37°54′54.40″N 107°42′1.1″W / 37.9151111°N 107.700306°W / 37.9151111; -107.700306
100-745: The Idarado Mine was a mining operation in the San Juan Mountains of Ouray County, Colorado near the now- ghost town of Guston , producing primarily lead, zinc and silver along with small amounts of gold and copper. The mine is within the Sneffels-Red Mountain-Telluride mining district. The remains of the operation are visible from the Million Dollar Highway , north of Red Mountain Pass , between Ouray and Silverton, Colorado . The tunnels of
200-402: A concentration mill. A new, 250 ton-per-day selective flotation mill was built and by January of 1945 the mine was in full swing. Mill tailings were slurried out, flowing across a tailings suspension bridge across the gulch and creek, depositing them farther down the valley near the townsite of Ironton. Concentrates from the mill were trucked north to Montrose, where they were shipped by rail to
300-465: A concern as well, and where enforced, modern practices have significantly improved safety in mines. Unregulated, poorly regulated or illegal mining , especially in developing economies , frequently contributes to local human rights violations and environmental conflicts . Mining can also perpetuate political instability through resource conflicts . Since the beginning of civilization, people have used stone , clay and, later, metals found close to
400-901: A country's wealth; however, a sudden inflow of money caused by a resource boom can create social problems including inflation harming other industries (" Dutch disease ") and corruption, leading to inequality and underdevelopment, this is known as the " resource curse ". Extractive industries represent a large growing activity in many less-developed countries but the wealth generated does not always lead to sustainable and inclusive growth . People often accuse extractive industry businesses as acting only to maximize short-term value, implying that less-developed countries are vulnerable to powerful corporations. Alternatively, host governments are often assumed to be only maximizing immediate revenue . Researchers argue there are areas of common interest where development goals and business cross. These present opportunities for international governmental agencies to engage with
500-516: A fish, or it may be transformed by extractivist industries into an economically useful form that must be processed to obtain the resource such as metal ores , rare-earth elements , petroleum , timber and most forms of energy . Some resources are renewable , which means that they can be used at a certain rate and natural processes will restore them. In contrast, many extractive industries rely heavily on non-renewable resources that can only be extracted once. Natural resource allocations can be at
600-636: A hopper and a shaking screen or trommel which frees the desired minerals from the waste gravel. The minerals are then concentrated using sluices or jigs. Large drills are used to sink shafts, excavate stopes, and obtain samples for analysis. Trams are used to transport miners, minerals and waste. Lifts carry miners into and out of mines, and move rock and ore out, and machinery in and out, of underground mines. Huge trucks, shovels and cranes are employed in surface mining to move large quantities of overburden and ore. Processing plants use large crushers, mills, reactors, roasters and other equipment to consolidate
700-465: A major source of social unrest and conflicts in developing nations. At present, there is a particular concern for rainforest regions that hold most of the Earth's biodiversity. According to Nelson, deforestation and degradation affect 8.5% of the world's forests with 30% of the Earth's surface already cropped. If we consider that 80% of people rely on medicines obtained from plants and 3 ⁄ 4 of
800-883: A mass of actual rock. Both types of ore deposit, placer or lode, are mined by both surface and underground methods. Some mining, including much of the rare earth elements and uranium mining , is done by less-common methods, such as in-situ leaching : this technique involves digging neither at the surface nor underground. The extraction of target minerals by this technique requires that they be soluble, e.g., potash , potassium chloride , sodium chloride , sodium sulfate , which dissolve in water. Some minerals, such as copper minerals and uranium oxide , require acid or carbonate solutions to dissolve. Explosives in Mining Explosives have been used in surface mining and sub-surface mining to blast out rock and ore intended for processing. The most common explosive used in mining
900-426: A mining operation. Once the analysis determines a given ore body is worth recovering, development begins to create access to the ore body. The mine buildings and processing plants are built, and any necessary equipment is obtained. The operation of the mine to recover the ore begins and continues as long as the company operating the mine finds it economical to do so. Once all the ore that the mine can produce profitably
1000-503: A more sustainable future, the demand for metals is set to skyrocket. Between 2022 and 2050, an estimated 7 billion metric tons of metals will need to be extracted. Steel will account for the largest portion of this total at 5 billion tons, followed by aluminum at 950 million tons, copper at 650 million tons, graphite at 170 million tons, nickel at 100 million tons, and other metals. Notably, the energy expenditure required to extract these metals will soon surpass that of coal mining, highlighting
1100-529: A move that would lay off all 230 workers. Just before Telluride Mines proposed closing date, Newmont Mining announced they had purchased all of Telluride Mine's holdings. The miners of Telluride were saved. Once Newmont had control of all the other major mines working on the same vein structure, they were able to extend their workings from under the Black Bear and connect with the raises Telluride Mines had already created. Once completed, miners could pass all
