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3D diffraction signature of VHMS deposits
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Geological Survey of Canada.
2009 (English)In: Society of Petroleum Engineers - 71st European Association of Geoscientists and Engineers Conference and Exhibition 2009, Amsterdam, 2009, Vol. 4, 2287-2291 p.Conference paper (Refereed)
Abstract [en]

Re-processing of 3D seismic reflection data from the Halfmile Lake area, New Brunswick, Canada has been carried out over a grid of 3 by 6 km with the aim of improving the seismic signatures of a 12 million ton volcanic-hosted massive sulfide (VHMS) deposit located at depth of about 1200 m, known as the Deep zone. We chose a sequence of prestack DMO and poststack migration processing algorithm in order to preserve the possible diffraction signature of the Deep zone. The DMO-stack is characterized by a large and high-amplitude asymmetric diffraction signature originating from the Deep zone. The asymmetry of the diffraction hyperbola relative to the location of the Deep zone is interpreted as a shape effect from the Deep zone, with the strongest amplitudes along the diffraction hyperbola found north-northwest of the apex, indicating that the Deep VHMS zone dips in a similar direction. This diagnostic diffraction signature could not be preserved with the prestack migration approach previously implemented for the processing of the Halfmile Lake data.

Place, publisher, year, edition, pages
Amsterdam, 2009. Vol. 4, 2287-2291 p.
, 71st European Association of Geoscientists and Engineers Conference and Exhibition 2009
Keyword [en]
3D diffraction, 3D seismic, Deep zone, Lake areas, Post-stack migration, Pre-stack migration, Prestack, Processing algorithms, Seismic signatures, Shape effect, Volcanic-hosted massive sulfides, Deposits, Engineering exhibitions, Petroleum industry, Seismology, Three dimensional, Diffraction
National Category
URN: urn:nbn:se:uu:diva-165358ISBN: 9781615672363 (ISBN)OAI: oai:DiVA.org:uu-165358DiVA: diva2:473092
References: Adam, E., Perron, G., Arnold, G., Matthews, L., Milkeriet, B., 3D seismic imaging for VMS deposit exploration, Matagami, Quebec (2003) Hardrock seismic exploration, , Eaton, D.W, Milkereit, B. Salisbury, M.H, Eds, SEG; Bohlen, T., MÃŒller, C., Milkereit, B., Elastic wave scattering from massive sulfide orebodies: On the role of composition and shape (2003) Hardrock seismic exploration, , Eaton, D.W, B. Milkereit, M. H. Salisbury, Eds, SEG; Malehmir, A., Bellefleur, G., 3D seismic reflection imaging of VHMS deposits: Part I, Insights from re-processing of the Halfmile Lake data, New Brunswick, Canada (2009) Geophysics, , Submitted to; Matthews, L., (2002) Base metal exploration: Looking deeper and adding value with seismic data, pp. 37-43. , Canadian Society of Exploration Geophysicists Recorder; 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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