Solution of large-scale 3D controlled-source electromagnetic modeling problem using efficient iterative solvers

C Qiu, C Yin, Y Liu, X Ren, H Chen, T Yan - Geophysics, 2021 - library.seg.org
With geophysical surveys evolving from traditional 2D to 3D models, the large volume of
data adds challenges to inversion, especially when aiming to resolve complex 3D structures …

1D Cole-Cole inversion of TEM transients influenced by induced polarization

M Seidel, B Tezkan - Journal of Applied Geophysics, 2017 - Elsevier
Abstract Effects of induced polarization (IP) can have an impact on time-domain
electromagnetic measurements (TEM) and may lead to sign reversals in the recorded …

Quantitative estimation of intrinsic induced polarization and superparamagnetic parameters from airborne electromagnetic data

J Macnae - Geophysics, 2016 - library.seg.org
The primary aim of my research is to improve the characterization of induced polarization
(IP) responses in airborne electromagnetic (AEM) survey data. The principal objectives are …

Improvement in TDEM sounding interpretation in presence of induced polarization. A case study in resistive rocks of the Fogo volcano, Cape Verde Islands

M Descloitres, R Guérin, Y Albouy, A Tabbagh… - Journal of Applied …, 2000 - Elsevier
A Time Domain Electromagnetic (TDEM) survey was carried out in and around the caldera
of the Fogo volcano, Cape Verde Islands, to detect the low resistive structures that could be …

Occurrence of sign reversal or negative decay transients in SQUID based TDEM measurement systems–Is it due to ground geology or something else?

R Nagendran, L Bisht - Journal of Applied Geophysics, 2023 - Elsevier
This paper seeks to explain the origin of sign reversal or zero-crossover effect observed at
late decay times in the experimental data involving the application of SQUID in geophysical …

Optimum negative response of a coincident-loop electromagnetic system above a polarizable half-space

HM El-Kaliouby, EA El-Diwany, SA Hussain… - Geophysics, 1997 - library.seg.org
The loop radius of the coincident-loop system above a polarizable half-space has a
significant effect on the magnitude of the negative response and its time of occurrence …

Inversion of induced polarization-affected electrical-source transient electromagnetic data observed in the groundwater survey from eastern Tibet, China

X Wang, J Lu, M Guo, S Zhang, Q Hu, H El-Kaliouby - Geophysics, 2025 - library.seg.org
Recent advancements in the signal-to-noise ratio of transient electromagnetic (TEM) devices
have highlighted the significance of induced polarization (IP) effects in areas containing …

Inversion of induced polarization-affected towed-transient electromagnetic data in a lateritic regolith geology: A case study from western Tanzania

PK Maurya, D Grombacher, J Lind, JW Lane, E Auken - Geophysics, 2022 - library.seg.org
For several decades, induced polarization (IP) effects on transient electromagnetic (TEM)
responses have been observed. These effects can manifest as late-time negative transients …

Explicit observation of tertiary magnetic field in TDEM transients; plausible explanation towards induced polarization effect in geophysical prospecting

R Nagendran - Journal of Applied Geophysics, 2024 - Elsevier
In time domain electromagnetic central loop sounding or coincidence loop measurements
often a sign reversal is observed in the recorded decay transients. These negative decay …

Study on the Coincident-Loop Transient Electromagnetic Method in Seafloor Exploration—Taking Jiaodong Polymetallic Mine as a Model

Y Ma, J Hu, Y Chang, Z Liu - Journal of Earth Science, 2021 - Springer
The transient electromagnetic (TEM) method becomes more urgent than ever for marine
exploration due to abundant resource reserves and the increasing undersea engineering …