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#17327732515791200-507: A new ore body which helped make the mine profitable again. 1973 - 1974 was a again a boom time for the mine. Idarado was hiring anyone willing to work. The mine was running around the clock, blasting through 80,000 pounds of dynamite per week. 1974 saw their best financials yet, with a reported $ 21,000,000 in sales. With over 500 employees, Idarado was now the second biggest mine in Colorado behind Climax Molybdenum, near Leadville. 1975
1300-408: A strong inducement to extract these metals or to lease the deposits and collect royalties from mine operators. English, German , and Dutch capital combined to finance extraction and refining . Hundreds of German technicians and skilled workers were brought over; in 1642 a colony of 4,000 foreigners was mining and smelting copper at Keswick in the northwestern mountains. Use of water power in
1400-628: A tunnel at mill-level, into the mountain and created raises to connect with the Smuggler-Union workings, along with others. Telluride Mines controlled most of the other historic producers as well, including the Liberty Bell, Tomboy, Ajax, Argentine and Montana. In 1953 metal prices took a dive. Telluride mines was financially weak and unable to remain open given the low metal prices. They announced their impending closing in April of 1953,
1500-515: A wider sense includes extraction of any non-renewable resource such as petroleum , natural gas , or even water . Modern mining processes involve prospecting for ore bodies, analysis of the profit potential of a proposed mine, extraction of the desired materials, and final reclamation or restoration of the land after the mine is closed. Mining materials are often obtained from ore bodies, lodes , veins , seams , reefs , or placer deposits . The exploitation of these deposits for raw materials
1600-651: Is ammonium nitrate . Between 1870 and 1920, in Queensland Australia, an increase in mining accidents lead to more safety measures surrounding the use of explosives for mining. In the United States of America, between 1990 and 1999, about 22.3 billion kilograms of explosives were used in mining quarrying and other industries; Moreover " coal mining used 66.4%, nonmetal mining and quarrying 13.5%, metal mining 10.4%, construction 7.1%, and all other users 2.6%". Artisanal and small-scale mining (ASM)
1700-811: Is a blanket term for a type of subsistence mining involving a miner who may or may not be officially employed by a mining company but works independently, mining minerals using their own resources, usually by hand. While there is no completely coherent definition for ASM, artisanal mining generally includes miners who are not officially employed by a mining company and use their own resources to mine. As such, they are part of an informal economy . ASM also includes, in small-scale mining, enterprises or individuals that employ workers for mining, but who generally still use similar manually-intensive methods as artisanal miners (such as working with hand tools). In addition, ASM can be characterized as distinct from large-scale mining (LSM) by less efficient extraction of pure minerals from
1800-515: Is a type of land management that seeks to conserve , protect and restore habitat areas for wild plants and animals , especially conservation reliant species , and prevent their extinction, fragmentation or reduction in range . Natural resource management is a discipline in the management of natural resources such as land, water , soil , plants , and animals —with a particular focus on how management affects quality of life for present and future generations. Hence, sustainable development
1900-438: Is another factor causing depletion of natural resources. For example, the depletion of nutrients in the soil due to excessive use of nitrogen and desertification . The depletion of natural resources is a continuing concern for society. This is seen in the cited quote given by Theodore Roosevelt , a well-known conservationist and former United States president, who was opposed to unregulated natural resource extraction. In 1982,
2000-510: Is considered a sustainable development issue. The term sustainable development has many interpretations, most notably the Brundtland Commission's 'to ensure that it meets the needs of the present without compromising the ability of future generations to meet their own needs'; however, in broad terms it is balancing the needs of the planet's people and species now and in the future. In regards to natural resources, depletion
2100-506: Is dependent on investment, labor, energy, refining, and transportation cost. Mining operations can create a negative environmental impact, both during the mining activity and after the mine has closed. Hence, most of the world's nations have passed regulations to decrease the impact; however, the outsized role of mining in generating business for often rural, remote or economically depressed communities means that governments often fail to fully enforce such regulations. Work safety has long been
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#17327732515792200-476: Is done by removing surface vegetation, dirt, and bedrock to reach buried ore deposits. Techniques of surface mining include: open-pit mining , which is the recovery of materials from an open pit in the ground; quarrying , identical to open-pit mining except that it refers to sand, stone and clay; strip mining , which consists of stripping surface layers off to reveal ore underneath; and mountaintop removal , commonly associated with coal mining, which involves taking
2300-417: Is followed according to the judicious use of resources to supply present and future generations. The disciplines of fisheries, forestry, and wildlife are examples of large subdisciplines of natural resource management. Management of natural resources involves identifying who has the right to use the resources and who does not to define the management boundaries of the resource. The resources may be managed by
