Английская Википедия:Gold mining
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Gold mining is the extraction of gold by mining.
Historically, mining gold from alluvial deposits used manual separation processes, such as gold panning. The expansion of gold mining to ores that are not on the surface has led to more complex extraction processes such as pit mining and gold cyanidation. In the 20th and 21st centuries, most volume of mining was done by large corporations. However, the value of gold has led to millions of small, artisanal miners in many parts of the Global South.
Like all mining, human rights and environmental issues are common in the gold mining industry, and can result in environmental conflict. In mines with less regulation, health and safety risks are much higher.Шаблон:TOC limit
History
The exact date that humans first began to mine gold is unknown, but some of the oldest known gold artifacts were found in the Varna Necropolis in Bulgaria. The graves of the necropolis were built between 4700 and 4200 BC, indicating that gold mining could be at least 6,724 years old.[1] During a series of excavations carried out between 1878-1992, several graves were found with more than 6kg of gold.[2] A group of German and Georgian archaeologists claims the Sakdrisi site in southern Georgia, dating to the 3rd or 4th millennium BC, may be the world's oldest known gold mine.[3]
Evidence suggests that Nubia had sporadic access to gold nuggets during the Neolithic and Prehistoric Period. During the Bronze Age, sites in the Eastern Desert became a great source of gold-mining for nomadic Nubians, who used "two-hand-mallets" and "grinding ore extraction." By the Old Kingdom, the oval mallet was introduced for mining. By the Middle Kingdom, stone mortars to process ores and a new gold-washing technique were introduced. During the New Kingdom, Nubian mining expanded under Egyptian occupation with the invention of the grinding mill.[4]
During the Bronze Age, gold objects were also plentiful; especially in Ireland and Spain. Romans used hydraulic mining methods, such as hushing and ground sluicing on a large scale to extract gold from extensive alluvial (loose sediment) deposits, such as those at Las Medulas. Mining was under the control of the state but the mines may have been leased to civilian contractors some time later. The gold served as the primary medium of exchange within the empire, and was an important motive in the Roman conquest of Britain by Claudius in the first century AD; although there is only one known Roman gold mine at Dolaucothi in west Wales. Gold was a prime motivation for the campaign in Dacia when the Romans invaded Transylvania in what is now modern Romania in the second century AD. The legions were led by the emperor Trajan, and their exploits are shown on Trajan's Column in Rome and the several reproductions of the column elsewhere (such as the Victoria and Albert Museum in London).[5] Under the Eastern Roman Empire Emperor Justinian's rule, gold was mined in the Balkans, Anatolia, Armenia, Egypt, and Nubia.[6]
In the area of the Kolar Gold Fields in Bangarpet Taluk, Kolar district of Karnataka state, India; gold was first mined prior to the 2nd and 3rd century AD by digging small pits. Golden objects found in Harappa and Mohenjo-daro have been traced to Kolar through the analysis of impuritiesШаблон:Sndthe impurities include 11% silver concentration, found only in KGF ore.Шаблон:Citation neededThe Champion reef at the Kolar gold fields was mined to a depth of Шаблон:Convert during the Gupta period in the fifth century AD. During the Chola period in the 9th and 10th century AD, the scale of the operation grew.Шаблон:Citation needed The metal continued to be mined by the eleventh century kings of South India, the Vijayanagara Empire from 1336 to 1560, and later by Tipu Sultan, the king of Mysore state and the British. It is estimated that the total gold production in Karnataka to date is 1000 tons.[7]
The mining of the Hungarian deposit (present-day Slovakia) primarily around Kremnica was the largest of the Medieval period in Europe.[8]
During the 19th century, numerous gold rushes in remote regions around the globe caused large migrations of miners, such as the California Gold Rush of 1849, the Victorian Gold Rush, and the Klondike Gold Rush. The discovery of gold in the Witwatersrand led to the Second Boer War and ultimately the founding of South Africa. Gold-bearing reefs in the neighbouring Free State province were found shortly thereafter, driving significant development in the region with the establishment of the Free State goldfields.
