Results 31 to 40 of about 8,700 (211)
Transactions of Nonferrous Metals Society of China, 2008 Abstract Oxidation of arsenopyrite with Acidithiobacillus ferrooxidans was studied. The electrochemical results show that arsenopyrite is firstly oxidized to As 2 S 2 at the potential of 0.2−0.3 V (vs SHE) and As 2 S 2 covers the electrode and retards the process continuously.
Tao JIANG +4 more
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Metals, 2023 The use of thiosulfate to extract gold from refractory ores is promising because of its non-toxicity and high selectivity. Sulfide minerals (i.e., pyrite, arsenopyrite, chalcopyrite), major gold carriers in refractory gold ores, however, hinder gold ...
Takunda Joseph Mhandu +6 more
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HETEROGENEOUS COMPOSITION OF GOLD-SULFIDE ORES FROM THE MAISKOE DEPOSIT, NORTHEAST RUSSIA [PDF]
Минералогия, 2019 The geological-technological mapping of gold-sulfide ores from the Maiskoe deposit (northeast Russia) has revealed significant heterogeneities of important technological characteristics of mineral composition: total Au and Sb contents, amount of major Au-
O.A. Tolkanov
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Ar-40/Ar-39 dating of mesothermal, orogenic mineralization in a low-angle reverse shear zone in the Lower Palaeozoic of the Anglo-Brabant fold belt, Belgium [PDF]
, 2002 A
Boven, A., Dewaele, Stijn, Muchez, Ph.
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Results in EngineeringArsenopyrite is an important gold-bearing sulfide mineral, and pretreatment is essential before gold extraction to maximize gold recovery. Bioleaching, with its advantages of simple operation and environmental friendliness, has received widespread ...
Baojun Yang +8 more
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A geochemical study of the Ashanti gold deposit at Obuasi, Ghana [PDF]
, 1995 The Ashanti gold deposit at Obuasi occurs in the Early Proterozoic Birimian formation. The orebodies consist of gold-sulphides disseminated in metasediments and metavolcanics, and gold-bearing quartz veins. Gold occurs mainly as native gold normally with
Kase, Katsuo +2 more
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Ancient tin production: Slags from the Iron Age Carvalhelhos hillfort (NW Iberian Peninsula) [PDF]
, 2018 Provenance and production of tin in the Ancient World has since long been a major topic of discussion among archaeologists. In Western Europe, where significant tin ore (cassiterite) deposits are known, only a few remains of ancient tin production, such ...
Figueiredo, Elin +5 more
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Gold Ores Related to Shear Zones, West Santa Comba Fervenza Area (Galicia, NW Spain): A Mineralogical Study [PDF]
, 1990 Recent research has discovered high-grade Au ores in NNE-SSW trending shear zones in metamorphic proterozoic and palaeozoic terranes, some 40 km NW of Santiago de Compostela (NW Spain).
Castroviejo Bolibar, Ricardo
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Gold-arsenic sulfide mineralization of the Kayancha area, Gorny Altai
Руды и металлы, 2023 Gold-arsenic sulfide type mineralization has first been revealed for the Gorny Altai region. The mineralized zones associate with lamprophyre dikes and are controlled by steeply dipping faults transecting the Vendian-Cambrian terrigenous-carbonate ...
Kryazhev S. G. +3 more
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Stratabound arsenic and vein antimony mineralisation in Silurian greywackes at Glendinning, south Scotland [PDF]
, 1983 Stratiform and disseminated pyrite-arsenopyrite concentrations are overprinted by fracturecontrolled polymetallic mineralisation including stibnite through at least tens of metres of Silurian sediments at Glendinning, near Langholm.
Gallagher, M.J. +10 more
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