Results 21 to 30 of about 2,742 (208)

Detecting a salt dome overhang with magnetotellurics: 3D inversion methodology and synthetic model studies [PDF]

, 2012
Detecting a salt dome overhang is known to be problematic by seismic methods alone. We used magnetotellurics (MT) as a complementary method to seismics to investigate the detectability of a salt dome overhang.
Anna Avdeeva, Dmitry Avdeev, Marion Jegen, Tikhonov A. N.   +3 more
core   +1 more source

Magnetotelluric inversion strategies [PDF]

ASEG Extended Abstracts, 2019
Regional scale geophysical data is widely and publicly available in many countries. Traditionally, these data include transects that span many hundreds of line kilometres.
Ralf Schaa, Brett Harris, Andrew Pethick
openaire   +1 more source

The pre-Cainozoic basement delineation by magnetotelluric methods in the western part of the Liptovská kotlina Depression (Western Carpathians, Slovakia)

Geologica Carpathica, 2017
The geology and hydrogeology of the Liptovská Kotlina Depression were studied by means of new geophysical methods. Controlled source audio-frequency magnetotellurics enabled us to delineate the relief of the pre-Cainozoic basement in the western part of ...
Fendek Marián, Grand Tomáš, Daniel Slavomír, Blanárová Veronika, Kultan Vincent, Bielik Miroslav   +5 more
doaj   +1 more source

The Relationship Between Kimberlitic Magmatism and Electrical Conductivity Anomalies in the Mantle

Geophysical Research Letters, 2022
Kimberlites are igneous rocks whose formation remains enigmatic due to their severely altered nature, highly variable compositions and rapid ascent through the lithosphere.
Sinan Özaydın, Kate Selway
doaj   +1 more source

A note on the topographic distortion of magnetotelluric impedance

Annals of Geophysics, 2002
Magnetotelluric surveys are prone to interpretation errors in the presence of rough topography, which may need to be compensated for. In the present work we assume that the surface of the Earth is simulated by a single-valued, twice differentiable ...
F. Vallianatos
doaj   +1 more source

Effect of Displacement Current on the Finite-Difference Modeling of Natural Source Electromagnetic Diffusion

Applied Sciences, 2020
For electromagnetic (EM) modeling based on the electric-field formulation at low frequencies, the quasi-static approximation (i.e., only the conduction current is considered and the displacement current is ignored) is commonly applied, and a small ...
Yahui Xue, Jianxin Liu, Rong Liu, Zhuo Liu, Rongwen Guo, Chuanghua Cao   +5 more
doaj   +1 more source

Imaging the Whole‐Lithosphere Architecture of a Mineral System—Geophysical Signatures of the Sources and Pathways of Ore‐Forming Fluids

Geochemistry, Geophysics, Geosystems, 2022
Mineral systems can be thought of as a combination of several critical elements, including the whole‐lithosphere architecture, favorable geodynamic/tectonic events, and fertility.
Matthew J. Comeau, Michael Becken, Alexey V. Kuvshinov   +2 more
doaj   +1 more source

A new petrological and geophysical investigation of the present-day plumbing system of Mount Vesuvius [PDF]

, 2010
Article in PressInternational audienceA model of the electrical resistivity of Mt. Vesuvius has been elaborated to investigate the present structure of the volcanic edifice. The model is based on electrical conductivity measurements in the laboratory, on
Gaillard, Fabrice, Hautot, Sophie, Pichavant, Michel, Pommier, Anne, Scaillet, Bruno, Tarits, Pascal   +5 more
core   +3 more sources

Combined Application of Wide-Field Electromagnetic Method and Flow Field Fitting Method for High-Resolution Exploration: A Case Study of the Anjialing No. 1 Coal Mine

Engineering, 2018
The Anjialing No. 1 Coal Mine in Shanxi Province, China, contains a complicated old goaf and an unknown water distribution that hold high potential for serious water hazards.
Jishan He
doaj   +1 more source

Theoretical analysis and application of the telluric electric field frequency selection method for shallow groundwater exploration

Frontiers in Earth Science
The telluric electric field frequency selection method (TEFSM) measures horizontal electric field components at discrete frequencies of naturally occurring electromagnetic (EM) fields.
Danqi Wang, Tianchun Yang, AbdulGaniyu Isah, Qin Qin, Maoyue Zhu   +4 more
doaj   +1 more source