Rapid Acquisition of Audio Frequency Magnetotellurics

Barrett Cameron; Peter Wolfgram

doi:10.1071/ASEG2016ab293

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

ISSN: 2202-0586
E-ISSN:

oa Rapid Acquisition of Audio Frequency Magnetotellurics
Authors Barrett Cameron^a and Peter Wolfgram^b
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^a Rapid Geophysics Pty Ltd, C/o Amberley Business Centre, West Perth, . [email protected] ^b Retiree PO Box 614, Cloverdale, WA, 6985, [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/ASEG2016ab293
- Published online: 01 Dec 2016

Abstract

We illustrate that rapid acquisition of audio magnetotellurics (RAMT) is an alternative methodology to construct the impedance tensor. A solenoid is used as the magnetic sensor and a capacitively coupled, long wire antenna (LWA) as the electrical sensor. Recent improvements in data quality, automated processing flows and apparent resistivity to depth transforms resulted in a cost effective and practical alternative for quickly acquiring audio magnetotelluric 1D soundings. Case studies for groundwater, engineering and mining illustrate how the method may be useful for decision making, and hopefully enable more widespread adoption of low cost resistivity measurements.

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2016-12-01

2026-01-25

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References

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Cameron, B.M., 2002, Rapid Acquisition of Audio Frequency Magnetotellurics: Honours Thesis (GPH 13/02), Curtin University of Technology.
Jones, A.G., 1988, Static shift of magnetotelluric data and its removal in a sedimentary basin environment: Geophysics, 53, 967-978. Kepic, A., 1995, Seismoelectric responses from massive sulphide orebodies: Phd. Thesis, University of British Columbia, 158-160. Schmucker, U., 1973, Regional Induction Studies: A review of methods and results: Physics of the Earth and Planetary Interiors, 7, 365-378
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Tripaldi, S., Siniscalchi, A. and Spitzer, K., 2010, A method to determine the magnetotelluric static shift fom DC resistivity measurements in practice: Geophysics, 75, F23-F32.
Wait, J.R., 1989, Comments on “electric field sensors in electromagnetic sounding” with reply by the authors: IEEE Transactions on Geoscience and Remote Sensing, 27, 789-790.
Wait, J.R., 1989, Further comments on “electric field sensors in electromagnetic sounding” with reply by the authors: IEEE Transactions on Geoscience and Remote Sensing, 27, 791-792.
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/content/journals/10.1071/ASEG2016ab293

Article Type: Research Article

Keyword(s): Audio Frequency; Magnetotellurics; RAMT

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