The Carlin Trend of Nevada, U.S., was discovered in 1961. Official estimates indicate that total world gold production since the beginning of civilization has been around Шаблон:Convert and total gold production in Nevada is 1.1% of that, ranking Nevada as one of the Earth's primary gold-producing regions.[9][10]
Statistics
World gold production was 3,612 tonnes in 2022.[11] Шаблон:Asof, the world's largest gold producer was China with 368.3 tonnes of gold mined in that year. The second-largest producer of gold was Russia where 331.1 tonnes was mined in the same year, followed by Australia with 327.8 tonnes.[12] In 2023, the annual gold demand of 4,448 tonnes was 5% below that of 2022. The total gold demand in 2023 was the highest at 4,899 tonnes.[13] Шаблон:-
Despite its decreasing content in ores, gold production is increasing. This increase can be achieved through ever larger-scale industrial installations as well as innovations, especially in hydrometallurgy.
Methods
Hard rock mining
Шаблон:Main Hard rock mining extracts gold encased in rock, rather than fragments in loose sediment, and produces most of the world's gold. Sometimes open-pit mining is used, such as at the Fort Knox Mine in central Alaska. Barrick Gold Corporation has one of the largest open-pit gold mines in North America located on its Goldstrike mine property in north eastern Nevada. Other gold mines use underground mining, where the ore is extracted through tunnels or shafts. South Africa has the world's deepest hard rock gold mine up to Шаблон:Convert underground. At such depths, the heat is unbearable for humans, and air conditioning is required for the safety of the workers. The first such mine to receive air conditioning was Robinson Deep, at that time the deepest mine in the world for any mineral.[14]
By-product gold mining
Gold is also produced by mining in which it is not the principal product. Large copper mines, such as the Bingham Canyon mine in Utah, often recover considerable amounts of gold and other metals along with copper. Sand and gravel pits, like those in Denver (Colorado), may recover small amounts of gold in their wash operations. The largest producing gold mine in the world, the Grasberg mine in Papua, Indonesia, is primarily a copper mine.[15]
Niche, recreational, or historical methods
Placer mining
Шаблон:Main Placer mining is a method of extracting gold from alluvial deposits such as sand, gravel, and sediment.[16][17] These are known as placer deposits which are typically found in riverbeds, stream beds, and floodplains.[18] Unlike hard-rock mining, which involves excavating solid rock formations, water or dredging is used to extract the gold.[16]
Sluicing
Using a sluice box to extract gold from placer deposits has long been a very common practice in prospecting and small-scale mining. Sluices work on the principle that heavier particles will sink to the bottom of a stream, while those that are lighter will be carried downstream and expelled.[19][20] A sluice box is essentially a man made channel with riffles set in the bottom. The riffles are designed to create dead zones in the current to allow gold to drop out of suspension.[19][20] The box is placed in the stream to channel water flow. Gold-bearing material is placed at the top of the box. The material is carried by the current through the volt where gold and other dense material settles out behind the riffles. Less dense material flows out of the box as tailings.[19][20]
Larger commercial placer mining operations employ screening plants, or trommels, to remove the larger alluvial materials such as boulders and gravel, before concentrating the remainder in a sluice box or jig plant.[17] After the gold is sorted through trommels, it is then placed through regular sluice boxes for further sorting.[17] These operations typically include diesel powered, earth moving equipment including excavators, bulldozers, wheel loaders, and rock trucks.
Dredging
Шаблон:Main Although this method has largely been replaced by modern methods, some dredging is done by small-scale miners using suction dredges. These are small machines that float on the water and are usually operated by one or two people. A suction dredge consists of a sluice box supported by pontoons, attached to a suction hose which is controlled by a miner working beneath the water. This method is particularly popular in areas where gold is found at river bottoms or submerge deposits.
Suction dredging can have environmental impacts, moreso on aquatic habitats and water quality.[21] Regulations and best practices are often in place to minimize these impacts.[21] State dredging permits in many of the United States gold dredging areas specify a seasonal time period and area closures to avoid conflicts between dredgers and the spawning time of fish populations. Some US states, such as Montana, require an extensive permitting procedure, including permits.
Some large suction dredges [[[:Шаблон:Convert]] & Шаблон:Convert] are used in commercial production throughout the world. Small suction dredges are much more efficient at extracting smaller gold than the old bucket line. This has improved the chances of finding gold. Smaller dredges with Шаблон:Convert suction tubes are used to sample areas behind boulders and along potential pay streaks, until "colour" (gold) appears.
