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

Abstract
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 development of gold and massive sulphide deposits. As part of the program, the seismic reflection profiling method is being adapted for the mining industry. Three examples demonstrate the subsurface information that can be obtained. In Noranda, the base of the volcanic Blake River group is imaged and reflectivity is tied to geology through well logs; in Matagami, the zone of mineralization is shown to be downdropped along a major fault; in Sudbury, a new structural model is developed, one that shows marked asymmetry at depth and indicates that some ore-bearing units on the margins of the igneous complex may be repeated at depth.
Keywords: Exploration, LITHOPROBE, Seismic reflection techniques.
Full Access to Technical Paper
PDF version for $20.00
Search
Sort By:  Relevance
Showing results 1 - 6
Text
Publication: CIM Bulletin
Author(s): C.F. Hews, P.N. Calder
Keywords: MIROC, Research and development.
Issue: 977
Volume: 87
Year: 1994
Text
Summary: 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
Author(s): R.J. St. Eloi, C.J. Newman, G. Macfarlane
Keywords: Metallurgy, Smelting, Process gas handling.
Issue: 977
Volume: 87
Year: 1994
Text
Summary: 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
Author(s): V. Singh, Hugh G. Miller
Keywords: Exploration, Gamma ray spectroscopy, Image processing, Radio-elements images, Surveys.
Issue: 977
Volume: 87
Year: 1994
Text
Summary: 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
Author(s): J. Vaughn Barrie
Keywords: Exploration, Placer mineral deposits, Marine mineral resources, Offshore mineral extraction, Queen Charlotte Islands, Gold deposits.
Issue: 977
Volume: 87
Year: 1994
Text
Summary: 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
Author(s): W.J. McGaughey, R.G. McCreary, R.P. Young, S.C. Maxwell
Keywords: Geophysics, Rock mechanics, Seismic tomography, Micro-seismic, Stress, Research and development.
Issue: 977
Volume: 87
Year: 1994
Text
Summary: 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
Author(s): C. Hendricks, M. Scoble, F. Boudreault
Keywords: Drilling, Blasthole drilling, Underground mining.
Issue: 977
Volume: 87
Year: 1994
Powered by Coveo Enterprise Search