Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/61889
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Type: Journal article
Title: Ore-body imaging by crosswell seismic waveform inversion: A case study from Kambalda, Western Australia
Author: Xu, K.
Greenhalgh, S.
Citation: Journal of Applied Geophysics, 2010; 70(1):38-45
Publisher: Elsevier Science BV
Issue Date: 2010
ISSN: 0926-9851
1879-1859
Statement of
Responsibility: 
Kun Xu, Stewart Greenhalgh
Abstract: Seismic P waveforms from a hardrock crosswell experiment were inverted for the velocity distribution between boreholes. The inversion was carried out by an iterative source estimation scheme in the frequency domain. Six frequencies in the range 900-2000 Hz were employed to yield a tomogram which closely matches the known geology, and clearly discloses the nickel sulphide mineralization. The waveform inversion is superior to traveltime tomography, which was used to obtain the starting model. Pre-processing, to isolate the direct P arrivals, is critical to the success of the method, because noise in the form of tube wave-to-body-wave conversions in the source hole, and body wave-to-tube wave conversions in the receiver hole complicate the seismograms and cannot be satisfactorily accommodated in the wavefield modelling. Such noise also precludes a successful migration. Even though the very fine detailed velocity structure cannot be fully recovered using just the first arrival full waveform, it remains a viable and useful approach. Crown Copyright © 2009.
Keywords: Crosswell
Inversion
Ore body
Direct P waves
Tube wave
Rights: Crown copyright © 2009 Published by Elsevier B.V.
DOI: 10.1016/j.jappgeo.2009.11.001
Published version: http://dx.doi.org/10.1016/j.jappgeo.2009.11.001
Appears in Collections:Aurora harvest 5
Physics publications

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