Application of Surface-Wave Analysis for Mineral Exploration: A Case Study from Central Sweden

M Papadopoulou, F Da Col, LV Socco… - 2nd Conference on …, 2018 - earthdoc.org
M Papadopoulou, F Da Col, LV Socco, E Bäckström, M Schön, P Marsden, A Malehmir
2nd Conference on Geophysics for Mineral Exploration and Mining, 2018earthdoc.org
Near-surface velocity models are important for deep imaging of mineral deposits with
seismic exploration. The near-surface can be quite complex from loose, highly
heterogeneous materials to stiff, fractured rocks. Surface-wave analysis can be an effective
method to image the shallow subsurface of such challenging environments. Here, we
propose a workflow that includes several processing and inversion steps. Initially, for the
optimization of the processing parameters, we assess the presence of sharp lateral …
Summary
Near-surface velocity models are important for deep imaging of mineral deposits with seismic exploration. The near-surface can be quite complex from loose, highly heterogeneous materials to stiff, fractured rocks. Surface-wave analysis can be an effective method to image the shallow subsurface of such challenging environments. Here, we propose a workflow that includes several processing and inversion steps. Initially, for the optimization of the processing parameters, we assess the presence of sharp lateral variations with a method based on the measured energy of Rayleigh waves. Then, using a moving window of receivers, we extract Rayleigh-wave dispersion curves along the acquisition line as the maxima of the f-k spectrum. Finally, the dispersion curves are inverted using a laterally constrained inversion scheme. The proposed methodology has been tested on legacy data from a mining field.
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