms production and forestry for centuries, and is the site of high technology industry including the headquarters of Norway's largest defence contractor Kongsberg Gruppen.
Butte is a consolidated city-county and the county seat of Silver Bow County, Montana, United States. In 1977, the city and county governments consolidated to form the sole entity of Butte-Silver Bow. The city covers 718 square miles (1,860 km2), and, according to the 2020 census, has a population of 34,494, making it Montana's fifth-largest city. It is served by Bert Mooney Airport with airport code BTM.
Hidalgo del Parral is a city and seat of the municipality of Hidalgo del Parral in the Mexican state of Chihuahua. It is located in the southern part of the state, 220 kilometres (140 mi) from the state capital, the city of Chihuahua, Chihuahua. As of 2015, the city of Hidalgo del Parral had a population of 109,510 inhabitants, while the metro area had a population of 129,688 inhabitants. During the colonial period the city was a significant supplier of silver to the Spanish empire and was known as San José del Parral. The name of the city was changed after independence from Spain, in honour of Fr Miguel Hidalgo, widely considered the 'Father of the Country'.
Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its pure form (rare), it is typically a rose-red colour, but it can also be shades of pink to pale brown. It streaks white, and its Mohs hardness varies between 3.5 and 4.5. Its specific gravity is between 3.45 and 3.6. The crystal system of rhodochrosite is trigonal, with a structure and cleavage in the carbonate rhombohedral system. The carbonate ions (CO2−
3) are arranged in a triangular planar configuration, and the manganese ions (Mn2+) are surrounded by six oxygen ions in an octahedral arrangement. The MnO6 octahedra and CO3 triangles are linked together to form a three-dimensional structure. Crystal twinning is often present. It can be confused with the manganese silicate rhodonite, but is distinctly softer. Rhodochrosite is formed by the oxidation of manganese ore, and is found in South Africa, China, and the Americas. It is one of the national symbols of Argentina and the state of Colorado.
The akçe or akça was a silver coin which was the chief monetary unit of the Ottoman Empire and was once used by Aq Qoyunlu in the early period. The basic meaning of the word is "silver" or "silver money", deriving from the Turkish word ak and the diminutive suffix -ça. Three akçes were equal to one para. One-hundred and twenty akçes equalled one kuruş. Later after 1687 the kuruş became the main unit of account, replacing the akçe. In 1843, the silver kuruş was joined by the gold lira in a bimetallic system. Its weight fluctuated; one source estimates it between 1.15 and 1.18 grams. The name akçe originally referred to a silver coin but later the meaning changed and it became a synonym for money.
Potosí, known as Villa Imperial de Potosí in the colonial period, is the capital city and a municipality of the Department of Potosí in Bolivia. It is one of the highest cities in the world at a nominal 4,090 m (13,420 ft). For centuries, it was the location of the Spanish colonial silver mint. A considerable amount of the city's colonial architecture has been preserved in the historic center of the city, which—along with the globally important Cerro Rico de Potosí—are part of a designated UNESCO World Heritage Site.
Virginia City is a census-designated place (CDP) that is the county seat of Storey County, Nevada, and the largest community in the county. The city is a part of the Reno–Sparks Metropolitan Statistical Area.
The Comstock Lode is a lode of silver ore located under the eastern slope of Mount Davidson, a peak in the Virginia Range in Virginia City, Nevada, which was the first major discovery of silver ore in the United States and named after American miner Henry Comstock.
Oro Grande is an unincorporated community in the Mojave Desert of San Bernardino County, California, United States. It lies on the city boundary of Victorville and Adelanto. It is at 3,000 feet (910 m) elevation in Victor Valley north of the San Bernardino mountain range. It is located on old Route 66 near Interstate 15 between Victorville and Barstow. The ZIP code is 92368 and the community is inside area codes 442 and 760. Less than 1,000 residents live in the unincorporated area.
The Iwami Ginzan (石見銀山) was an underground silver mine in the city of Ōda, in Shimane Prefecture on the main island of Honshu, Japan. It was the largest silver mine in Japanese history. It was active for almost four hundred years, from its discovery in 1526 to its closing in 1923.
Coeur Mining, Inc. is a precious metals mining company listed on the New York Stock exchange. It operates five mines located in North America. Coeur employs 2,200 people and in 2012 it was the world's 9th largest silver producer. In 2013 the company changed its name to Coeur Mining, Inc. from Coeur d'Alene Mines and moved its head office to Chicago, Illinois from Coeur d'Alene, Idaho.
The Certej mine is an epithermal gold-silver deposit located in the Apuseni Mountains of Transylvania in western Romania. The deposit extends from surface and was previously mined as an open pit. Certej contains proven and probable reserves of approximately 2.5 million ounces of gold and 16.3 million ounces of silver.
The Cavnic mine is a large mine located in the northwest of Romania in Maramureș County, 26 km southwest of Baia Mare and 576 km north of the capital, Bucharest. Cavnic represents one of the largest polymetallic reserves in Romania having significant reserves of gold, silver, copper, lead and zinc amounting to 20 million tonnes of ore grading 1g/t gold, 30g/t silver, 2% lead, 3% zinc and 1% copper. The resources amount to 640,000 oz of gold, 19.2 million oz of silver, 400,000 tonnes of lead metal, 600,000 tonnes of zinc metal, and 200,000 tonnes of copper metal.
The Muncelu Mic mine was a large open pit mine in the western of Romania in Hunedoara County, 16 km southeast of Simeria and 387 km north-west of the capital, Bucharest. Muncelu Mic represents one of the largest iron ore reserves in Romania having estimated reserves of 6.5 million tonnes of ore. When it was operational it produced around 200,000 tonnes of iron ore/year. The mine also has a gold and silver reserves of around 5.4 million tonnes grading 1g/t gold and 8g/t silver resulting 173,000 oz of gold and 1.38 million oz of silver.
Wheaton Precious Metals Corp. is a Canadian multinational precious metals streaming company. It produces over 26 million ounces and sells over 29 million ounces of silver mined by other companies as a by-product of their main operations.
The Țarina mine is a large mine located in the west of Romania in Alba County. Țarina represents a large gold deposit with estimated reserves of 1.52 million oz of gold and 5.59 million oz of silver.
San Xavier is a populated place in Pima County, Arizona, United States, situated seventeen miles southwest of Tucson, and six miles northwest of Sahuarita. Originally a small silver mining camp from the 1880s, today San Xavier is little more than a collection of rural homes and partially abandoned mines. The ghost towns of Azurite and Mineral Hill were located about one mile north of San Xavier. Twin Buttes was five miles southeast.
The Great Bullion Famine was a shortage of precious metals that struck Europe in the 15th century, with the worst years of the famine lasting from 1457 to 1464. During the Middle Ages, gold and silver coins saw widespread use as currency in Europe, and facilitated trade with the Middle East and Asia; the shortage of these metals therefore became a problem for European economies. The main cause for the bullion famine was outflow of silver to the East unequaled by European mining output, although 15th century contemporaries believed the bullion famine to be caused by hoarding.
References
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