A feasibility study on the reclamation of coal waste dumps by bacterial leaching

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Mots clés : Coal reclamation;Waste dumps;Bacterial leaching
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Sommaire: A helicopter-borne geophysical survey was flown in 1978 over selected areas on Kyushu Island, Japan. The principal sensors were a moving source electro-magnetic system and a magnetometer. Maps of apparent resistivity were generated from the EM data. Based on the resistivity signature of known deposits within the survey areas, targets were selected for ground follow-up. Drilling of one such target in late 1980 resulted in the discovery of a gold deposit from which full production will begin in...
Publication: CIM Bulletin
Auteur(s): IAN M. JOHNSON, MINORU FUJITA
Mots clés: Mineral exploration, Electromagnetic survey, Drilling, Gold deposits, Geophysics, Hishikari gold deposits.
Numéro: 876
Volume: 78
Année: 1985
Texte
Sommaire: The world's first zinc pressure leaching plant at Cominco's Trail operations started production in 1981. Sullivan zinc concentrate is leached at the rate of 190 tpd in a four-compartment autoclave at elevated temperatures and oxygen pressures to produce a zinc sulphate solution and elemental sulphur. Zinc extraction exceeds 98% and sulphide to elemental sulphur conversion exceeds 95%.
The sulphur is recovered from the discharged slurry in the underflow of a hydrocyclone, and is upgraded as a...
Publication: CIM Bulletin
Auteur(s): M.T. MARTIN, W.A. JANKOLA
Mots clés: Extractive metallurgy, Zinc pressure leaching plant, Zinc, Pressure leaching, Sulphur recovery, Flotation.
Numéro: 876
Volume: 78
Année: 1985
Texte
Sommaire: Zonation patterns are well developed in the mafic meta-volcanic rocks that host epigenetic quartz-carbonate-gold vein mineralization at the Hollinger-Mclntyre deposit. Carbonate alteration assemblages are strongly zoned about mineralization. Proceeding inward from background greenschist fades rocks to alteration envelopes enclosing individual veins, the following assemblages are observed: Assemblage I—quartz-albite-chlorite-epidote-actinolite-(calcite) Assemblage II—quartz-albite-...
Publication: CIM Bulletin
Auteur(s): TED J. SMITH, STEPHEN E. KESLER
Mots clés: Mineral exploration, Fluid inclusion, Geochemistry, Wallrock alteration, Gold mineralization, Zoning patterns, Trace elements, Economic geology
Numéro: 876
Volume: 78
Année: 1985
Texte
Sommaire: A test surface Pulse EM(PEM) survey over a plunging massive sulphide lens, located in the Snow Lake area of Manitoba, has shown that it is possible to detect the body to a depth of 300 metres. Another surface survey in the Athabasca basin of Saskatchewan, clearly outlined a large, basement graphitic zone below 450 metres of sandstone cover. Deep detection of these conductive bodies was achieved by energizing large volumes of ground with a strong transmitted EM field. Such large fields also...
Publication: CIM Bulletin
Auteur(s): J. DUNCAN CRONE
Mots clés: Mineral exploration, Pulse EM survey, Ore deposits, Massive sulphides, Drilling, Geophysics, Boreholes.
Numéro: 876
Volume: 78
Année: 1985
Texte
Sommaire: The Gondor Zn-Ag-Pb-Cu deposit is a stratabound massive sulphide lens occurring within Archean volcanidastic rocks of the Yellowknife Supergroup. The deposit is located in the west-central portion of the Slave Structural Province, approximately 350 km north of Yellowknife. Initial diamond drilling at Gondor has outlined a steeply-dipping, L-shaped, folded, massive sulphide body, which may be traced over a strike length of approximately 800 m, and to a depth of 350 m. True widths of up to 40 m...
Publication: CIM Bulletin
Auteur(s): D.S. BUBAR, J.B. HESLOP
Mots clés: Mineral exploration, Geology, Massive sulphide deposits, Gondor deposit, Slave Province, Drilling, Wallrock alteration, Stratigraphy.
Numéro: 876
Volume: 78
Année: 1985
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