Unified deterministic inversion of multifrequency electromagnetic measurements using relaxation models

2021 ◽  
pp. 173-208
Author(s):  
Yifu Han ◽  
Siddharth Misra
Keyword(s):  
Electromagnetic Measurements ◽  
Relaxation Models

Electromagnetic measurements on Martian soil analogs: Implications for MARSIS and SHARAD radars in detecting subsoil water

2007 ◽  
Vol 55 (1-2) ◽  
pp. 193-202 ◽  
Author(s):  
Annamaria Cereti ◽  
Giuliano Vannaroni ◽  
Davide Del Vento ◽  
Elena Pettinelli
Keyword(s):  
Subsoil Water ◽  
Martian Soil ◽  
Electromagnetic Measurements

On: “Effect of tropical weathering on electrical and electromagnetic measurements” by G. J. Palacky and K. Kadekaru (GEOPHYSICS, January 1979, p. 69–88).

Geophysics ◽  
1980 ◽  
Vol 45 (7) ◽  
pp. 1205-1208
Author(s):  
B. B. Bhattacharya ◽  
P. K. Hazra
Keyword(s):  
Host Rock ◽  
Vertical Electrical Soundings ◽  
Electromagnetic Measurements ◽  
Tropical Weathering ◽  
Electrical Soundings

In this paper, the authors showed a series of electromagnetic (EM) profiles (Figure 20, p. 86) obtained from the ground follow‐up using a slingram system with a frequency of 1600 Hz and coil separation of 120 m. Measurements along all the profiles (A to E) show considerable in‐phase and quadrature anomaly. The host rock in this case is amphibolite. The vertical electrical soundings over the amphibolite (Figure 16, p. 82) indicate that the weathered amphibolite has mean thickness and resistivity of 8.5 ± 2.1 m and 29.7 ± 6.5 Ω-m, respectively. It would, therefore, be reasonable to assume that the in‐phase and quadrature anomalies have been influenced due to the presence of conducting overburden, and the response of the target in such a situation can be altogether different compared to the anomaly of the target in the presence of an insulating or highly resistive overburden.

Electromagnetic measurements in the vicinity of the KTB drill site. Part II. Magnetotelluric results

1993 ◽  
Vol 37 (2) ◽  
pp. 168-188 ◽  
Author(s):  
Václav Červ ◽  
Josef Pek ◽  
Jana Pěčová ◽  
Oldřich Praus
Keyword(s):  
Electromagnetic Measurements ◽  
Drill Site

scholarly journals Geoelectric and electromagnetic measurements within an organized archaeological framework: the Marzabotto example

1994 ◽  
Vol 37 (5 Sup.) ◽  
Author(s):  
E. Bozzo ◽  
S. Lombardo ◽  
F. Merlanti ◽  
M. Pavan
Keyword(s):  
General Pattern ◽  
Geophysical Prospecting ◽  
Urban Structures ◽  
Water Wells ◽  
Electromagnetic Measurements ◽  
Homogeneous Environment

Geophysical prospecting was Performed in the Etruscan settlement of Marzabotto, near Bologna (Italy), to find shallow anthropic structures within an almost homogeneous environment. This paper describes some results of the geoelectric and electromagnetic VLF methods used. Non-standard geoelectric devices, such as the tripotential, twin-probe and the Offset-Wermer methods, were applied. The set of results was compared to classical dipolar sections. The Offset-Wenner device was useful for detecting vertically striking structures. Conversely, the electromagnetic VLF techniques are not suitable for investigating structures with a negligible contrast of conductivity with the environment. Prospecting data generated a general pattern of anomalies and some were confirmed by excavation samples, showing walIs, floors, water wells and other remains of urban structures.

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