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TitrePerformance of low-fold scalar migration for downhole seismic imaging of massive sulfide ore deposits at Norman West, Sudbury, Canada
AuteurMueller, C; Bellefleur, G; Adam, E; Perron, G; Mah, M; Snyder, D
SourceGeophysics vol. 77, no. 5, 2012 p. W3-W13,
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110338
Documentpublication en série
Mediapapier; en ligne; numérique
SNRC41I/10; 41I/11; 41I/14; 41I/15
Lat/Long OENS-81.6667 -80.7500 46.8333 46.5000
Sujetsinterpretations sismiques; levés sismiques; levés de reflexion sismiques; sulfures; gîtes sulfureux; levés géophysiques; interprétations géophysiques; données sismiques; Complexe de Sudbury Igneous ; géophysique; géologie économique
Illustrationslocation maps; profiles; plots
ProgrammeÉtude des gîtes de sulfures massifs volcaniques, Initiative géoscientifique ciblée (IGC-4)
Résumé(disponible en anglais seulement)
The Downhole Seismic Imaging consortium conducted two consecutive vertical seismic profiling surveys in the Norman West mining camp (Sudbury, Canada) in 1998 and 1999. These were aimed toward imaging a massive sulfide ore deposit situated within the footwall of the Sudbury Igneous Complex (SIC). Three-component seismic data were acquired in four boreholes with variable signal-tonoise ratio and poor polarization quality. Consequently, the images suffered from strong azimuthal ambiguity. A strike filter, passing only reflections originating from within the SIC, was applied during migration to enhance interpretability of the images obtained. Migrated images showed
structures correlating with the known position of an ore deposit located 1800 m away from one borehole (N40). Diffraction coherency migration enhanced the image of the deposit, and suggested strong seismic scattering from within the footwall of the SIC.