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Mining for pyrite at Litlabø had first been established in 1865. Stordø Kisgruber A/S was established in 1907 and maintained mining operations which ended in 1968. A total of about eight million tons of ore was won during the operation of the mine. Under the elevator tower is the main mine shaft which went straight down about 750 meters deep.
The Iberian Pyrite Belt is a vast geographical area with particular geological features that stretches along much of the south of the Iberian Peninsula, from Portugal to Spain. It is about 250 km long and 30–50 km wide, running northwest to southeast from Alcácer do Sal (Portugal) to Sevilla (Spain). [ 1 ]
Mundic once [2] referred to pyrite, [3] but has now adopted the wider meaning of concrete deterioration caused by oxidisation of pyrites within the aggregate (usually originating from mine waste). The action of water and oxygen on pyrite forms sulphate (a salt of sulphuric acid ), thereby depleting the pyrite, causing loss of adhesion and ...
Pyrite oxidation by atmospheric O 2 in the presence of moisture (H 2 O) initially produces ferrous ions (Fe 2+) and sulfuric acid which dissociates into sulfate ions and protons, leading to acid mine drainage (AMD). An example of acid rock drainage caused by pyrite is the 2015 Gold King Mine waste water spill.
Sperrylite on chalcopyrite with magnetite, Oktyabersky Mine, Norilsk. Field of view 2.2 cm. Field of view 2.2 cm. Sperrylite is a platinum arsenide mineral with the chemical formula PtAs 2 and is an opaque metallic tin white mineral which crystallizes in the isometric system with the pyrite group structure.
An example of a mine utilizing this technology is the Pueblo Viejo mine in the Dominican Republic. At Pueblo Viejo, the process is performed by injecting high-purity oxygen into autoclaves operating at 230 degrees C and 40 bar of pressure. The resulting chemical reactions oxides the sulfide minerals the gold is trapped within. [3]
The São Domingos Mine is a deserted open-pit mine in Corte do Pinto, Mértola municipality, Alentejo region, Portugal. This site is one of the volcanogenic massive sulfide ore deposits in the Iberian Pyrite Belt, which extends from the southern Portugal into Spain. It was the first place in Portugal to have electric lighting.
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