LITHOPROBE — geoscience probing of inner space leads to new developments for mining exploration

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Mots clés : Exploration;Lithoprobe
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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: Placer mineral deposits may exist in the nearshore and shelf regions off western Canada. These deposits could contain gold, il-menite or zircon as well as sand and gravel aggregate. Two deposit types typical of the British Columbia offshore are: (1) modem and relict gold/titanium beach deposits; and (2) reworked relict titanifer-ous shelf deposits. The preservation of drowned beach heavy mineral concentrations resulted from a rapid relative sea level rise across the shallow shelves approximat...
Publication: CIM Bulletin
Auteur(s): J. Vaughn Barrie
Mots clés: Exploration, Placer mineral deposits, Marine mineral resources, Offshore mineral extraction, Queen Charlotte Islands, Gold deposits.
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
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