Other larger scale dredging operations take place on exposed river gravel bars at seasonal low water. These operations typically use a land based excavator to feed a gravel screening plant and sluice box floating in a temporary pond. The pond is excavated in the gravel bar and filled from the natural water table.[19] "Pay" gravel is excavated from the front face of the pond and processed through the floating plant, with the gold trapped in the onboard sluice box and tailings stacked behind the plant, steadily filling in the back of the pond as the operation moves forward.[19] This type of gold mining is characterized by its low cost, as each rock is moved only once. It also has low environmental impact, as no stripping of vegetation or overburden is necessary, and all process water is fully recycled. Such operations are typical on New Zealand's South Island and in the Klondike region of Canada.[22]
Rocker box
Also called a cradle, a rocker box uses riffles located in a high-walled box to trap gold in a similar manner to the sluice box. A rocker box uses less water than a sluice box and is well suited for areas where water is limited. A rocking motion provides the water movement needed for the gravity separation of gold in placer material.[19] Rocker boxes gained popularity during the California Gold Rush in the 19th century and remain in use today.[19][23] Although simple and inexpensive, it is not efficient as the previously discussed mining techniques.
Gold ore processing
Cyanide process
The dominant method for refining gold is a cyanide extraction method, or gold cyanidation, introduced in the late 1800s. This a metallurgical technique used to extract gold from lower grade ores by converting gold into a water soluble coordination complex.[24][25] Finely ground rock is treated with a solution of sodium cyanide. The extract is absorbed onto carbon and then removed from the carbon with a solution of caustic soda and cyanide. Gold cyanide is then converted to relatively pure gold through gold parting.[24][25]
There are many environmental hazards associated with this extraction method, largely due to the high toxicity of the cyanide compounds. Furthermore there are potentials for accidental spills or leaks to cause harm to aquatic ecosystems and human health.[26][27] For example, in 2000, the Baia Mare cyanide spill in northern Romania released approximately Шаблон:Convert of waste water contaminated with heavy metal sludge and up to Шаблон:Convert of cyanide into the Tisza River.[28]
Mercury process
Historically, mercury was used extensively in placer gold mining in order to form mercury-gold amalgam with smaller gold particles, and thereby increase the gold recovery rates.[29] The gold is concentrated by boiling away the mercury from the amalgam. This is effective in extracting very small gold particles, but the process is hazardous due to the toxicity of mercury vapour.[29][30] Large-scale use of mercury stopped in the 1960s. However, mercury is still used in artisanal and small-scale gold mining (ASGM).[29][31]
Business
Small operations
While most gold is produced by major corporations, there are an estimated 10 to 15 million small-scale artisanal gold miners worldwide. Around 4.5 million of them are women, and an estimated 600,000 children work in illegal artisanal gold mines. Artisanal miners use rudimentary methods to extract and process gold. Many of these people are mining to escape extreme poverty, unemployment and landlessness.
In Ghana, galamsey miners are estimated to number 20,000 to 50,000.[32] In neighboring francophone countries, such workers are called orpailleurs. In Brazil, Venezuela, Suriname, and French Guiana, workers are called garimpeiros.[33][34][35] These workers are not required to claim responsibility for their social and environmental impacts.[36][37]
Miners risk government persecution, mine shaft collapses, and toxic poisoning from unsafe chemicals used in processing, such as mercury. For example, in Ghana during 2009, the Dompoase mine collapse killed 18 workers. It was the worst mining disaster in Ghanaian history.[32]
Children in these mines suffer extremely harsh working conditions and various hazards such as collapsing tunnels, explosions, and chemical exposure. Children may be especially vulnerable to these hazards and many suffer from serious respiratory conditions, hearing, and vision problems.[38]
Large companies
Gold mining by large multi-national corporations produces about 80% of the gold supply. Most gold is mined in developing nations. Large mining companies play a key role in globalisation of the economy by linking rich and poor companies.[39] Newmont and Barrick Gold are the largest gold mining companies in the world, but there are many smaller corporations in the industry.[40]
Local communities are frequently vulnerable to environmental degradation caused by large mining companies and may lack government protection or industry regulation.[39] For example, thousands of people around Lega Dembi mine are exposed to mercury, arsenic, and other toxins resulting in widespread health problems and birth defects.[41] Vulnerable communities may also lose their land to the mine.[42] Some large companies have attempted to build local legitimacy through corporate responsibility initiatives and local development.[39][42]
Adverse effects and responses
Шаблон:Pollution sidebar Шаблон:Also
Impact
Gold mining can significantly alter the natural environment. Gold mining activities in tropical forests are increasingly causing deforestation along rivers and in remote areas rich in biodiversity.[43][44] Mining has increased rainforest loss up to 70km beyond lease boundaries, causing nearly 11,670 km2 of deforestation between 2005 to 2015.[45] Up to 9% of gold mining occurs outside of these regulated lease boundaries.[45] Other gold mining impacts, particularly in aquatic systems with residual cyanide or mercury (used in the recovery of gold from ore), can be highly toxic to people and wildlife even at relatively low concentrations.[46]