2400-613: Is mining upward, creating a sloping underground room, long wall mining , which is grinding a long ore surface underground, and room and pillar mining, which is removing ore from rooms while leaving pillars in place to support the roof of the room. Room and pillar mining often leads to retreat mining , in which supporting pillars are removed as miners retreat, allowing the room to cave in, thereby loosening more ore. Additional sub-surface mining methods include hard rock mining , bore hole mining, drift and fill mining, long hole slope mining, sub level caving, and block caving . Heavy machinery
2500-484: Is much more common, and produces, for example, 85% of minerals (excluding petroleum and natural gas) in the United States, including 98% of metallic ores. Targets are divided into two general categories of materials: placer deposits , consisting of valuable minerals contained within river gravels, beach sands, and other unconsolidated materials ; and lode deposits , where valuable minerals are found in veins, in layers, or in mineral grains generally distributed throughout
2600-413: Is not of immediate interest to the miner. The total movement of ore and waste constitutes the mining process. Often more waste than ore is mined during the life of a mine, depending on the nature and location of the ore body. Waste removal and placement is a major cost to the mining operator, so a detailed characterization of the waste material forms an essential part of the geological exploration program for
2700-596: Is of concern for sustainable development as it has the ability to degrade current environments and the potential to impact the needs of future generations. "The conservation of natural resources is the fundamental problem. Unless we solve that problem, it will avail us little to solve all others." Theodore Roosevelt Depletion of natural resources is associated with social inequity . Considering most biodiversity are located in developing countries, depletion of this resource could result in losses of ecosystem services for these countries. Some view this depletion as
2800-584: Is recovered, reclamation can begin, to make the land used by the mine suitable for future use. Technical and economic challenges notwithstanding, successful mine development must also address human factors. Working conditions are paramount to success, especially with regard to exposures to dusts, radiation, noise, explosives hazards, and vibration, as well as illumination standards. Mining today increasingly must address environmental and community impacts, including psychological and sociological dimensions. Thus, mining educator Frank T. M. White (1909–1971), broadened
2900-656: Is the largest producer of diamonds in Africa, with an estimated 12 million carats in 2019. Other types of mining reserves in Africa include cobalt , bauxite , iron ore , coal, and copper . Gold and coal mining started in Australia and New Zealand in the 19th century. Nickel has become important in the economy of New Caledonia . In Fiji , in 1934, the Emperor Gold Mining Company Ltd. established operations at Vatukoula , followed in 1935 by
3000-666: Is the scientific study of the nature and status of Earth's biodiversity with the aim of protecting species , their habitats , and ecosystems from excessive rates of extinction . It is an interdisciplinary subject drawing on science, economics and the practice of natural resource management . The term conservation biology was introduced as the title of a conference held at the University of California, San Diego , in La Jolla, California, in 1978, organized by biologists Bruce A. Wilcox and Michael E. Soulé . Habitat conservation
3100-423: Is to conduct a feasibility study to evaluate the financial viability, the technical and financial risks, and the robustness of the project. This is when the mining company makes the decision whether to develop the mine or to walk away from the project. This includes mine planning to evaluate the economically recoverable portion of the deposit, the metallurgy and ore recoverability, marketability and payability of
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3200-419: Is used in mining to explore and develop sites, to remove and stockpile overburden, to break and remove rocks of various hardness and toughness, to process the ore, and to carry out reclamation projects after the mine is closed. Bulldozers, drills, explosives and trucks are all necessary for excavating the land. In the case of placer mining , unconsolidated gravel, or alluvium , is fed into machinery consisting of
3300-521: The Greek author Diodorus Siculus , who mentions fire-setting as one method used to break down the hard rock holding the gold . One of the complexes is shown in one of the earliest known mining maps. The miners crushed the ore and ground it to a fine powder before washing the powder for the gold dust known as the dry and wet attachment processes. Mining in Europe has a very long history. Examples include
3400-583: The United Nations developed the World Charter for Nature , which recognized the need to protect nature from further depletion due to human activity. It states that measures must be taken at all societal levels, from international to individual, to protect nature. It outlines the need for sustainable use of natural resources and suggests that the protection of resources should be incorporated into national and international systems of law. To look at
3500-517: The argentiferous galena in the mines of Cartagena ( Cartago Nova ), Linares ( Castulo ), Plasenzuela and Azuaga , among many others. Spain was one of the most important mining regions, but all regions of the Roman Empire were exploited. In Great Britain the natives had mined minerals for millennia , but after the Roman conquest , the scale of the operations increased dramatically, as
