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Volume 20 Issue 3
Jun 2009
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László Szarka. Early Analogue Modeling Experiments and Related Studies to Today's Problems of Geo-electromagnetic Exploration. Journal of Earth Science, 2009, 20(3): 618-625. doi: 10.1007/s12583-009-0051-y
Citation: László Szarka. Early Analogue Modeling Experiments and Related Studies to Today's Problems of Geo-electromagnetic Exploration. Journal of Earth Science, 2009, 20(3): 618-625. doi: 10.1007/s12583-009-0051-y

Early Analogue Modeling Experiments and Related Studies to Today's Problems of Geo-electromagnetic Exploration

doi: 10.1007/s12583-009-0051-y
Funds:

the Hungarian Scientific Research Fund 61013

the Hungarian Scientific Research Fund 68475

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  • Corresponding author: László Szarka, szarka@ggki.hu
  • Received Date: 01 Dec 2008
  • Accepted Date: 09 Feb 2009
  • As I learned it from extensive geo-electromagnetic analogue modeling experiments, some specific nonconventional interpretation parameters, in certain conditions, give more detailed information about the geometry of subsurface resistivity inhomogeneities than the routinely used parameters. In this article, I show several examples, and I present how these early results influenced our later research. An enhanced geometric sensitivity may be due to special array geometry (as we call it "null array"), or it may be due to a narrow and very special frequency range (i.e., the so-called "keyhole" range). Nonconventional but physically based interpretation parameters (like the Poynting vector) or higher order invariants of resistivity or impedance tensors may also give useful additional information about the shape of subsurface bodies. One should be very careful in their application because a large part of these nontraditional approaches are strongly constrained by measuring errors and geological noise.

     

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    Szalai, S., Novák, A., Szarka, L., 2009. Depth of Investigation and Vertical Resolution of Surface Geoelectric Arrays. Journal of Environmental and Engineering Geophysics, 14: 15–23 doi: 10.2113/JEEG14.1.15
    Szalai, S., Szarka, L., 2008a. On the Classification of Surface Geoelectric Arrays. Geophysical Prospecting, 56: 159–175 doi: 10.1111/j.1365-2478.2007.00673.x
    Szalai, S., Szarka, L., 2008b. Parameter Sensitivity Maps of Surface Geoelectric Arrays. I. Linear Arrays. A cta Geod. Geoph. Hung. , 43(4): 439–447. DOI: 10.1556/Ageod.43.2008.4.5
    Szalai, S., Szarka, L., 2008c. Parameter Sensitivity Maps Surface Geoelectric Arrays. II. Nonlinear and Focused Arrays. Acta Geod. Geoph. Hung. , 43: 439–447. DOI: 10.1556/Ageod.43.2008.4.5
    Szalai, S., Szarka, L., Marquis, G., et al., 2004. Colinear Null Arrays in Geoelectrics: IAGA WG 1.2 on EM Induction in the Earth. Proceedings of the 17th Workshop Hyderabad, India. Paper S. 3-P. 3. Available at http://www.Emindia2004.Org,Mtnet:www.Geophysics.Dias.Ie/Mtnet/
    Szalai, S., Szarka, L., Prácser, E., et al., 2002. Geoelectric Mapping of Near-Surface Karstic Fractures by Using Null-Arrays. Geophysics, 67: 1769–1778 doi: 10.1190/1.1527077
    Szalai, S., Szarka, L., Révi, G., et al., 2005. Geoelectric Investigation of a Multidirectional Fissure System in a Karstic Area. P047 Near Surface 2005, Palermo, 4–7 September, 2005
    Szarka, L., 1987. Geophysical Mapping by Stationary Electric and Magnetic Field Components: A Combination of Potential Gradient Mapping (PM) and Magnetometric Resistivity (MMR) Method. Geophysical Prospecting, 35: 434–444
    Szarka, L., 1991. Detectability of High-Conductivity Plates by the CSAMT Method on Basis of Analogue Modelling Results: An Interesting Analogue Modeling Experience. Acta Geod. Geoph. Mont. Hung. , 26: 273–285
    Szarka, L., 1997a. A Compact Representation of Two-Layered Magnetotelluric Response. Geophysical Prospecting, 45: 763–774 doi: 10.1046/j.1365-2478.1997.470284.x
    Szarka, L., 1997b. Illustration of Some 3-D Magnetotelluric Parameters on a Festive Occasion. Publ. Univ. of Miskolc, Series A Mining, 52: 149–161 http://www.matarka.hu/koz/ISSN_0237-6016/vol_52_fasc_1_1997/ISSN_0237-6016_vol_52_fasc_1_1997_eng_149-161.pdf
    Szarka, L., Ádám, A., Menvielle, M., 2005. Field Test of a Quick-Look Imaging Method Based on Rotational Invariants of the 3-D Magnetotelluric Tensor. Geophysical Prospecting, 53: 325–334 doi: 10.1111/j.1365-2478.2005.00477.x
    Szarka, L., Menvielle M., 1999. A Possibility for an Enhanced 3D Parameter-Sensitivity—The Keyhole Imaging. Geophysical Prospecting, 47: 59–71 doi: 10.1046/j.1365-2478.1999.00117.x
    Szarka, L., Menvielle, M., 1997. Analysis of Rotational Invariants of the Magnetotelluric Impedance Tensor. Geophysical Journal International, 129: 133–142 doi: 10.1111/j.1365-246X.1997.tb00942.x
    Szarka, L., Menvielle, M., Spichak, V. V., 2000. Imaging Properties of Apparent Resistivities Based on Rotational Invariants of the Magnetotelluric Impedance Tensor. Acta Geod. Geoph. Hung. , 35(2): 149–175 http://www.researchgate.net/profile/Viacheslav_Spichak/publication/283268078_IMAGING_PROPERTIES_OF_APPARENT_RESISTIVITIES_BASED_ON_ROTATIONAL_INVARIANTS_OF_THE_MAGNETOTELLURIC_IMPEDANCE_TENSOR/links/562fa12c08ae13ee1870e65a.pdf
    Szarka, L., Nagy, Z., 1992. A Possibility of an Electromagnetic Technique to Locate Oil Reservoir Boundaries on Basis of Analogue Modeling Experiments. Acta Geod. Geoph. Mont. Hung. , 27(1): 131–138 http://www.researchgate.net/publication/308674005_A_possibility_of_an_electromagnetic_technique_to_locate_oil_reservoir_boundaries_on_basis_of_analogue_modeling_experiments
    Szarka, L., Zhang, D., Ádám, A., 2004. How Magnetotellurics Is Able to See through 3D Near-Surface Inhomogeneities? Acta Geod. Geoph. Hung. , 39: 1–14 doi: 10.1556/AGeod.39.2004.1.1
    Varga, M., Novák, A., Szarka, L., 2008. Application of Tensorial Electrical Resistivity Mapping to Archaeological Prospection. Near Surface Geophysics, 6(1): 39–47 doi: 10.3997/1873-0604.2007030
    Zhang, D., Szarka, L., Ádám, A., 2004. 3-Dimensional MT Correlation Sounding Curve Research. Oil Geophysical Prospecting, 39: 4–8 (in Chinese) http://www.freepatentsonline.com/6756592.html
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