Case histories in the use of Pulse EM from surface and boreholes as an aid in the detection and definition of deep ore deposits

Cette publication n'est pas offerte dans votre langue; certains de ses renseignements ont été préremplis pour la version française.
Mots clés : Mineral exploration;Pulse EM survey;Ore deposits;Massive sulphides;Drilling;Geophysics
Accés complet à Document technique
Version PDF pour 20,00 $
Recherche
Trier par :  Pertinence
Affichage des résultats 1 - 5
Texte
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: Brogan coal containing mean averages of 6,93% w/w total sulphur (1.1% sulphate sulphur, 1.6% organic sulphur and 4.24% pyritic sulphur) and 16.34% mineral ash was used as the test coal in these studies.
Shake-culture leaching studies on seven size fractions of the coal, ranging in size from 0.045 mm to 1.7 mm, showed that the rate of pyrite leaching was inversely proportional to the particle size. As the use of continuous stirred tank reactors would be uneconomical for the reclamation of...
Publication: CIM Bulletin
Auteur(s): R.G.L McCREADY, MARCOS ZENTILLI
Mots clés: Coal reclamation, Waste dumps, Bacterial leaching, Acid mine drainage.
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
Activé par Coveo Enterprise Search