Generation of Conductivity-Depth Pseudo-Sections from Coincident Loop and In-Loop TEM Data

P. K. Fullagar

doi:10.1071/EG989043

ISSN: 0812-3985
E-ISSN: 1834-7533

Generation of Conductivity-Depth Pseudo-Sections from Coincident Loop and In-Loop TEM Data
Authors P. K. Fullagar^a
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^a Western Mining Corporation Limited, P.O. Box 57, St. Marys, , S.A., , 5042, Australia, .
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 20, Issue 1-2, Mar 1989, p. 43 - 45
DOI: https://doi.org/10.1071/EG989043
- Published online: 01 Mar 1989

Abstract

A computationally-efficient transformation has been developed to convert coincident loop or in-loop TEM profiles to apparent conductivity versus depth pseudo-sections. The transformation is based on the depth to the maximum physical current induced in a half-space, not on attributes of abstract current filaments. Tests on both synthetic and field data indicate that these pseudo-sections provide a useful qualitative portrayal of conductivity structure, thus facilitating first-pass interpretation of TEM in mapping applications.

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1989-03-01

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References

Fullagar, P. K. (1983), ‘Backus-Gilbert inversion of SIROTEM soundings’, A.S.E.G. Third Biennial Conference, Brisbane (abstract).
Macnae, J. and Lamontagne, Y. (1987), ‘Imaging quasi-layered conductive structures by simple processing of TEM data’, Geophysics, 52, 545-554.
Nabighian, M. (1979), ‘Quasi-static transient response of a conducting half-space — an approximate representation’, Geophysics, 44, 1700-1705.
Nekut, A. G. (1987), ‘Direct inversion of time domain electromagnetic data’, Geophysics, 52, 1432-1435.
Raiche, A.P. and Spies, B. R. (1981), ‘Coincident loop transient electromagnetic master curves for interpretation of two-layer earth’, Geophysics, 46, 53-64.
Raiche, A. P. and Gallagher, R. G. (1985), ‘Apparent resistivity and diffusion velocity’, Geophysics 50 1628-1633.
Weidelt, P. (1982), ‘Response characteristics of coincident loop transient electromagnetic systems’, Geophysics, 47, 1325-1330.

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Article Type: Research Article

Keyword(s): apparent conductivity; interpretation; inversion; mapping; pseudo-section; TEM

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Generation of Conductivity-Depth Pseudo-Sections from Coincident Loop and In-Loop TEM Data

Abstract

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