An adit or stulm is a horizontal or nearly horizontal passage to an underground mine. Miners can use adits for access, drainage, ventilation, and extracting minerals at the lowest convenient level. Adits are also used to explore for mineral veins. Although most strongly associated with mining, the term adit is sometimes also used in the context of underground excavation for non-mining purposes; for example, to refer to smaller underground passageways excavated for underground metro systems, to provide pedestrian access to stations, and for access required during construction.
The tin mining industry on Dartmoor, Devon, England, is thought to have originated in pre-Roman times, and continued right through to the 20th century, when the last commercially worked mine closed in November 1930. From the 12th century onwards tin mining was regulated by a stannary parliament which had its own laws.
Eldorado Resources was a Canadian mining company active between 1926 and 1988. The company was originally established by brothers Charles and Gilbert LaBine as a gold mining enterprise in 1926, but transitioned to focus on radium in the 1930s and uranium beginning in the 1940s. The company was nationalized into a Crown corporation in 1943 when the Canadian federal government purchased share control. Eldorado Resources was merged with the Saskatchewan Mining Development Corporation in 1988 and the resulting entity was privatized as Cameco Corporation. The remediation of some mining sites and low-level nuclear waste continue to be overseen by the Government of Canada through Canada Eldor Inc., a subsidiary of the Canada Development Investment Corporation.
The Eldorado Mine is a defunct mine located in Port Radium, Northwest Territories, Canada. The site, which covers 12 hectares, is located next to Echo Bay in the shore of Great Bear Lake.
Rum Jungle is a locality in the Northern Territory of Australia located about 105 kilometres south of Darwin on the East Branch of the Finniss River. It is the site of a uranium deposit, found in 1949, which has been mined.
Poldice mine is a former metalliferous mine located in Poldice Valley in southwest Cornwall, England, United Kingdom. It is situated near the hamlet of Todpool, between the villages of Twelveheads and St Day, three miles (5 km) east of Redruth. Since the early 2000’s the area has been adopted by the local mountain biking community known as the Dice Rollers. The area is now nationally famous as the best location to ride MTB in the south west attracting attention from youtube superstars such as Ben Deakin and his friend Matt Edgie. This is a popular location for mountain bicycling
Radium and radon are important contributors to environmental radioactivity. Radon occurs naturally as a result of decay of radioactive elements in soil and it can accumulate in houses built on areas where such decay occurs. Radon is a major cause of cancer; it is estimated to contribute to ~2% of all cancer related deaths in Europe.
Wheal Jane is a disused tin mine near Baldhu and Chacewater in West Cornwall, England, United Kingdom. The area itself consisted of a large number of mines.
South Crofty is a metalliferous tin and copper mine located in the village of Pool, Cornwall, England. An ancient mine, it has seen production for over 400 years, and extends almost two and a half miles across and 3,000 feet (910 m) down and has mined over 40 lodes. Evidence of mining activity in South Crofty has been dated back to 1592, with full-scale mining beginning in the mid-17th century. The mine went into serious decline after 1985 and eventually closed in 1998. After several changes of ownership, South Crofty is owned by Cornish Metals Inc, which is working to re-open the mine, as of November 2022, having received a permit for dewatering the mine.
Marine Transportation Services (MTS) formerly Northern Transportation Company Limited (NTCL) is a marine transportation company operating primarily in the Mackenzie River watershed of the Northwest Territories and northern Alberta, and the Arctic Ocean using a fleet of diesel tug boats and shallow-draft barges. NTCL filed for bankruptcy in 2016 and its assets were acquired by the Government of the Northwest Territories later that year.
SAG/SDAG Wismut was a uranium mining company in East Germany during the time of the Cold War. It produced a total of 230,400 tonnes of uranium between 1947 and 1990 and made East Germany the fourth largest producer of uranium ore in the world at the time. It was the largest single producer of uranium ore in the entire sphere of control of the USSR. In 1991 after German reunification it was transformed into the Wismut GmbH company, owned by the Federal Republic of Germany, which is now responsible for the restoration and environmental cleanup of the former mining and milling areas. The head office of SDAG Wismut / Wismut GmbH is in Chemnitz-Siegmar.