3600-836: The greenstone of the Langdale axe industry based in the English Lake District . The oldest-known mine on archaeological record is the Ngwenya Mine in Eswatini (Swaziland) , which radiocarbon dating shows to be about 43,000 years old. At this site Paleolithic humans mined hematite to make the red pigment ochre . Mines of a similar age in Hungary are believed to be sites where Neanderthals may have mined flint for weapons and tools. Ancient Egyptians mined malachite at Maadi . At first, Egyptians used
3700-552: The private sector and host governments through revenue management and expenditure accountability, infrastructure development, employment creation , skills and enterprise development , and impacts on children, especially girls and women. A strong civil society can play an important role in ensuring the effective management of natural resources. Norway can serve as a role model in this regard as it has good institutions and open and dynamic public debate with strong civil society actors that provide an effective checks and balances system for
3800-457: The 21st century begins, a globalized mining industry of large multinational corporations has arisen. Peak minerals and environmental impacts have also become a concern. Different elements, particularly rare-earth minerals , have begun to increase in demand as a result of new technologies. In 2023, 8.5 billion metric tons of coal were extracted from the Earth's crust. However, as the global economy transitions away from fossil fuels and toward
3900-680: The 7th century to the 14th century. Gold was often traded to Mediterranean economies that demanded gold and could supply salt , even though much of Africa was abundant with salt due to the mines and resources in the Sahara desert . The trading of gold for salt was mostly used to promote trade between the different economies. Since the Great Trek in the 19th century, after, gold and diamond mining in Southern Africa has had major political and economic impacts. The Democratic Republic of Congo
4000-524: The Earth's surface. These were used to make early tools and weapons; for example, high quality flint found in northern France , southern England and Poland was used to create flint tools . Flint mines have been found in chalk areas where seams of the stone were followed underground by shafts and galleries. The mines at Grimes Graves and Krzemionki are especially famous, and like most other flint mines, are Neolithic in origin (c. 4000–3000 BC). Other hard rocks mined or collected for axes included
4100-675: The French crown to operate mines in 1733, becoming "the first practical miner on Lake Superior"; seven years later, mining was halted by an outbreak between Sioux and Chippewa tribes. Mining in the United States became widespread in the 19th century, and the United States Congress passed the General Mining Act of 1872 to encourage mining of federal lands. As with the California Gold Rush in
Idarado Mine - Misplaced Pages Continue
4200-586: The Idarado extend some 5 miles (8 km) west under 13,000 foot (4,000 m) mountains to the Pandora Mill near Telluride , a trip of more than 60 miles (100 km) by highway. The mine was a consolidation of several previously inactive mines interconnected via the Treasury Tunnel. The "Treasury Tunnel Mining and Reduction Company" was created in 1896 by mine developer William Hammond Jr., with
4300-643: The Loloma Gold Mines, N.L., and then by Fiji Mines Development Ltd. (aka Dolphin Mines Ltd.). These developments ushered in a “mining boom”, with gold production rising more than a hundred-fold, from 931.4 oz in 1934 to 107,788.5 oz in 1939, an order of magnitude then comparable to the combined output of New Zealand and Australia's eastern states. During prehistoric times, early Americans mined large amounts of copper along Lake Superior 's Keweenaw Peninsula and in nearby Isle Royale ; metallic copper
4400-739: The Pandora mill stand as evidence of 100 years of mining and milling in Telluride. "Mountains of Silver: Life in Colorado's Red Mountain Mining District" - P. David Smith "Miles of Tunnels. A Brief History of the Idarado Mine" - Samantha Tisdel Wright. Published in the Telluride Daily Planet] Mining Mining is the extraction of valuable geological materials and minerals from
4500-481: The Romans needed Britannia 's resources, especially gold , silver , tin , and lead . Roman techniques were not limited to surface mining. They followed the ore veins underground once opencast mining was no longer feasible. At Dolaucothi they stoped out the veins and drove adits through bare rock to drain the stopes. The same adits were also used to ventilate the workings, especially important when fire-setting
4600-618: The San Juans, looking for sources of base metals to assist America's allies in Europe, already embroiled in the opening months of WW2. Newmont's lead exploration geologist/executive, Fred Searls, recommended utilizing the old Treasury Tunnel, extending it to intercept the Barstow and the Black Bear Mines. Searls recognized the Barstow and Black Bear still possessed large reserves of lead and zinc beneath their historic workings, which
4700-598: The Spanish to pulverize ore after being mined. This device was powered by animals and used the same principles used for grain threshing . Much of the knowledge of medieval mining techniques comes from books such as Biringuccio 's De la pirotechnia and probably most importantly from Georg Agricola 's De re metallica (1556). These books detail many different mining methods used in German and Saxon mines. A prime issue in medieval mines, which Agricola explains in detail,
4800-524: The Treasury mill. in 1956 the Pandora mill was refitted with new equipment and put into service. Their timing was fortunate as the Treasury Mill burned down shortly thereafter. After further underground development of several ore passes, ore produced could be trammed towards Telluride and dumped down the nearest ore pass, dropping by gravity to the mill level tunnel where it was loaded and hauled
