Uncertainty and resolution analysis of 2D and 3D inversion models computed from geophysical electromagnetic data

Z Ren, T Kalscheuer - Surveys in Geophysics, 2020 - Springer
A meaningful solution to an inversion problem should be composed of the preferred
inversion model and its uncertainty and resolution estimates. The model uncertainty …

Detection method for water-bearing structure in tunnel by DC resistivity based on directional indicating variable mesh

L Nie, Z Deng, ZQ Li, T Wang, L Han, Y Li - Tunnelling and Underground …, 2024 - Elsevier
The location and shape detection of water-bearing structures, such as karst caves and faults,
is significant for water inrush early warning during tunnel construction. The direct current …

Deformation of crust and upper mantle in central Tibet caused by the northward subduction and slab tearing of the Indian lithosphere: New evidence based on shear …

C Wu, X Tian, T Xu, X Liang, Y Chen, M Taylor… - Earth and Planetary …, 2019 - Elsevier
Shear-wave splitting provides insight into geodynamic processes such as lithospheric
deformation and upper mantle flow. This study presents shear wave splitting parameters …

custEM: Customizable finite-element simulation of complex controlled-source electromagnetic data

R Rochlitz, N Skibbe, T Günther - Geophysics, 2019 - library.seg.org
We have developed the open-source toolbox custEM (customizable electromagnetic
modeling) for the simulation of complex 3D controlled-source electromagnetic (CSEM) …

Review of 3D electromagnetic modeling and inversion for mineral exploration

B Zhang, K Qu, C Yin, Y Wang, Y Liu, X Ren, Y Su - Geophysics, 2025 - library.seg.org
Many mineral deposits have low resistivity. This property makes the electromagnetic (EM)
method a very useful tool for mineral exploration. In the past few decades, the application of …

Effective 3D-transient electromagnetic inversion using finite-element method with a parallel direct solver

H Cai, M Liu, J Zhou, J Li, X Hu - Geophysics, 2022 - library.seg.org
The correct interpretation of time-domain or transient electromagnetic (TEM) data relies on
effective inversion techniques. Herein, we have developed an effective 3D-TEM inversion …

A finite-element time-domain forward solver for electromagnetic methods with complex-shaped loop sources

J Li, X Lu, CG Farquharson, X Hu - Geophysics, 2018 - pubs.geoscienceworld.org
ABSTRACT A finite-element time-domain (FETD) electromagnetic forward solver for a
complex-shaped transmitting loop is presented. Any complex-shaped source can be viewed …

Effects of full transmitting-current waveforms on transient electromagnetics: Insights from modeling the Albany graphite deposit

S Zeng, X Hu, J Li, CG Farquharson… - …, 2019 - pubs.geoscienceworld.org
In transient electromagnetic (TEM) methods, the full transmitting-current waveform, not just
the abrupt turn-off, can have effects on the measured responses. A 3D finite-element time …

Spectral element method for 3-D controlled-source electromagnetic forward modelling using unstructured hexahedral meshes

M Weiss, T Kalscheuer, Z Ren - Geophysical Journal …, 2023 - academic.oup.com
For forward modelling of realistic 3-D land-based controlled-source electromagnetic (EM)
problems, we develop a parallel spectral element approach, blending the flexibility and …

High-order finite-element forward-modeling algorithm for the 3D borehole-to-surface electromagnetic method using octree meshes

C Qin, H Li, H Li, N Zhao - Geophysics, 2024 - library.seg.org
The borehole-to-surface electromagnetic (BSEM) method complements surface and
airborne electromagnetic (EM) methods. The borehole is typically filled with conductive …