The kinetics and mechanisms of dissolution of the major base metal sulphide minerals, pyrite, chalcopyrite, galena and sphalerite in acidic (chloride) media have been investigated. Minerals were ground in air, then dissolved in air-equilibrated solutions at pH 2.5, while monitoring the redox potential. Solution samples were analysed by ICP-AES and HPLC, and surfaces of residual sulphides analys...

The Jbel Haïmer copper-sulphide mineralisation occurs at 20 km north of Marrakesh in the Variscan Jebilet massif, Morocco. Most ores (up to 3.9 wt% Cu, ?38 ppm Ag, and up 2.9 Au) occur as impregnations NE-SW fault/fracture zones related tectonic breccia. Two independent stages fluid circulation mineral deposition are distinguished. First, Late high temperature-low pressure metamorphism synchron...

In the Buchim porphyry copper deposit, we determined several representative rare mineral phases, comprising metals from gold-palladium group as well those bismuth-selenium (Cu-Bi-Se-Te-As) group. The phases are represented by new in bismuthinite, galenobismutite, krupkaite, friedrichite, emplectite, laitakarite and native bismuth of gold-palladium, including gold palladium with their elemental ...

The Bukit Botol and Ketaya deposits are two examples of volcanic-hosted massive sulphide (VHMS) that occur in the Tasik Chini area, Central Belt Peninsular Malaysia. mineralisation is divided into subzones distinguished by spatial, mineralogical, textural characteristics. primary minerals include pyrite, chalcopyrite, sphalerite, galena, with lesser amounts Sn- Ag-bearing minerals, Au. However,...

Hydrogen sulphide is still a potential hazard in several occupations"2 and especially in sulphate pulp mills (P Jappinen, academic dissertation) and oil refineries. Blood sulphide may be used as an indicator of an excessive human hydrogen sulphide exposure. Fatal hydrogen sulphide concentrations are known.34 Blood sulphide concentrations have been determined before by ion selective electrodes c...