4900-756: The Umm el-Sawwan site; gypsum was used to make funerary items for private tombs. Other minerals mined in Egypt from the Old Kingdom (2649-2134 BC) until the Roman Period (30 BC-AD 395) including granite , sandstone , limestone , basalt , travertine , gneiss , galena , and amethyst . Mining in Egypt occurred in the earliest dynasties. The gold mines of Nubia were among the largest and most extensive of any in Ancient Egypt. These mines are described by
5000-528: The bright green malachite stones for ornamentations and pottery . Later, between 2613 and 2494 BC, large building projects required expeditions abroad to the area of Wadi Maghareh in order to secure minerals and other resources not available in Egypt itself. Quarries for turquoise and copper were also found at Wadi Hammamat , Tura , Aswan and various other Nubian sites on the Sinai Peninsula and at Timna . Quarries for gypsum were found at
5100-771: The centre of many economic and political confrontations both within and between countries. This is particularly true during periods of increasing scarcity and shortages ( depletion and overconsumption of resources). Resource extraction is also a major source of human rights violations and environmental damage. The Sustainable Development Goals and other international development agendas frequently focus on creating more sustainable resource extraction, with some scholars and researchers focused on creating economic models, such as circular economy , that rely less on resource extraction, and more on reuse , recycling and renewable resources that can be sustainably managed. There are various criteria for classifying natural resources. These include
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#17327732515795200-417: The cutter-head is progressively launched further into the coal seam. High wall mining can produce thousands of tons of coal in contour-strip operations with narrow benches, previously mined areas, trench mine applications and steep-dip seams. Sub-surface mining consists of digging tunnels or shafts into the earth to reach buried ore deposits. Ore, for processing, and waste rock, for disposal, are brought to
5300-698: The focus to the “total environment of mining”, including reference to community development around mining, and how mining is portrayed to an urban society, which depends on the industry, although seemingly unaware of this dependency. He stated, “[I]n the past, mining engineers have not been called upon to study the psychological, sociological and personal problems of their own industry – aspects that nowadays are assuming tremendous importance. The mining engineer must rapidly expand his knowledge and his influence into these newer fields.” Mining techniques can be divided into two common excavation types: surface mining and sub-surface (underground) mining . Today, surface mining
5400-487: The form of water mills was extensive. The water mills were employed in crushing ore, raising ore from shafts, and ventilating galleries by powering giant bellows . Black powder was first used in mining in Selmecbánya , Kingdom of Hungary (now Banská Štiavnica , Slovakia) in 1627. Black powder allowed blasting of rock and earth to loosen and reveal ore veins. Blasting was much faster than fire-setting and allowed
5500-567: The government as in Norway's case, natural resources can actually be a factor in whether a civil war starts and how long the war lasts. In recent years, the depletion of natural resources has become a major focus of governments and organizations such as the United Nations (UN). This is evident in the UN's Agenda 21 Section Two, which outlines the necessary steps for countries to take to sustain their natural resources. The depletion of natural resources
5600-510: The government's management of extractive industries, such as the Extractive Industries Transparency Initiative (EITI), a global standard for the good governance of oil, gas and mineral resources. It seeks to address the key governance issues in the extractive sectors. However, in countries that do not have a very strong and unified society, meaning that there are dissidents who are not as happy with
5700-400: The growing importance of sustainable metal extraction practices. The process of mining from discovery of an ore body through extraction of minerals and finally to returning the land to its natural state consists of several distinct steps. The first is discovery of the ore body, which is carried out through prospecting or exploration to find and then define the extent, location and value of
5800-521: The hope exploiting ore deposits thought to exist between the mines of Red Mountain and Telluride. Hammond believed a parallel vein structure existed to the veins the mines above Telluride were working. He drove the Treasury Tunnel approximately 2000' into the mountain in the belief he'd intercept the vein. Hammond's venture did find some ore, but he never struck it rich. The tunnel operated for about 10 years with limited success before being abandoned. In 1939, mining giant Newmont Mining began exploration in
5900-661: The importance of protecting natural resources further, the World Ethic of Sustainability, developed by the IUCN , WWF and the UNEP in 1990, set out eight values for sustainability, including the need to protect natural resources from depletion. Since the development of these documents, many measures have been taken to protect natural resources including establishment of the scientific field and practice of conservation biology and habitat conservation, respectively. Conservation biology
6000-535: The metals due to the difficulties of transporting them, but the copper was eventually traded throughout the continent along major river routes. In the early colonial history of the Americas, "native gold and silver was quickly expropriated and sent back to Spain in fleets of gold- and silver-laden galleons", the gold and silver originating mostly from mines in Central and South America. Turquoise dated at 700 AD
