8‐hz Telluric and Magnetotelluric Prospecting

Slankis, J; Telford, W. M.; Becker, Alex

doi:10.1190/1.1440305

Cited by 15 publications

(8 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although the method is we11 known in the field of electrical engineering, the inception of its appIication to the earth's EM problems was first made by DuIaney and Madden ( 1962). Since then, many papers have been published on the use of the method to various geophysical problems (Swift 1967, Madden and Swift 1969, Slankis 1970, Swift 1971, Vozoff 1971, Slankis et al 1972.…”

Section: Introductionmentioning

confidence: 99%

The Topographic Effect in Electromagnetic Fields

Ku¹,

Hsieh²,

Lim³

1973

Can. J. Earth Sci.

View full text Add to dashboard Cite

By making use of the analogy between the network quantities and the electromagnetic fields, a numerical method is employed to investigate the possible topographic effect in the earth's EM fields for several simple models in two dimensional problems. It is found that various topographies may give rise to distortions in the earth's EM fields, and some EM anomalies observed on the ground surface may be simply due to such a topographic effect.Pour etudier les effets possibles de la topographie sur les champs Clectromagnetiques terrestres, pour des modeles simples en deux dimensions, on utilise une rnethode numerique basee sur l'analogie entre les valeurs du reseau et les champs electromagnetiques. On decouvre que diverses topographies peuvent produire des distortions dans les champs Clectromagni.tiques terrestres et que certaines anomalies Clectromagnetiques obsemees a la surface peuvent resulter de tels effets topographiques.[Traduit par le journal]

show abstract

Section: Introductionmentioning

confidence: 99%

The Topographic Effect in Electromagnetic Fields

Ku¹,

Hsieh²,

Lim³

1973

Can. J. Earth Sci.

View full text Add to dashboard Cite

show abstract

“…Coils with cores of high permeability are generally used to detect the magnetic field components. It is only recently that the magnetotelluric method has been used with ELF sources (Slankis et al 1972;Strangway et al 1973). A natural-field ELF method called AFMAG (Audio Frequency Magnetics) has been used in both air-borne and ground-based surveys (Ward 1967).…”

Section: Existing Elf and Vlf Exploration Methodsmentioning

confidence: 98%

The Use of Propagation Data in Earth Resource Studies

Paulson

1974

ELF-VLF Radio Wave Propagation

View full text Add to dashboard Cite

“…After a few attempts to test the applicability of the telluric method in geothermal areas (e.g., Beyer, 1977), it was concluded that the conductivity anomalies did not lend themselves to quantitative interpretation (Goldstein, 1988). Slankis et al (1972) reported 8 Hz telluric measurements made in the vicinity of heavy sulfide deposits. Relative resistivity measurements, obtained by comparison of telluric amplitudes, revealed the location of conductive sulfide bodies, provided that width was greater than depth of burial.…”

Section: Extraction Of the Ip Responsementioning

confidence: 97%

Mapping of induced polarization using natural fields

Gasperikova

Morrison

2001

GEOPHYSICS

View full text Add to dashboard Cite

The observed electromagnetic response of a finite body is caused by induction and polarization currents in the body and by the distortion of the induction currents in the surrounding medium. At a sufficiently low frequency, there is negligible induction and the measured response is that of the body distorting the background currents just as it would distort a direct current (dc). Because this dc response is not inherently frequency dependent, any observed change in response of the body for frequencies low enough to be in this dc limit must result from frequency-dependent conductivity. Profiles of lowfrequency natural electric (telluric) fields have spatial anomalies over finite bodies of fixed conductivity that are independent of frequency and have no associated phase anomaly. If the body is polarizable, the electric field profile over the body becomes frequency dependent and phase shifted with respect to a reference field.The technique was tested on data acquired in a standard continuous profiling magnetotelluric (MT) survey over a strong induced polarization (IP) anomaly previously mapped with a conventional pole-dipole IP survey. The extracted IP response appears in both the apparent resistivity and the normalized electric field profiles.

show abstract

8‐hz Telluric and Magnetotelluric Prospecting

Cited by 15 publications

References 3 publications

The Topographic Effect in Electromagnetic Fields

The Topographic Effect in Electromagnetic Fields

The Use of Propagation Data in Earth Resource Studies

Mapping of induced polarization using natural fields

Contact Info

Product

Resources

About