Quantitative Interpretation of Horizontal‐loop Em Measurements Using a Permeable Sphere Model*

S., S.; Verma, Saurabh

doi:10.1111/j.1365-2478.1982.tb01319.x

Cited by 5 publications

(1 citation statement)

References 22 publications

(36 reference statements)

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“…Conversely, high‐frequency signals respond to shallow features better than low‐frequency signals. For more information on this subject, see Parasnis (1971), Biewinga (1977), Lee (1977), Won (1980), Rai and Verma (1982) and Spies (1989).…”

Section: Introductionmentioning

confidence: 99%

Horizontal‐loop electromagnetic signature of a buried dike, Al Quweira area, southwest Jordan

Batayneh¹

2001

Geophysical Prospecting

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During 1999, horizontal‐loop electromagnetic (HLEM) measurements were made over a buried dike in the Al Quweira area, southwest Jordan, using the APEX MAX MIN III instrument, as part of a mineral exploration project. The objectives of the study were (i) to evaluate the resolution of the HLEM technique in field work in detecting and locating anomalies caused by vein‐like bodies, and (ii) to assess the capability of HLEM surveys for detecting targets in other locations throughout our geophysical survey programme. In‐phase and quadrature anomalies were recorded with 50 m and 100 m coil separations and multiple frequencies across the strike of the buried dike. Data recorded at 43 locations, spaced 10 m apart along the survey line, were interpreted quantitatively. For a 50 m separation, corresponding to shallow depths of investigation, the results do not show any recognizable response from the buried dike. The HLEM data were modelled using a three‐layer structure in order to estimate the thickness of the weathering layer along the survey line. Conversely, data obtained with a 100 m separation, corresponding to moderate depths of investigation, reveal significant anomalies from the buried dike at high frequencies. A phasor or vector diagram was used to calculate the response parameter, depth and dip of the buried dike.

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Section: Introductionmentioning

confidence: 99%

Horizontal‐loop electromagnetic signature of a buried dike, Al Quweira area, southwest Jordan

Batayneh¹

2001

Geophysical Prospecting

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Characterization of UXO-like targets using broadband electromagnetic induction sensors

Huang

Won

2003

IEEE Trans. Geosci. Remote Sensing

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We have inverted broadband electromagnetic induction data over an isolated target to determine its electrical conductivity, magnetic permeability, radius, and depth using a sphere model. Studies using synthetic data of a concentric, broadband, electromagnetic sensor indicate that the technique is dependable and produces fast-converging solutions. The geometrical parameters obtained through this technique are very close to true values, and the electric parameters for noise-free data are correct to within a few percent. When 10% noise is added to the data, the geometric parameters are still well determined, but the electric parameters are poorly resolved, particularly for a sphere that is both conductive and permeable. Tests on the experiment data show that volume-equivalent size and depth to a target can be reasonably estimated for a nonspherical object.

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On the Low-Frequency Electromagnetic Responses of In-Line Metal Detectors to Metal Contaminants

Zhao

Yin

Ktistis

et al. 2014

IEEE Trans. Instrum. Meas.

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Quantitative Interpretation of Horizontal‐loop Em Measurements Using a Permeable Sphere Model*

Cited by 5 publications

References 22 publications

Horizontal‐loop electromagnetic signature of a buried dike, Al Quweira area, southwest Jordan

Horizontal‐loop electromagnetic signature of a buried dike, Al Quweira area, southwest Jordan

Characterization of UXO-like targets using broadband electromagnetic induction sensors

On the Low-Frequency Electromagnetic Responses of In-Line Metal Detectors to Metal Contaminants

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