Gold mining produces more waste than mining of other minerals, because it can be mined at a lower grade. Tailings can contain lead, mercury, cadmium, and arsenic. These toxins can pose health risks for local communities.[39] Arsenic is typically found in gold-containing ores, and gold processing may contaminate groundwater or the atmosphere. This pollution may persist for decades.[47]
The discovery of significant gold deposits in a region often sees a flood of resources and development, which lasts as long as the mines are economic. When goldfields begin to decline in production, local economies find themselves destabilised and overly reliant upon an industry that will inevitably abandon the region when gold deposits are sufficiently depleted;[48][49] leaving areas without proper rehabilitation.[49]
Illegal gold mining exacerbates the ecological vulnerability of the remaining forest ultimately leading to permanent forest loss.[50] Gold mining clears native forests for mineral extraction, but also indirectly facilitates access to more land and further clearing. Rainforest recovery rates are the lowest ever recorded for tropical forests, with there being little to no tree regeneration at abandoned mining camps, even after several years.[51]
Despite the existence of several laws that regulate environmental crimes, illegal practices in mining tends to happen because of an absence of enforcement. The rules for gold mining create ambiguities between the types of 'legal' mining; leaving loopholes for those to exploit.[52]
Responses
Human Rights Watch produced a report in 2015 that outlined some of challenges faced globally. The report notes that Шаблон:Quote
Fairtrade and Fairmined dual certification for gold was launched across the United Kingdom on 14 February 2011,[53] a joint scheme between The Fairtrade Foundation and The Association for Responsible Mining. The Fairmined mark ensures that the gold has been extracted in a fair and responsible manner.
A UN investigation reported human rights abuses such as sexual exploitation of women and children, mercury poisoning, and child labor affecting communities where illegal gold production occurs. The reports said global buyers such as Switzerland, through which roughly two-thirds of global trade transits, need to ensure that human rights are respected throughout supply chains.[54]
The "No Dirty Gold" campaign, working with a number of campaigning partners, was established in 2004 and aims "to ensure that gold mining operations respect human rights and the environment" through a call for changes in gold mining techniques and processes.[55][56] The impacts of mining on the environment are long-lasting, and active land management and restoration are needed to ensure recovery.[51] A barrier to the restoration of environments is cost. Limited funding is a major barrier in implementing commitments.[57] Restoration costs vary widely between difference approaches, such as passive and active restoration.[58][59] Additionally, governments have started to promote the formalization of gold mining.[60] This formalization puts the government in a better position to govern the sectors, manage environmental impacts, and direct mining away from ecologically sensitive areas.[60][61]
Peak gold
Шаблон:Update section Peak gold is the date at which the maximum rate of global gold extraction is reached. According to Hubbert peak theory, after the peak, the rate of production declines until it approaches zero. Unlike petroleum, which is destroyed in use, gold can be reused and recycled.
Supply and demand
World gold demand (defined in terms of total consumption excluding central banks) in 2007 was 3,519 tonnes.[62] Gold demand is subdivided into central bank reserve increases, jewellery production, industrial consumption (including dental), and investment (bars, coins, exchange-traded funds, etc.)
The supply of gold is provided by mining, official sales (typically gold by central banks), de-hedging (physical delivery of metal sold months before by mining companies on terminal markets), and old gold scraps. The total world supply of gold in 2007 was 3,497 tonnes.[63] Gold production does not need to make up for gold demand because gold is a reusable resource. Currently, yearly gold mining produces 2% of the existing above-ground gold which is 158,000 tonnes (as of 2006).[64] In 2008, gold mining produced 2,400 tonnes of gold, official gold sales close to 300 tonnes, and dehedging (physical delivery of metal sold months before by mining companies on terminal markets) close to 500 tonnes.[65]
Timing of peak production
World mined gold production has peaked four times since 1900: in 1912, 1940, 1971, and 2001, which each peak being higher than previous peaks. The latest peak was in 2001, when production reached 2,600 metric tons, then declined for several years.[66] Production started to increase again in 2009, spurred by high gold prices, and achieved record new highs each year from 2011 through 2015, when production reached 3,100 tonnes. Early estimates of 2016 gold production indicate that it was flat to 2015 production, at 3,100 tonnes.[67]
In 2009, Barrick CEO Aaron Regent claimed that global production had peaked in 2000.[68] Barrick's production costs have been "trending down" despite this peak, reaching Шаблон:Convert. In 2006, with gold at Шаблон:Convert, Roland Watson claimed that gold production had peaked in 2001 due to falling exploration in the 1990s, when gold prices were low. He predicted that higher prices and new technologies would boost gold production to higher levels in the future.[69]Шаблон:Unreliable source?