6100-768: The mid-19th century, mining for minerals and precious metals, along with ranching , became a driving factor in the U.S. Westward Expansion to the Pacific coast. With the exploration of the West, mining camps sprang up and "expressed a distinctive spirit, an enduring legacy to the new nation"; Gold Rushers would experience the same problems as the Land Rushers of the transient West that preceded them. Aided by railroads, many people traveled West for work opportunities in mining. Western cities such as Denver and Sacramento originated as mining towns. When new areas were explored, it
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#17327732515796200-497: The mid-sixteenth century. On the continent, mineral deposits belonged to the crown, and this regalian right was stoutly maintained. But in England, royal mining rights were restricted to gold and silver (of which England had virtually no deposits) by a judicial decision of 1568 and a law in 1688. England had iron , zinc , copper , lead , and tin ores. Landlords who owned the base metals and coal under their estates then had
6300-424: The mine could go into production though. Miners build ore shoots, laid rail, strung electrical and ventilation, drifted on the ore body in preparation for stopeing the veins. By the time the mine was ready to produce, WW2 was in its final year. In June of 1944 Newmont bought back the lease on Idarado from the federal government, repaying the cost of the Treasury extension. The mine was ready to produce, but needed
6400-432: The minehead, where the water was stored in large reservoirs and tanks. When a full tank was opened, the flood of water sluiced away the overburden to expose the bedrock underneath and any gold-bearing veins. The rock was then worked by fire-setting to heat the rock, which would be quenched with a stream of water. The resulting thermal shock cracked the rock, enabling it to be removed by further streams of water from
6500-617: The mineral-rich material and extract the desired compounds and metals from the ore. Resource extraction Natural resources are resources that are drawn from nature and used with few modifications. This includes the sources of valued characteristics such as commercial and industrial use, aesthetic value, scientific interest, and cultural value. On Earth , it includes sunlight , atmosphere , water , land , all minerals along with all vegetation , and wildlife . Natural resources are part of humanity's natural heritage or protected in nature reserves . Particular areas (such as
6600-431: The mining of previously impenetrable metals and ores. In 1762, one of the world's first mining academies was established in the same town there. The widespread adoption of agricultural innovations such as the iron plowshare , as well as the growing use of metal as a building material, was also a driving force in the tremendous growth of the iron industry during this period. Inventions like the arrastra were often used by
6700-404: The nature of the shared resources, the individuals who are affected by the rules can participate in setting or changing them. The users have rights to devise their own management institutions and plans under the recognition by the government. The right to resources includes land, water, fisheries, and pastoral rights. The users or parties accountable to the users have to actively monitor and ensure
6800-473: The ore body, far away from the mill. Eventually Idarado succumbed to the financial hemorrhage and closed their doors for good on September 30th, 1978. Beginning in the 1980s, reclamation efforts took place at the mill-tailings ponds near the mine and farther north down the valley, near the old Ironton town site. The old tailings ponds can still be seen just off the highway, appearing now as flat, grassy meadows. The same flat mill tailings piles seen near
6900-405: The ore body. This leads to a mathematical resource estimation to estimate the size and grade of the deposit. This estimation is used to conduct a pre-feasibility study to determine the theoretical economics of the ore deposit. This identifies, early on, whether further investment in estimation and engineering studies is warranted and identifies key risks and areas for further work. The next step
7000-462: The ore concentrates, engineering concerns, milling and infrastructure costs, finance and equity requirements, and an analysis of the proposed mine from the initial excavation all the way through to reclamation. The proportion of a deposit that is economically recoverable is dependent on the enrichment factor of the ore in the area. To gain access to the mineral deposit within an area it is often necessary to mine through or remove waste material which
7100-442: The ore, lower wages, decreased occupational safety, benefits, and health standards for miners, and a lack of environmental protection measures. Artisanal miners often undertake the activity of mining seasonally. For example, crops are planted in the rainy season , and mining is pursued in the dry season . However, they also frequently travel to mining areas and work year-round. There are four broad types of ASM: Surface mining
7200-570: The overhead tanks. The Roman miners used similar methods to work cassiterite deposits in Cornwall and lead ore in the Pennines . Sluicing methods were developed by the Romans in Spain in 25 AD to exploit large alluvial gold deposits, the largest site being at Las Medulas , where seven long aqueducts tapped local rivers and sluiced the deposits. The Romans also exploited the silver present in
7300-558: The previous mine owners had not exploited as it was uneconomical. At Searls direction, Newmont began buying outright, or leasing, most of the old mining claims in the area. He convinced another mining company, the Sunshine Mining Company from Wallace, Idaho to form a joint venture. Development of their new mine was now up and running. They named it "Idarado Mining Company" to reflect the partnership of both companies. Big changes were soon in store for Idarado. After
