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Title	Area selection for diamond exploration using deep-probing electromagnetic surveying
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Author	Jones, A G; Craven, J A
Source	8th International Kimberlite Conference: extended abstract; 2003, 4 pages
Links	Online - En ligne
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Year	2003
Alt Series	Geological Survey of Canada, Contribution Series 2004044
Meeting	8th International Kimberlite Conference; Victoria, BC; CA; June 22-27, 2003
Document	book
Lang.	English
Media	CD-ROM
File format	pdf
Subjects	economic geology; geophysics; mineralogy; diamond; kimberlites; magnetic interpretations; magnetic anomalies; magnetic surveys; magnetic surveys, airborne; magnetotelluric field; magnetotelluric interpretations; magnetotelluric surveys; magnetotelluric data; lithosphere; conductivity
Illustrations	graphs; schematic diagrams
Program	Lithoprobe
Program	Indian and Northern Affairs Canada, Funding Program
Released	2003 01 01
Abstract	(unpublished) Previously proposed methods of area selection for diamond-prospective regions have predominantly relied on till geochemistry, airborne geophysics, and/or an appraisal of tectonic setting. Herein we suggest that a novel, deep-probing geophysical technique-electromagnetic studies using the natural-source magnetotelluric (MT) method-can contribute to such an activity. Essentially, diamondiferous regions must have (1) old lithosphere, (2) thick lithosphere, and (3) lithosphere that contains high concentrations of carbon. Deep-probing MT studies are able to address all three of these. The second and the third of these can be accomplished independently using MT, but for the first the geometries produced from modelling the MT observations must be interpreted with appropriate interaction with geologists, geochemists and other geophysicists. Examples are given from the Slave and Superior cratons in North America, with a brief mention of an area of the Rae craton, and general speculations about possible diamondiferous regions.
GEOSCAN ID	215525