Characterization of frequency‐dependent magnetic susceptibility in UXO electromagnetic geophysics

Meglich, Todd, Li, Yaoguo, Pasion, Len, Oldenburg, Douglas, Van Dam, Remke L., & Billings, Stephen (2008) Characterization of frequency‐dependent magnetic susceptibility in UXO electromagnetic geophysics. In SEG Technical Program Expanded Abstracts 2008, Society of Exploration Geophysicists, Las Vegas, pp. 1248-1252.

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Soils at many locations that have their origin in volcanic parent material and have undergone extensive weathering often exhibit strong frequency-dependent magnetic susceptibilities. The presence of such susceptibility has a profound effect on electromagnetic induction data acquired in such environments. Their transient electromagnetic response is characterized by a t-1 decay that is strong enough to mask UXO responses. In a field study and associated laboratory work on characterizing the frequency-dependent magnetic susceptibility and its influence on transient electromagnetic data, we collected soil samples on the surface and in soil pits from the Island of Kaho'olawe, Hawaii, and measured their frequency dependent magnetic susceptibilities. We present the details of the field investigation, confirm previous theoretical work with field and laboratory measurements, characterize the susceptibility with a Cole-Cole model, and investigate the response specific to the measured susceptibility.

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ID Code: 80136
Item Type: Conference Paper
Refereed: Yes
DOI: 10.1190/1.3059142
ISSN: 1052-3812
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Society of Exploration Geophysicists
Deposited On: 15 Jan 2015 02:58
Last Modified: 16 Jan 2015 05:47

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