Western Canadian marine placer potential

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Mots clés : Exploration;Placer mineral deposits;Marine mineral resources;Offshore mineral extraction;Queen Charlotte Islands
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Texte
Publication: CIM Bulletin
Auteur(s): C.F. Hews, P.N. Calder
Mots clés: MIROC, Research and development.
Numéro: 977
Volume: 87
Année: 1994
Texte
Sommaire: The Kidd Creek copper smelter has been expanded from its original design of 59 000 tonnes of copper per year to over 120 000 tonnes per year. Modifications to the process gas handling system and acid plant have been made to accommodate this higher production rate and, generally, to optimize the operation.
The gas handling system associated with the continuous smelting process is discussed in terms of boiler accretions and modifications to minimize their impact on operations; design changes to...
Publication: CIM Bulletin
Auteur(s): R.J. St. Eloi, C.J. Newman, G. Macfarlane
Mots clés: Metallurgy, Smelting, Process gas handling.
Numéro: 977
Volume: 87
Année: 1994
Texte
Sommaire: Digital image processing and enhancement techniques have been applied to airborne gamma ray spectrometry data from Sudbury, Ontario. These results have been correlated and compared with the available geological maps to evaluate their usefulness for identifying lithological units. Digital processing allows the correlation of various data sets, and different combinations of images can be tested and viewed as a composite image. Composite images with pseudo-colours provide an opportunity to...
Publication: CIM Bulletin
Auteur(s): V. Singh, Hugh G. Miller
Mots clés: Exploration, Gamma ray spectroscopy, Image processing, Radio-elements images, Surveys.
Numéro: 977
Volume: 87
Année: 1994
Texte
Sommaire: Seismic tomography is a process for obtaining images or maps of seismic velocity or other seismic properties of a rock mass. Seismic velocity images reveal variation in elastic moduli which, in turn, are related to several properties required in the geological or geo-mechanical assessment of a rock mass. Seismic velocity is sensitive to lithology, discontinuities, and in situ stress. Spatial or temporal variation of these properties may be indirectly assessed.
Tomographic measurements are...
Publication: CIM Bulletin
Auteur(s): W.J. McGaughey, R.G. McCreary, R.P. Young, S.C. Maxwell
Mots clés: Geophysics, Rock mechanics, Seismic tomography, Micro-seismic, Stress, Research and development.
Numéro: 977
Volume: 87
Année: 1994
Texte
Sommaire: Drilling accuracy represents an important quality control factor in minimizing dilution. Apart from geology, the factors governing drilling accuracy are largely within the control of the mine. Setup location and alignment, as well as actual drilling accuracy, can all be monitored toward their improved control. Trajectory deviation during drilling, although usually beyond the control of even the most experienced and conscientious driller, can be accounted for (if not fully controlled) by...
Publication: CIM Bulletin
Auteur(s): C. Hendricks, M. Scoble, F. Boudreault
Mots clés: Drilling, Blasthole drilling, Underground mining.
Numéro: 977
Volume: 87
Année: 1994
Texte
Sommaire: As part of LITHOPROBE's multidisdplinary earth science research program to understand the evolution of the North American continent, studies have been undertaken in a number of key areas in Canada. In the Trans-Hudson Orogen of Manitoba and Saskatchewan, LITHOPROBE results require re-evaluation of tectonic models related to its origin. In the Abitibi greenstone belt of Quebec and Ontario, results indicate a more complex evolution for the southern Superior province, one that links with the...
Publication: CIM Bulletin
Auteur(s): R.M. Clowes
Mots clés: Exploration, LITHOPROBE, Seismic reflection techniques.
Numéro: 977
Volume: 87
Année: 1994
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