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3D diffraction and mode-converted scattering signatures of base-metal deposits - Bathurst Mining Camp, Canada
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Geological Survey of Canada.
2010 (English)In: Society of Petroleum Engineers - 72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010 - Incorporating SPE EUROPEC 2010, Barcelona, 2010, Vol. 5, 3683-3687 p.Conference paper, Published paper (Refereed)
Abstract [en]

The localized and isolated nature of base-metal deposits and their significantly contrasting elastic properties can generate complex scattering wavefield that may include P-P, P-S, S-P and S-S wave-modes. Multicomponent VSP data confirms presence of multi wave-modes scattered at a deep-seated base-metal deposit in Halfmile Lake, Bathurst Mining Camp, Canada. However, multi wave-modes scattering from a massive sulphide deposit has not yet been recognized on surface seismic data. In this study, we investigate the possible presence of P-P, P-S, S-P, and S-S wave-modes scattered at a base-metal lens at depth of about 1.2 km on 3D surface seismic data acquired with point explosive sources and vertical geophones. We show that the deep lens produces a diagnostic P-P diffraction and could produce mode-converted scattering signals. Results from a target-oriented azimuthal scattering analysis based on 3D prestack migration reveals amplitude anomalies at the location of the base-metal lens for S-P waves and possibly P-S waves. The identification of S-P and P-S wave modes confirms that mode-converted scattering occurring at the deep sulfide lens was recorded on the 3D data. However, the real potential of these complementary wave modes for mineral exploration will only be realistically achieved using shear-wave and multi-component surveys.© 2010, Society of Petroleum Engineers.

Place, publisher, year, edition, pages
Barcelona, 2010. Vol. 5, 3683-3687 p.
Series
72nd European Association of Geoscientists and Engineers Conference and Exhibition 2010 - Incorporating SPE EUROPEC 2010
Keyword [en]
3D data, 3D diffraction, 3D surface, Amplitude anomalies, Elastic properties, Explosive source, Metal deposit, Multicomponents, P waves, Pre-stack migration, S-waves, Scattering analysis, Scattering signals, Sulphide deposits, Surface seismic data, Wave modes, Wavefields, Deposits, Diffraction, Engineering exhibitions, Engineers, Lenses, Metals, Mineral exploration, Optical instruments, Petroleum engineering, Scattering, Seismic response, Seismic waves, Shear waves, Three dimensional, Seismic prospecting
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-165356ISBN: 9781617386671 (print)OAI: oai:DiVA.org:uu-165356DiVA: diva2:473127
Note
References: Bellefleur, G., MÃŒller, C., Snyder, D., Matthews, L., Downhole seismic imaging of a massive sulfide orebody with mode-converted waves, halfmile lake, new brunswick, Canada (2004) Geophysics, 69, pp. 318-329; Malehmir, A., Tryggvason, A., Juhlin, C., Rodriguez-Tablante, J., Weihed, P., Seismic imaging and potential field modeling to delineate structures hosting VHMS deposits in the skellefte ore district, northern Sweden (2006) Tectonophyiscs, 426, pp. 319-334; Malehmir, A., Bellefleur, G., 3D seismic reflection imaging of volcanic-hosted massive sulfide deposits: Insights from re-processing halfmile lake data, new brunswick, Canada (2009) Geophysics, 74, pp. B209-B219; Matthews, L., Base metal exploration: Looking deeper and adding value with seismic data (2002) Canadian Society of Exploration Geophysicists Recorder, pp. 37-43; Milkereit, B., Berrer, E.K., King, A.R., Watts, A.H., Roberts, B., Adam, E., Eaton, D.W., Salisbury, M.H., Development of 3-D seismic exploration technology for deep nickel-copper deposits-A case history from the sudbury basin, Canada (2000) Geophysics, 65, pp. 1890-1899; Salisbury, M.H., Milkereit, B., Ascough, G., Adair, R., Matthews, L., Schmitt, D.R., Mwenifumbo, J., Wu, J., Physical properties and seismic imaging of massive sulfides (2000) Geophysics, 65, pp. 1882-1889Available from: 2012-01-05 Created: 2012-01-05 Last updated: 2012-01-16

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