In July 2012, Natural Resource Holdings CEO Roy Sebag wrote a report entitled "2012 World Gold Deposit Ranking"[70] claiming that gold production would peak between 2022 and 2025 due to the markedly lower grades and remote locations of the remaining known undeveloped deposits.
Charles Jeannes, the CEO of Goldcorp, the world's largest gold miner by market capitalization, stated in September 2014 that Peak Gold would be reached in either 2014 or 2015.[71] "Whether it is this year or next year, I don't think we will ever see the gold production reach these levels again," he claimed. "There are just not that many new mines being found and developed."
Economics of gold
The gold price compared to other valuable metals consistently holds its value and is less prone to price changes as other metals. Gold production tends to excel when there are turbulent market conditions with investors seeking a different investment opportunity outside the stock, bond or real estate markets.[72] Some of the factors affecting gold prices are:
Central bank gold reserves
Central banks diversify their reserves with gold to protect the value of the dollar during challenging economic times.[73] When banks are forced to print more money to prevent economic turmoil they are simultaneously devaluing the currency. Gold, unlike money, is a finite valuable material which can be used as a hedge against the inflation cause by increasing the money supply.[73] Gold has this inverse relationship with the US dollar which is used as a reserve asset by many central banks thus protecting the central banks reserves when there is a dip in the US dollar or the money supply increases.[73]
Value of the U.S. dollar
As mentioned above the value of the U.S. dollar is normally inversely related to the value of gold, this is because gold is dollar-denominated.[72] When the U.S. dollar is stronger it tends to keep the price of gold lower and controlled and when there is a weaker U.S. dollar the price of gold is likely to increase as well as the demand for it.[74]
See also
- Sibanye Gold
- Gold extraction
- Gold rush
- Gold prospecting
- Ore genesis
- Peak gold
- Quartz reef mining
- Recreational gold mining
- List of gold nuggets by size
Gold mining by country:
- Witwatersrand around Johannesburg, South Africa
- Witwatersrand Basin in South Africa
- Deepest mines on earth are the gold mines in South Africa
- Gold mining in Brazil
- Gold mining in Africa
- Gold mining in Australia
- Gold mining in the United States
- City of Gold in Canada
- Gold mining in China
- Gold mining in India
- Gold mining in Guyana
- Gold mining in Pakistan:
- Welsh gold
- Sukari, Egypt
- Gold mining in Switzerland
- Gold mine Gondo[75]
Gold rushes: Шаблон:Div col
- United States:
- Georgia Gold Rush (beginning 1828)
- California Gold Rush (1848–1855)
- Pike's Peak Gold Rush (1858–1860)
- Holcomb Valley gold rush (1860s)
- British Commonwealth:
- Australian gold rushes (1850s)
- Victorian Gold Rush (1851–1860s)
- Fraser Canyon Gold Rush (late 1850s), Canada
- Witwatersrand Gold Rush (1880s), South Africa
- Klondike Gold Rush (1896–1899), Canada
- Otago Gold Rush (1860s), New Zealand
- Australian gold rushes (1850s)
References
Further reading
- Шаблон:Citation
- Gudde, Erwin G. California Gold Camps: A Geographical and Historical Dictionary of Camps, Towns, and Localities Where Gold Was Found and Mined; Wayside Stations and Trading Centers (Univ of California Press, 1975).
- Hess, Frank L., C. W. Hayes, and W. Lindgren. "Gold mining in the Randsburg quadrangle, California." Contributions to Economic Geology: US Geological Survey Bulletin (1910): 23–47. Online
- Kelley, Robert L. "Forgotten Giant: The Hydraulic Gold Mining Industry In California." Pacific Historical Review 23.4 (1954): 343–356. Online
- Paul, Rodman Wilson, ed. The California Gold Discovery: Sources, Documents, Accounts, and Memoirs Relating to the Discovery of Gold at Sutter's Mill (Talisman Press, 1967), Primary sources.