7400-510: The rainforest in Fatu-Hiva ) often feature biodiversity and geodiversity in their ecosystems. Natural resources may be classified in different ways. Natural resources are materials and components (something that can be used) found within the environment. Every man-made product is composed of natural resources (at its fundamental level). A natural resource may exist as a separate entity such as freshwater, air , or any living organism such as
7500-431: The remaining part of a coal seam previously exploited by other surface-mining techniques has too much overburden to be removed but can still be profitably exploited from the side of the artificial cliff made by previous mining. A typical cycle alternates sumping, which undercuts the seam, and shearing, which raises and lowers the cutter-head boom to cut the entire height of the coal seam. As the coal recovery cycle continues,
7600-446: The shafts could no longer be pumped dry with the available technology. Although an increased use of banknotes , credit and copper coins during this period did decrease the value of, and dependence on, precious metals , gold and silver still remained vital to the story of medieval mining. Due to differences in the social structure of society, the increasing extraction of mineral deposits spread from central Europe to England in
7700-406: The short distance to the Pandora Mill. This was a very economical and convenient method of ore handling. By 1959 Idarado was producing 400,000 tons of ore annually. Idarado operated profitably until 1971, when the combination of low metal prices, a strike at the smelters, and a labor shortage in Telluride caused it to be unable to turn a profit. Things rebounded, and by 1973 Idarado had struck
7800-567: The silver mines of Laurium , which helped support the Greek city state of Athens . Although they had over 20,000 slaves working them, their technology was essentially identical to their Bronze Age predecessors. At other mines, such as on the island of Thassos , marble was quarried by the Parians after they arrived in the 7th century BC. The marble was shipped away and was later found by archaeologists to have been used in buildings including
7900-451: The smelter. Newmont Mining, finally seeing profits from the mine coming in, bought out Sunshine Mining's stake in Idarado, becoming the sole owner. On the Telluride side of the mountain, another company, Telluride Mines Inc., had been developing its own properties. Telluride Mines owned the fabled Smuggler-Union mine and mill, which had been one of the top gold producers in the mining district in previous years. Telluride Mines had driven
8000-591: The source of origin, stages of development, renewability and ownership . Resource extraction involves any activity that withdraws resources from nature. This can range in scale from the traditional use of preindustrial societies to global industry. Extractive industries are, along with agriculture, the basis of the primary sector of the economy. Extraction produces raw material , which is then processed to add value . Examples of extractive industries are hunting , trapping , mining , oil and gas drilling , and forestry . Natural resources can add substantial amounts to
8100-803: The start of America's involvement in WW2, the nation needed lead, zinc and copper - strategic metals needed for the war effort. In 1942, the War Production Board Order L-208, went into effect, shutting down gold mines to reallocate the resources and manpower that gold mining was consuming. Shortly thereafter, the War Production Board created the Domestic Metals Procurement Program in 1943 to financially assist mine owners with developing base metal mines as quickly as possible. The Idarado mine
8200-537: 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
8300-474: The surface through the tunnels and shafts. Sub-surface mining can be classified by the type of access shafts used, and the extraction method or the technique used to reach the mineral deposit. Drift mining uses horizontal access tunnels, slope mining uses diagonally sloping access shafts, and shaft mining uses vertical access shafts. Mining in hard and soft rock formations requires different techniques. Other methods include shrinkage stope mining , which
8400-602: The tomb of Amphipolis. Philip II of Macedon , the father of Alexander the Great , captured the gold mines of Mount Pangeo in 357 BC to fund his military campaigns. He also captured gold mines in Thrace for minting coinage, eventually producing 26 tons per year. However, it was the Romans who developed large-scale mining methods, especially the use of large volumes of water brought to the minehead by numerous aqueducts . The water
8500-448: The top of a mountain off to reach ore deposits at depth. Most placer deposits, because they are shallowly buried, are mined by surface methods. Finally, landfill mining involves sites where landfills are excavated and processed. Landfill mining has been thought of as a long-term solution to methane emissions and local pollution. High wall mining, which evolved from auger mining, is another form of surface mining. In high wall mining,
8600-628: The top slats. Many examples of such devices have been found in old Roman mines and some examples are now preserved in the British Museum and the National Museum of Wales . Mining as an industry underwent dramatic changes in medieval Europe . The mining industry in the early Middle Ages was mainly focused on the extraction of copper and iron . Other precious metals were also used, mainly for gilding or coinage. Initially, many metals were obtained through open-pit mining , and ore
8700-443: The users according to the rules governing when and how the resource is used depending on local condition or the resources may be managed by a governmental organization or other central authority. A "...successful management of natural resources depends on freedom of speech, a dynamic and wide-ranging public debate through multiple independent media channels and an active civil society engaged in natural resource issues..." because of
