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Mine tailings are usually produced from the mill in slurry form, which is a mixture of fine mineral particles and water. [2] Tailings are likely to be dangerous sources of toxic chemicals such as heavy metals, sulfides, and radioactive content. These chemicals are especially dangerous when stored in water in ponds behind tailings dams.
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. [86] Arsenic is typically found in gold-containing ores, and gold processing may contaminate groundwater or the atmosphere.
Peko Mine was located in 1934 by Joe Zaczinski and Bill Bohning. The deposit is named after Joe's dog who was named Peko. They commenced a small gold mining operations before selling their lease to Schmidt in 1934. There was no activity during World War II. [1] In 1947 a company Peko Gold Mines No Liability was formed, managed by Mr W MacDonald ...
Drawbacks of leaching include its lower efficiency and the often significant quantities of waste effluent and tailings produced, which are usually either highly acidic or alkali as well as toxic (e.g. bauxite tailings). There are four types of leaching: [not verified in body] Cyanide leaching (e.g. gold ore) Ammonia leaching (e.g. crushed ore)
Meanwhile, Constantine H. Arundel and Frances E.R. Woolaston, on finding surface traces of gold ore, staked the Bulldog, the Sunnyside, the Copperfield, the Iron Duke, the Horsefly, the Exchange Fraction, and the Nickel Plate. The subsequent gold rush led to registered claims covering almost the whole mountain by the end of 1898. The mountain ...
The wastes from wet separation are typically sand and silt size and are called "tailings." Milling produces large chat waste piles and flat areas with tailings deposited in impoundments. Tailings generally contain higher concentrations of heavy metals and therefore present a higher risk to human health and the environment through direct contact ...
The Red Dog mine is a large zinc and lead mine in a remote region of Alaska, about 80 miles (130 km) north of Kotzebue, which is operated by the Canadian mining company Teck Resources on land owned by the NANA Regional Corporation.
The mine consists of a gravity processing plant, tailings dam, offices, access roads, power lines and a number of open cut pits. These open cuts were the result of previous mining operations and most run north-east with one having a dog-leg to the north. At its deepest point, the Alisons open cut is around 30 metres below the surface. [2]