Wheal Gorland was a metalliferous mine located just to the north-east of the village of St Day, Cornwall, in England, United Kingdom. It was one of the most important Cornish mines of the late 18th and early 19th centuries, both for the quantity of ore it produced and for the wide variety of uncommon secondary copper minerals found there as a result of supergene enrichment. It is the type locality for the minerals chenevixite, clinoclase, cornwallite, kernowite and liroconite.
Canada is the world's second-largest producer of uranium, behind Kazakhstan. In 2009, 20% of the world's primary uranium production came from mines in Canada. 14.5% of the world production came from one mine, McArthur River. Currently, the only producing area in Canada is northern Saskatchewan, although other areas have had active mines in the past.
East Wheal Rose was a metalliferous mine around three-quarters of a mile (1.2 km) south east of the village of St Newlyn East and is around 4 miles (6.4 km) from Newquay on the north Cornwall coast, United Kingdom. The country rock at the mine was killas and its main produce was lead ore (galena), but as is usual when mining this mineral, commercial quantities of silver and zinc were also found and sold.
Wheal Vor was a metalliferous mine about 2 miles (3.2 km) north west of Helston and 1 mile (1.6 km) north of the village of Breage in the west of Cornwall, England, UK. It is considered to be part of the Mount's Bay mining district. Until the mid-19th century the mine was known for its willingness to try out new innovations. Although very rich in copper and tin ores, the mine never lived up to its expectations. During the later part of the 19th century it had several periods of closure, with an attempt to reopen it in the 1960s which was not successful mainly because of bureaucracy. Today the site is part of the Cornwall and West Devon Mining Landscape.
Wheal Busy, sometimes called Great Wheal Busy and in its early years known as Chacewater Mine, was a metalliferous mine halfway between Redruth and Truro in the Gwennap mining area of Cornwall, England. During the 18th century the mine produced enormous amounts of copper ore and was very wealthy, but from the later 19th century onwards was not profitable. Today the site of the mine is part of the Cornwall and West Devon Mining Landscape, a UNESCO World Heritage Site.
East Pool mine, was a metalliferous mine in the Camborne and Redruth mining area, just east of the village of Pool in Cornwall. Worked from the early 18th century until 1945, first for copper and later tin, it was very profitable for much of its life. Today the site has two preserved beam engines and is part of the Cornwall and West Devon Mining Landscape World Heritage Site. It is owned by the National Trust.
Consolidated Mines, also known as Great Consolidated mine, but most commonly called Consols or Great Consols was a metalliferous mine about a mile ESE of the village of St Day, Cornwall, England. Mainly active during the first half of the 19th century, its mining sett was about 600 yards north–south; and 2,700 yards east–west, to the east of Carharrack. Although always much troubled by underground water, the mine was at times highly profitable, and it was the largest single producer of copper ore in Cornwall. Today the mine is part of the Cornwall and West Devon Mining Landscape World Heritage Site.
The world's largest producer of uranium is Kazakhstan, which in 2019 produced 43% of the world's mining output. Canada was the next largest producer with a 13% share, followed by Australia with 12%. Uranium has been mined in every continent except Antarctica.
Uranium mining around Bancroft, Ontario, was conducted at four sites, beginning in the early 1950s and concluding by 1982. Bancroft was one of two major uranium-producing areas in Ontario, and one of seven in Canada, all located along the edge of the Canadian Shield. In the context of mining, the "Bancroft area" includes Haliburton, Hastings, and Renfrew counties, and all areas between Minden and Lake Clear. Activity in the mid-1950s was described by engineer A. S. Bayne in a 1977 report as the "greatest uranium prospecting rush in the world".
