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Spectral Time Domain IP - Factors Affecting Data Information Content and Applicability to Geological Characterization

Rezvani, Azadeh; Dahlin, Torleif LU ; Olsson, Per-Ivar LU ; Fiandaca, Gianluca and Ahnfelt, Paal (2015) Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics In 21st European Meeting of Environmental and Engineering Geophysics
Abstract
A DCIP survey with different timing settings, electrode arrays, cable spreads and waveforms (50\% and 100\% duty cycle waveform) were carried out over the Liikavaara deposit in northern Sweden. All the measured data were inverted using AarhusInv. Measured data with 100\% duty cycle waveform, which is much faster than the conventional 50\% duty cycle waveform, present significant improvements in the quality of IP-data. It was also attempted to increase the data quality by separating current and potential cables. Tau and C parameters from time domain IP were compared in different time bases and spreads. These two parameters appear to be sensitive to the duration of current injections in which; decreasing the time base causes diminished... (More)
A DCIP survey with different timing settings, electrode arrays, cable spreads and waveforms (50\% and 100\% duty cycle waveform) were carried out over the Liikavaara deposit in northern Sweden. All the measured data were inverted using AarhusInv. Measured data with 100\% duty cycle waveform, which is much faster than the conventional 50\% duty cycle waveform, present significant improvements in the quality of IP-data. It was also attempted to increase the data quality by separating current and potential cables. Tau and C parameters from time domain IP were compared in different time bases and spreads. These two parameters appear to be sensitive to the duration of current injections in which; decreasing the time base causes diminished anomalies in Tau and partly in C. Although measurement with separated spreads improved the data quality, it did not have any significant effect on these two parameters. Moreover correlation of sulphide content matched well with the inverted models, which confirms the applicability of the DCIP method in mineral exploration. (Less)
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author
organization
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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
21st European Meeting of Environmental and Engineering Geophysics
conference name
Near Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics
external identifiers
  • Scopus:84958093202
ISSN
2214-4609
DOI
10.3997/2214-4609.201413818
language
English
LU publication?
yes
id
942a3ac8-badb-4746-bf4e-50245672732b (old id 7856037)
alternative location
http://earthdoc.eage.org/publication/publicationdetails/?publication=82413
date added to LUP
2015-10-20 14:24:04
date last changed
2016-10-13 04:33:00
@misc{942a3ac8-badb-4746-bf4e-50245672732b,
  abstract     = {A DCIP survey with different timing settings, electrode arrays, cable spreads and waveforms (50\% and 100\% duty cycle waveform) were carried out over the Liikavaara deposit in northern Sweden. All the measured data were inverted using AarhusInv. Measured data with 100\% duty cycle waveform, which is much faster than the conventional 50\% duty cycle waveform, present significant improvements in the quality of IP-data. It was also attempted to increase the data quality by separating current and potential cables. Tau and C parameters from time domain IP were compared in different time bases and spreads. These two parameters appear to be sensitive to the duration of current injections in which; decreasing the time base causes diminished anomalies in Tau and partly in C. Although measurement with separated spreads improved the data quality, it did not have any significant effect on these two parameters. Moreover correlation of sulphide content matched well with the inverted models, which confirms the applicability of the DCIP method in mineral exploration.},
  author       = {Rezvani, Azadeh and Dahlin, Torleif and Olsson, Per-Ivar and Fiandaca, Gianluca and Ahnfelt, Paal},
  issn         = {2214-4609},
  language     = {eng},
  series       = {21st European Meeting of Environmental and Engineering Geophysics},
  title        = {Spectral Time Domain IP - Factors Affecting Data Information Content and Applicability to Geological Characterization},
  url          = {http://dx.doi.org/10.3997/2214-4609.201413818},
  year         = {2015},
}