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Experimental estimation of compressional velocities of a series of Swedish crystalline rocks and ores
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Curtin University.
Curtin University.
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2011 (English)In: Society of Petroleum Engineers - 73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011, Vienna, 2011, Vol. 2, 936-940 p.Conference paper, Published paper (Refereed)
Abstract [en]

More than 50 samples were collected and measured for their physical properties including P- and S-wave velocities at both atmospheric and elevated pressures using 0.5 MHz P- and S-wave transducers in a rock physics lab at Curtin University. The rock samples are geographically from two major mining camps in northern and central parts of Sweden with samples ranging from mineral deposits, volcanic rocks to deformed and metamorphosed rocks, and from a region with unique alkaline and carbonatite rocks in the north-central part of Sweden. A few of the rock samples were also measured using a low-frequency (10-50 Hz) apparatus to provide comparison with the ultrasonic velocity measurements. Using a laser interferometer device, rock samples from a major deformation zone were measured for their elastic anisotropy with preliminary results demonstrating that a major reflection zone observed from the deformation zone could be partially enhanced by anisotropy than purely by acoustic impedance contrast. Results may also indicate that some of the coarse grain massive sulphide deposits, in contrary with what generally thought, show a very little acoustic impedance contrast with their host volcanic rocks. Iron deposits show a large acoustic impedance contrast with their hostrock, making them favorable target of seismic methods.

Place, publisher, year, edition, pages
Vienna, 2011. Vol. 2, 936-940 p.
Series
73rd European Association of Geoscientists and Engineers Conference and Exhibition 2011 - Incorporating SPE EUROPEC 2011
Keyword [en]
Carbonatites, Coarse grains, Compressional, Curtin University, Deformation zone, Elastic anisotropy, Elevated pressure, Laser interferometer, Low frequency, Reflection zones, Rock physics, Rock sample, S-wave velocity, Seismic methods, Sulphide deposits, Acoustic impedance, Acoustic impedance measurement, Anisotropy, Deformation, Deposits, Engineers, Interferometers, Iron deposits, Laser interferometry, Mineral resources, Minerals, Petroleum engineering, Rocks, Shear waves, Ultrasonic velocity measurement, Volcanic rocks, Volcanoes, Crystalline rocks
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-165350ISBN: 9781617829666 (print)OAI: oai:DiVA.org:uu-165350DiVA: diva2:473132
Note
References: Bona, A., Bucataru, I., Slawinski, M.A., Inversion of ray velocity and polarization for elasticity tensor (2008) Journal of Applied Geophysics, 65, pp. 1-5; Lebedev, M., Bona, A., Pevzner, R., Gurevich, B., 3C laboratory ultrasound: A new method for measuring elastic anisotropy of rocks (2010) SEG 2010, pp. 2486-2490. , Expanded abstract; Lund, C.-E., Roberts, R.G., Juhlin, C., Bödvarson, R., Palm, H., The use of land recorded long-range marine airgun data in crustal reflection-refraction investigations (1987) Geophys. J. R. Astr. Soc., 89, pp. 365-370; Malehmir, A., Bellefleur, G., 3D seismic reflection imaging of VHMS deposits, Insights from re-processing of the Halfmile Lake data, New Brunswick, Canada (2009) Geophysics, 74, pp. B209-B219; Mikhaltsevitch, V., Lebedev, M., Gurevich, B., Attenuation and modulus dispersion in rocks at low frequencies (2010) CO2CRC Research Symposium, 1-3, p. 68. , Abstract presented at Melbourne, Australia; 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 (6), pp. 1882-1889Available from: 2012-01-05 Created: 2012-01-05 Last updated: 2012-01-16

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