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

Azadeh Rezvani, Torleif Dahlin, Per-Ivar Olsson, Gianluca Fiandaca, Paal Ahnfelt

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

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.
Original languageEnglish
Title of host publication21st European Meeting of Environmental and Engineering Geophysics
DOIs
Publication statusPublished - 2015
EventNear Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics - Torino, Italy
Duration: 2015 Sept 62015 Sept 10

Publication series

Name
ISSN (Print)2214-4609

Conference

ConferenceNear Surface Geoscience 2015 - 21st European Meeting of Environmental and Engineering Geophysics
Country/TerritoryItaly
CityTorino
Period2015/09/062015/09/10

Subject classification (UKÄ)

  • Geotechnical Engineering

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