Gold cyanidation is a hydrometallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. Cyanidation is also widely used in the extraction of silver, usually after froth flotation.
Newmont Corporation is an American gold mining company based in Greenwood Village, Colorado. It is the world's largest gold mining corporation. Incorporated in 1921, it owns gold mines in Nevada, Colorado, Ontario, Quebec, Mexico, the Dominican Republic, Australia, Ghana, Argentina, Peru, and Suriname. In addition to gold, Newmont mines copper, silver, zinc and lead.
Gold mining is the extraction of gold by mining.
Tarkwa is a town and is the capital of Tarkwa-Nsuaem Municipal district, a district in the Western Region southwest of South Ghana. Frequently dubbed as the "Golden City" by its indigenous populace, the region is characterized by a rich tapestry of Fante communities, among which include Efuanta, Tamso, Aboso, Akoon, Nzemaline, and Kwabedu.
Galamsey refers to illegal small-scale gold mining in Ghana. The term is derived from the English phrase "gather them and sell". Historically, galamsey referred to traditional small-scale mining practices in Ghana, where local communities would gather and search for gold in rivers and streams. However, over time, the term has taken on a broader meaning, encompassing both legal and artisanal small-scale mining (ASM). In Ghana, those involved in these activities are called galamseyers, and in neighbouring Francophone countries such as Ivory Coast and Burkina Faso, they are often referred to as orpailleurs. Ghana's widespread illegal mining activities have caused extensive destructing to the gold-rich West African country's forests.
Gold Fields Limited is one of the world's largest gold mining firms. Headquartered in Johannesburg, South Africa, the company is listed on both the Johannesburg Stock Exchange (JSE) and the New York Stock Exchange (NYSE). The firm was formed in 1998 with the amalgamation of the gold assets of Gold Fields of South Africa Limited and Gencor Limited. The company traces its roots back to 1887, when Cecil Rhodes founded Gold Fields of South Africa Limited. As of 2019, Gold Fields was the world's eighth-largest producer of gold.
Prestea is a town in the Western Region, in southwest Ghana and about 50 km north of the coast of the Atlantic Ocean. It lies on the west bank of the Ankobra River, about 60 mi (100 km) northwest of Cape coast. The town is part of the Prestea-Huni Valley District. Prestea is the forty-sixth most populous in Ghana, in terms of population, with a population of 35,760 people. A railway line connects Prestea to Tarkwa and beyond to the coastal city of Sekondi-Takoradi.
Wiluna Gold Mine is an active gold mine operated by Wiluna Mining Corporation near the town of Wiluna, 940 kilometres (580 mi) north of Perth in Western Australia's Goldfields region. Wiluna is one of the Goldfield's great mining centres, with historical production plus current resources of more than 310 tonnes.
The Mining industry of Ghana accounts for 5% of the country's GDP and minerals make up 37% of total exports. Gold contributes over 90% of the total mineral exports. Thus, the main focus of Ghana's mining and minerals development industry remains focused on gold. Ghana is Africa's largest gold producer, producing 80.5 t in 2008. Ghana is also a major producer of bauxite, manganese and diamonds. Ghana has 20 large-scale mining companies producing gold, diamonds, bauxite and manganese; over 300 registered small scale mining groups; and 90 mine support service companies. Other mineral commodities produced in the country are natural gas, petroleum, salt, and silver.
The 2000 Baia Mare Cyanide spill was a leak of cyanide near Baia Mare, Romania, into the Someș River by the gold mining company Aurul, a joint-venture of the Australian company Esmeralda Exploration and the Romanian government.
The Iduapriem Gold Mine is an open-pit gold mine situated 10 km south of Tarkwa, in the Western Region of Ghana. The mine is owned by AngloGold Ashanti and consists of the Iduapriem and the Teberebie operation, which were merged in 2000. AngloGold Ashanti originally only owned 85% of the mine but acquired the remaining 15% in September 2007.
Tarkwa-Nsuaem Municipal District, as at 2024, is one of the fifteen districts in Western Region, Ghana. Originally, it was formerly part of the then-larger Wassa West District in 1988, which was created from the former Wassa-Fiase-Mpohor District Council, until the northern part of the district was split off to create Prestea-Huni Valley District on 29 February 2008; thus the remaining part has been renamed as Tarkwa-Nsuaem District, which was later elevated to municipal district assembly status on that same year to become Tarkwa-Nsuaem Municipal District. It has a population of about 218,664 people. The municipality is located in the eastern part of Western Region and has Tarkwa as its capital town.
Aboso is a town near Tarkwa, and is the capital of Wassa West district, a district in the Western Region of Ghana. Aboso is the 78th most populous settlement in Ghana, with a population of 9,945 people. At the Ghana census of 18 March 1984, there were 4,700 inhabitants living in the town.
The Ghana Chamber of Mines (GCM) is the main minerals industry association in Ghana. The Chamber is a voluntary private sector employers association representing companies and organizations engaged in the minerals and mining industry. It was founded in 1928 and has its members accounting for over 90 percent of all of the country's mineral production.
The Omai Gold Mine is located in Guyana on the north coast of South America near the west bank of the Essequibo River in the interior of the country. Access to Omai is by road from the capital of Georgetown on the coast, and from the town of Linden approximately 60 km away. There is an operational airstrip on site which can accommodate aircraft from Georgetown. Gold mining at Omai is known from at least the 1880s, and when it was developed as a large scale mine in 1992 by Cambior, the mine was the largest gold mine in the Guiana Shield and a major source of income and employment in Guyana. During the period from 1992 – 2005, Omai produced 3.7 Moz of gold at an average grade of 1.5 g/t Au from the Fennell and the Wenot open pits.
The Ahafo mine is one of the largest gold mines in the Republic of Ghana and in the world. The mine is located in the center of the country in Brong-Ahafo Region. The mine has estimated reserves of 17 million ounces of gold.
The mining industry of Mali is dominated by gold extraction but also produces diamonds, rocksalt, phosphates, semi precious stones, bauxite, iron ore, and manganese. The importance of mining and production of raw minerals has changed throughout time and has involved many foreign stakeholders, most notably France, the former Soviet Union, and South Africa. Gold, followed by cotton, is the top export item, making it a large contributor to the country’s economy. Mineral extraction in the country is done both via industrial mining and artisanal mining, and both methods of production have had profound impacts on the economy, sociocultural landscape, and environment.
Gold mining in Ghana has a long history, dating back to the 10th century when the region was part of the ancient Ghana Empire. Commercial gold mining began in the early 19th century, with Europeans establishing several mines during the colonial period. The first documented large-scale mining operation in Ghana was at Obuasi, where gold was discovered in 1897. By 1900, Ghana, then known as the Gold Coast, had become a major supplier of gold in the British Empire.
Mining operations
Land disturbances at the Tarkwa mine
