Airborne IP: Drybones kimberlite VTEM data Cole-Cole inversion

Domenico Di Massa; Vlad Kaminski; Andrea Viezzoli

doi:10.1071/ASEG2016ab135

25th International Conference and Exhibition – Interpreting the Past, Discovering the Future

ISSN: 2202-0586
E-ISSN:

oa Airborne IP: Drybones kimberlite VTEM data Cole-Cole inversion
Authors Domenico Di Massa^a, Vlad Kaminski^b and Andrea Viezzoli^c
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^a University of Naples Federico II Largo San Marcellino, Naples, , Italy, , 80138, [email protected] ^b Aarhus Geophysics, Aps, Lollansgade 52 Aarhus, , Denmark, , DK-8000, [email protected] ^c Aarhus Geophysics, Aps, Lollansgade 52 Aarhus, , Denmark, , DK-8000, [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2016, Issue 25th International Conference and Exhibition – Interpreting the Past, Discovering the Future, Dec 2016, p. 1 - 4
DOI: https://doi.org/10.1071/ASEG2016ab135
- Published online: 01 Dec 2016

Abstract

A VTEM survey was flown over the Drybones kimberlite in 2005, followed by a ZTEM survey in 2009. These data sets were inverted on multiple previous occasions using various 1D, 2D, 3D and plate modelling algorithms. VTEM data showed AIP effects, manifested as negative voltages and otherwise skewed transients. This created artefacts in conventional inversions of VTEM data, which showed some inconsistencies with ZTEM inversions, as well as with the known geology. In 2015 the VTEM data were transferred to Aarhus Geophysics, reprocessed and reinverted using the modified “AarhusINV” code with Cole-Cole modelling. The results are presented in current abstract, they appear to be more interpretable and provide better data fit, than previous inversion attempts.

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References

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Article Type: Research Article

Keyword(s): Airborne IP; Inversion; Kimberlite; Time Domain EM; VTEM

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