Definitive superparamagnetic source identification through spatial, temporal, and amplitude analysis of airborne electromagnetic data

Macnae, J 2016, 'Definitive superparamagnetic source identification through spatial, temporal, and amplitude analysis of airborne electromagnetic data', Geophysical Prospecting, vol. 65, no. 4, pp. 1071-1084.


Document type: Journal Article
Collection: Journal Articles

Title Definitive superparamagnetic source identification through spatial, temporal, and amplitude analysis of airborne electromagnetic data
Author(s) Macnae, J
Year 2016
Journal name Geophysical Prospecting
Volume number 65
Issue number 4
Start page 1071
End page 1084
Total pages 14
Publisher Wiley-Blackwell Publishing
Abstract The aim of this paper is to add confidence to existing methods using decay shape analysis to detect superparamagnetic responses in airborne electromagnetic data. While expensive to acquire, vertical spatial gradient measurements of the electromagnetic signals can discriminate near-surface superparamagnetic sources. This research investigated the use of horizontal spatial gradients and amplitude information as further indicators of superparamagnetic. High horizontal gradients were shown both theoretically and in field data to help discriminate superparamagnetic from deep mineral targets. Further, superparamagnetic responses have characteristically small amplitudes inconsistent with realistic mineral exploration targets at shallow depths.
Subject Electrical and Electromagnetic Methods in Geophysics
Keyword(s) Data Processing
Electromagnetics
Interpretation
Magnetics
DOI - identifier 10.1111/1365-2478.12463
Copyright notice © 2016 European Association of Geoscientists and Engineers
ISSN 0016-8025
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