- Rohe, Randall E. "Hydraulicking in the American West: The development and diffusion of a mining technique." Montana: The Magazine of Western History (1985) 35#2 to: 18–35. Online
- Rohe, Randall. "Origins & Diffusion of Traditional Placer Mining in the West" Material Culture 18#3 (1986), pp.127–166 Online
- White F. Miner with a Heart of Gold: biography of a mineral science and engineering educator. Friesen Press, Victoria. 2020. ISBN 978-1-5255-7765-9 (Hardcover), 978-1-5255-7766-6 (Paperback), 978-1-5255-7767-3 (eBook).
External links
Шаблон:Commons category Шаблон:Wiktionary
Шаблон:Gold rush Шаблон:Authority control
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite book
- ↑ Dan Oancea, A Tale of Gold Шаблон:Webarchive
- ↑ Dan Oancea, Justinian's Gold Mines Шаблон:Webarchive
- ↑ Шаблон:Cite web
- ↑ Шаблон:Citation
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ "Deepest Mine To Be Air Conditioned" Popular Science, October 1934
- ↑ Шаблон:Cite web
- ↑ 16,0 16,1 Шаблон:Cite journal
- ↑ 17,0 17,1 17,2 Шаблон:Citation
- ↑ Шаблон:Citation
- ↑ 19,0 19,1 19,2 19,3 19,4 19,5 19,6 Шаблон:Cite journal
- ↑ 20,0 20,1 20,2 Шаблон:Cite journal
- ↑ 21,0 21,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 24,0 24,1 Шаблон:Cite journal
- ↑ 25,0 25,1 Шаблон:Citation
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Citation
- ↑ 29,0 29,1 29,2 Шаблон:Cite journal
- ↑ Chemicals and Waste Branch UNEP: ASGM: Eliminating the worst practices Шаблон:Webarchive, YouTube, September 2017.
- ↑ Feijoo, M. D. A., Walker, T. R. (2018). Correspondence to the Editor Re: Artisanal and small-scale gold mining impacts in Madre de Dios, Peru: Management and mitigation strategies. Environment International, 111, 133-134. doi:10.1016/j.envint.2017.11.029
- ↑ 32,0 32,1 Шаблон:Cite news
- ↑ Шаблон:Cite news
- ↑ Шаблон:Cite news
- ↑ Шаблон:Cite news
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ International Journal of Engineering and Information Systems (IJEAIS) ISSN: 2643-640X Vol. 4 Issue 10, October - 2020, Pages: 12-16 www.ijeais.org/ijeais 12 Small-Scale Gold Mining Progress in Prospects in Improving Countries Umirzoqov Azamat Abdurashidovich, Bekmuratov Ajiniyaz Omirbek ogli http://ijeais.org/wp-content/uploads/2020/10/IJEAIS201005.pdf Шаблон:Webarchive
- ↑ 39,0 39,1 39,2 39,3 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite book
- ↑ 42,0 42,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 45,0 45,1 Шаблон:Cite journal
- ↑ Environmental and Health Effects Шаблон:Webarchive. Cyanidecode.org. Retrieved on 26 October 2010.
- ↑ Шаблон:Citation
- ↑ Шаблон:Cite book
- ↑ 49,0 49,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 51,0 51,1 Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite news
- ↑ Шаблон:Cite web
- ↑ Earthworks, No Dirty Gold, accessed 30 October 2023
- ↑ Bland, A., The Environmental Disaster That is the Gold Industry, Smithsonian Magazine, published 14 February 2014, accessed 30 October 2023
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ Шаблон:Cite journal
- ↑ 60,0 60,1 Шаблон:Cite journal
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Thomas Chaise, World gold production 2010, 13 May 2010.
- ↑ US Geological Survey, Gold, Mineral commodity summaries, Jan. 2017.
- ↑ Barrick shuts hedge book as world gold supply runs out; Telegraph Media Group, November 11, 2009
- ↑ In Defense of Peak Gold: Evidence Gold Production Peaked in 2001; Seeking Alpha, September 10, 2006
- ↑ 2012 World Gold Deposit Ranking Шаблон:Webarchive; NRH Research, July 26, 2012
- ↑ Goldcorp: We have hit PEAK gold; Mining.com, September 8, 2014
- ↑ 72,0 72,1 Шаблон:Cite web
- ↑ 73,0 73,1 73,2 Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ See German Wikipedia > Goldmine Gondo
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