8800-407: The way through the mountain from Red Mountain to Telluride. Newmont's engineers recognized the old Smuggler-Union mill, also known as the Pandora Mill, which they acquired from Telluride Mines was in a better location than their Treasury Mill on Red Mountain pass. The Treasury mill was difficult and expensive to operate, given its remote location. They decided to rehab the old Pandora mill and close
8900-469: The world's gold, followed by the establishment of large mines such as the Mount Morgan Mine , which ran for nearly a hundred years, Broken Hill ore deposit (one of the largest zinc-lead ore deposits), and the iron ore mines at Iron Knob . After declines in production, another boom in mining occurred in the 1960s. In the early 21st century, Australia remains a major world mineral producer. As
9000-487: The world's prescription medicines have ingredients taken from plants, loss of the world's rainforests could result in a loss of finding more potential life-saving medicines. The depletion of natural resources is caused by 'direct drivers of change' such as mining , petroleum extraction , fishing , and forestry as well as 'indirect drivers of change' such as demography (e.g. population growth), economy, society, politics, and technology. The current practice of agriculture
9100-474: The world, which was increasingly demanding copper for electrical and household goods. Canada's mining industry grew more slowly than did the United States due to limitations in transportation, capital, and U.S. competition; Ontario was the major producer of the early 20th century with nickel, copper, and gold. Meanwhile, Australia experienced the Australian gold rushes and by the 1850s was producing 40% of
9200-557: Was Idarado's best year, and the last year it operated profitably. The two smelters that reduced their ores, one in Leadville, and the other in Corpus Cristi, both closed. Idarado had to send their ores out of the country to be smelted, at an exorbitant cost. The cost of smelting was just one problem. The rich ore body they had struck in 1973 was now exhausted and miners were forced to produce low value ores from farthest edges of
9300-480: Was a perfect candidate for federal assistance. In June of 1943 the US Federal Government, leased the Idarado and paid to have the Treasury Tunnel extended the additional 7000' to come in beneath the old Black Bear workings. Once the Treasury Tunnel was under the Black Bear, miners created a 600' vertical raise to intersect and drain the old workings. A great deal of infrastructure was needed before
9400-628: Was mined in pre-Columbian America; in the Cerillos Mining District in New Mexico , an estimate of "about 15,000 tons of rock had been removed from Mt. Chalchihuitl using stone tools before 1700." In 1727 Louis Denys (Denis) (1675–1741), sieur de La Ronde – brother of Simon-Pierre Denys de Bonaventure and the son-in-law of René Chartier – took command of Fort La Pointe at Chequamegon Bay ; where natives informed him of an island of copper. La Ronde obtained permission from
9500-576: Was primarily extracted from shallow depths, rather than through deep mine shafts. Around the 14th century , the growing use of weapons , armour , stirrups , and horseshoes greatly increased the demand for iron. Medieval knights , for example, were often laden with up to 100 pounds (45 kg) of plate or chain link armour in addition to swords , lances and other weapons. The overwhelming dependency on iron for military purposes spurred iron production and extraction processes. The silver crisis of 1465 occurred when all mines had reached depths at which
9600-406: Was still present near the surface in colonial times. Indigenous peoples used Lake Superior copper from at least 5,000 years ago; copper tools, arrowheads, and other artifacts that were part of an extensive native trade-network have been discovered. In addition, obsidian , flint , and other minerals were mined, worked, and traded. Early French explorers who encountered the sites made no use of
9700-411: Was the removal of water from mining shafts. As miners dug deeper to access new veins, flooding became a very real obstacle. The mining industry became dramatically more efficient and prosperous with the invention of mechanically- and animal-driven pumps. Iron metallurgy in Africa dates back over four thousand years. Gold became an important commodity for Africa during the trans-Saharan gold trade from
9800-403: Was used for a variety of purposes, including removing overburden and rock debris, called hydraulic mining , as well as washing comminuted , or crushed, ores and driving simple machinery. The Romans used hydraulic mining methods on a large scale to prospect for the veins of ore, especially using a now-obsolete form of mining known as hushing . They built numerous aqueducts to supply water to
9900-465: Was used. At other parts of the site, they penetrated the water table and dewatered the mines using several kinds of machines, especially reverse overshot water-wheels . These were used extensively in the copper mines at Rio Tinto in Spain, where one sequence comprised 16 such wheels arranged in pairs, and lifting water about 24 metres (79 ft). They were worked as treadmills with miners standing on
10000-539: Was usually the gold ( placer and then lode ) and then silver that were taken into possession and extracted first. Other metals would often wait for railroads or canals, as coarse gold dust and nuggets do not require smelting and are easy to identify and transport. In the early 20th century, the gold and silver rush to the western United States also stimulated mining for coal as well as base metals such as copper, lead, and iron. Areas in modern Montana, Utah, Arizona, and later Alaska became predominant suppliers of copper to
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