Transient electromagnetic surveys for the measurement of near-surface electrical anisotropy

Dennis, Zara; Cull, J. P.

doi:10.1016/j.jappgeo.2011.10.014

Cited by 17 publications

(10 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, due to the need for engineering geophysical prospecting, detection of geological information in the shallow layer and the superficial layer of the ground has received a great deal of attention [15,16], this requires the transmitter to have a higher frequency of current. The frequency domain electromagnetic transmitter needs to solve the problems of fast commutation of current, high linearity of commutation, wide frequency transmission (500 Hz~100 KHz) and constant current amplitude.…”

Section: Introductionmentioning

confidence: 99%

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

Wang

Yao

et al. 2019

Electronics

View full text Add to dashboard Cite

In this paper, a novel AC magnetic transmitter current source circuit is proposed for application of frequency domain electromagnetic method (FEM) prospecting. The proposed current source circuit is capable of generating high frequency and high constant amplitude currents, which are key technical problems for FEM. It is suitable for very wide frequencies. The main circuit of the proposed current source consists of a rising-edge enhancing unit, a constant current control unit, and a high voltage clamping unit. Large constant clamping voltage is applied during the rising edge and the falling edge of the alternating square current to obtain a high frequency and high linearity current source. On the current flat stage, the constant current unit provides the energy to the load to ensure the constant amplitude of the output current. Detailed operations of the proposed magnetic current source are given. Simulation and experimental results demonstrate that the proposed circuit achieves short reversal time, the linearity of the rising/falling edge, constant amplitude and low power loss. These are the desired characteristics of the ac square current source probing transmitter for the magnetic FEM applications.

show abstract

Section: Introductionmentioning

confidence: 99%

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

Wang

Yao

et al. 2019

Electronics

View full text Add to dashboard Cite

show abstract

“…Researchers used multiple geological, geophysical means, extracted abnormal information and identified porphyries contact zones with ore-prospecting potential. In respect of prospecting of space contact relation between porphyries-structuresstratums, seismic exploration method and electric method have significant advantages and researchers have achieved good exploration results (Colin et al, 2009;Gao et al, 2010;Jia et al, 2011;Dennis et al, 2012;Mohamed et al, 2013;. It is well known that the seismic exploration method has high resolution with accuracy to meters, and plays a key role in the oil exploration.…”

Section: Introductionmentioning

confidence: 99%

Locating of Concealed Skarn Iron Ore Deposit Based on Multivariate Information Constraints: A Case Study of Beiya Gold Mine in Yunnan Province

Qiao

Wang

Yang

et al. 2017

Chinese J of Geophysics

View full text Add to dashboard Cite

Skarn deposit is one of the main gold‐polymetallic deposits in Beiya, Yunnan, and constrained by its porphyries, structures and stratums, the favorable ore‐prospecting spaces are contact zones between intermediate‐acid rocks and carbonatite. Based on the physical characteristics of rocks, we realized the transition between target geological body and the geophysical field and extracted the useful information. Skarn iron deposits are characterized by low‐medium resistivity in contact zone, low density of porphyries, high susceptibility and high polarizability of the iron ore. Utilizing the geological and geophysical information, we analyzed ore‐controlling factors in different stages, implemented the locating of concealed skarn iron deposits, established a geophysical exploration mode, verified the validity of the study method on the periphery of the ore district and obtained favorable exploration results. We also proposed a locating and predicting method for the concealed skarn iron deposits, which is applicable to Beiya and other similar ore‐forming geological conditions.

show abstract

“…To have a clear understanding of the influence of electrical anisotropy, a lot of studies have been done (Weidelt, 1999;Weiss et al, 2001;Li, 2002;al-Garni and Everett, 2003;Løseth and Ursin, 2007;Li and Dai, 2011;Dennis and Cull, 2012;Wang et al, 2013;Cai et al, 2014). Considering that the electrical anisotropy can potentially have a significant influence on AEM responses, Yin and Fraser (2004) discussed anisotropic effect on frequency-domain airborne EM data; Yin (2013, 2014) developed an algorithm for 3D AEM anisotropic modeling and analyzed the effect of anisotropy on AEM responses.…”

Section: Introductionmentioning

confidence: 99%

3D time-domain airborne EM modeling for an arbitrarily anisotropic earth

Yin

Liu

2016

Journal of Applied Geophysics

View full text Add to dashboard Cite

Transient electromagnetic surveys for the measurement of near-surface electrical anisotropy

Cited by 17 publications

References 14 publications

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

Locating of Concealed Skarn Iron Ore Deposit Based on Multivariate Information Constraints: A Case Study of Beiya Gold Mine in Yunnan Province

3D time-domain airborne EM modeling for an arbitrarily anisotropic earth

Contact Info

Product

Resources

About