A critique of valuation methods for exploration properties and undeveloped mineral resources

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Mots clés : Valuation;Exploration properties;Mineral resources
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Sommaire: This paper deals with the results of the variation of thermal conductivity of rocks with pressure on a laboratory scale. For this purpose, the authors have added a pressure-supplying unit to the apparatus developed by Mousset-Jones and McPherson (1986), Önder (1995), Ashworth and Ashworth (1979), and Innaurato and Occella (1989) in order to measure the thermal conductivity under pressure. The values obtained from the tests performed by this new apparatus have been stated using a regression...
Publication: CIM Bulletin
Auteur(s): Y.S. Durutürk, A. Demirci, A. Keçeciler
Mots clés: Mine heat, Geothermal gradients, Heat transfer, Thermal conductivity
Numéro: 1061
Volume: 95
Année: 2002
Texte
Sommaire: The 1990s saw enormous changes in the Canadian coal industry and the future promises to be no less turbulent. While the markets served by Canadian coal producers have changed and buying practices continue to evolve, the coal mining, or supply side, has also changed remarkably in response and now provides the basis for an interesting industry story. The dynamic situation in coal mining has led to some surprising outcomes and seemingly contradictory developments. This paper outlines the changes...
Publication: CIM Bulletin
Auteur(s): D.O. Downing
Mots clés: Coal mining, Supply, Technology, Productivity, Resource development
Numéro: 1061
Volume: 95
Année: 2002
Texte
Sommaire: Recognition of the diamond potential of the Wawa subprovince was initially determined from regional data using a kimberlite model. The world’s largest stable Precambrian craton, the Superior Province, is considered to be favourable for the emplacement of diamondiferous kimberlite. The Wawa area is located near the intersection of intra-craton structures visible in the regional magnetic data. The Enigma project is located north of the town of Wawa in northern Ontario. From field evidence and...
Publication: CIM Bulletin
Auteur(s): J. Buckle
Mots clés: Diamonds, Enigma project, Exploration, Kimberlites
Numéro: 1061
Volume: 95
Année: 2002
Texte
Sommaire: This paper summarizes diamond exploration techniques used in glaciated terrain, focussing on indicator mineral and geochemical methods applied to glacial sediments. Understanding the ice flow history, depositional history, and stratigraphy of glacial sediments is essential to successful sampling, interpretation and follow-up of indicator mineral and geochemical anomalies related to kimberlites. Kimberlite indicator minerals survive glacial transport over long distances and the relative...
Publication: CIM Bulletin
Auteur(s): M.B. McClenaghan
Mots clés: Diamonds, Exploration techniques, Geochemical methods, Kimberlites, Till geochemistry, Glaciated terrain
Numéro: 1061
Volume: 95
Année: 2002
Texte
Sommaire: The Freightrain kimberlite is located on the Brodeur Peninsula, Baffin Island, Nunavut. Twin Mining is exploring the pipe and adjacent land (79 claims/655 km2) using a combination of airborne geophysics, soil sampling, diamond drilling, trenching and bulk sample processing. The pipe originally was discovered by Cominco Limited in 1975, re-evaluated in 1993 by Lumina Investment Corporation, when it was staked as the Zulu pipe, and subsequently covered by three claims in 1998 by Helix Resources...
Publication: CIM Bulletin
Auteur(s): B.C. Jago, D. Davis, H. Derbuch
Mots clés: Industrial minerals, Kimberlite, Brodeur Peninsula, Geology, Geological surveying
Numéro: 1061
Volume: 95
Année: 2002
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