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TitleCharacterization of mineralization in the Sullivan-North Star corridor and enhanced exploration for other mineral deposits in the Purcell Basin, southeastern British Columbia: application of high resolution airborne geophysics
AuthorLowe, C; Brown, D A
SourceExploration and Mining Geology vol. 7, no. 3, 1998 p. 237-252
Alt SeriesGeological Survey of Canada, Contribution Series 1998143
ProvinceBritish Columbia
NTS82F/01; 82F/08; 82F/09; 82F/16; 82G/04; 82G/05; 82G/12; 82G/13; 82J/04; 82J/05; 82K/01; 82K/02; 82K/07; 82K/08
AreaFindlay; St Mary River; Yahk
Lat/Long WENS-117.0000 -115.5000 50.5000 49.0000
Subjectsigneous and metamorphic petrology; metallic minerals; mineralogy; sedimentology; mineral deposits; sedimentary ore deposits; mineralization; conductivity; bedrock geology; e m surveys; sulphide deposits; magnetic anomalies; sedex deposits
Illustrationslocation maps; stratigraphic columns; geological sketch maps; magnetic anomaly maps; graphs; tables
LinksOnline - En ligne
AbstractA multi-sensor (electromagnetics, magnetics, gamma-ray spectrometry, and VLF) geophysical survey was recently conducted in the Purcell Basin of southeastern British Columbia in an area encompassing the world-class Sullivan Sedex deposit. The purpose of the survey was to geophysically characterize the known mineral occurrences and to develop strategies to enhance future mineral exploration in the basin. Follow-up investigations of geology and measurements of rock physical properties helped constrain interpretations of the geophysical data sets. Despite extraction of more than 90% of the ore from the Sullivan deposit, it is clear that the mineralization there, as well as at other Sedex occurrences surveyed, is characterized by high conductivity values, strong bedrock conductors, and elevated magnetic anomaly values. The albite-sericite alteration which accompanies this mineralization yields high potassium and low thorium-potassium ratio values. Associated Moyie gabbro is characterized by low electrical conductivity and radioelement concentrations and by high magnetic anomaly values. The study has also aided exploration for other mineral deposit types including stratabound Cu-Ag, placer gold, vein and disseminated base-metal deposits. In addition, the geophysical data have helped constrain geological interpretations of the basin.