The property consists of 84 units in I I claims, staked in 1976 by H. Hopkins after finding copper-lead-zinc mineralization (Clendenan and Pentland, 1979). Since 1977, work by International Maggie Mines Ltd. and Placer Developrnent Limited (now Placer Dome Inc.) has included mapping, trenching, 78 drill holes tot:alling 8005 metres, and two short adits with drifts followinf; mineralization (Dru...

Bioaccessible U, Th, Pb and the 238U decay products 214Pb and 210Pb have been determined, using a modified Unified BARGE Method (UBM), in waste solids and soils from an abandoned uranium mine in South West England, UK. Maximum aqua regia extractable concentrations for U, Th and Pb were 16,200, 3.8 and 4750 μg g-1, respectively. 238U had highest activity concentrations near the mine shaft, where...

Widespread closure of deep coal mines in industrialised countries in recent decades has resulted in increased pollution of watercourses by acidic, metal-rich mine drainage following flooding of abandoned mine workings. Schemes for remediation of such polluted mine drainage encourage the precipitation of iron, normally in settlement ponds or constructed wetlands, thereby generating large quantit...

At the Bonfim mine, cyanide processing used to extract gold from abandoned tailings represents an important environmental concern. In order to evaluate cyanide concentrations, twenty samples of sediments of the main streams crossing the mine site, and ten samples of the five mainly tailings were analyzed for total cyanide. Cyanide was found in two samples of tailings (0.83 and 1.44mg/Kg of tota...

Treatment of polluting discharges from abandoned mines is producing large quantities of ochre (mainly iron (III) oxides) for which no major end-use has yet been identified. At the same time, phosphorus pollution is a serious threat to the water environment in industrialised countries, causing eutrophication, algal blooms, fish kills and loss of water resources. Newcastle and Edinburgh Universit...

Jarosite, KFe(3)(SO(4))(2)(OH)(6), is a secondary iron sulphate often found in acid mine drainage (AMD) environments, particularly in mining wastes from polymetallic sulphide ore deposits. Despite the negative environmental connotation usually ascribed to secondary sulphate minerals due to the release of hazardous elements to aquifers and soils, jarosite acts as an efficient remover and immobil...

Abstract Under the carbon neutrality goal, coal enterprises must seek breakthroughs from abandoned mines, develop new resources in era, turn problems into countermeasures, and participate emissions market, for contributing to accomplishment of national strategic goal neutrality. To this end, we investigated relevant policies regulations clarify boundaries disclosed by information enterprises, u...

Greenhouse gas (GHG) emissions related to human activities have significantly caused climate change since the Industrial Revolution. China aims achieve its carbon emission peak before 2030 and neutrality 2060. Accordingly, this paper reviews discusses technical strategies “dual carbon” targets in China’s metal mines. First, global intensities from mining industries are analyzed. The status then...