geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Integral equations electromagnetic modeling of 3-D bodies in a layered Earth


, : Integral equations electromagnetic modeling of 3-D bodies in a layered Earth. SEG Abstracts 1981(1): 25-26

With a few exceptions concerning bodies beneath an overburden layer, numerical simulations of the electromagnetic responses of 3-D buried structures have been confined to inhomogeneities in uniform half-space hosts. The importance of overburden layers in determining EM signatures over potential ore deposits has been recognized by mining geophysicists for years. In addition, large scale resistivity structures such as valley sediments or magma chambers, or importance in crust-mantle or geothermal investigations, reside in a regional resistivity layering determined by the physiochemical conditions of the particular tectonic environment. To illuminate special characteristics of EM scattering associated with bodies in layered earths, we have generalized an existing integral equations algorithm previously used to model inhomogeneities in half-spaces. In the integral equations approach, a 3-D inhomogeneity is replaced by an equivalent scattering current defined in terms of the geometry and resistivity values of the body and its layered host. The 3-D body is discretized into rectangularly prismatic cells over each of which the vector scattering current is approximated by a constant. The elements of the impedance matrix, which is inverted to obtain the scattering current in each cell, are constructed from tensor Green's functions specifying the electric field at r due to a current dipole at r' within a given layered earth. From the resulting scattering currents, scattered electric and magnetic fields at the surface may be computed, again using the appropriate layered earth Green's functions.

US$29.90


Other references

Annevelink E., 1992: Operational planning in horticulture optimal space allocation in pot plant nurseries using heuristic techniques. At IMAG [Institute of Agricultural Engineering], in Wageningen [The Netherlands], a Decision Support System (DSS) for glasshouse nurseries has been developed, called the IMAG Production Planning system (IPP). This system focuses first on a tactica...

D.S.ta, E.; Bertoli, G.; D.S.ta, D.; Covelli, E.; Filipo, R., 2011: New development in intraoperative video monitoring of facial nerve: a pilot study. The present study proposes an evolution of an intraoperative video-based facial nerve monitoring system for otologic and otoneurosurgical procedures in comparison with classical electromyographic (EMG) monitoring method. Single-subject design stud...

Takahashi H.; Saito H., 1982: Mechanism of plasmid pbr 322 transduction mediated by cytosine substituting t 4 bacterio phage. A cytosine-substitution type mutant of phage T4 (T4dC phage) mediates the transfer of plasmid pBR322. The transduction frequency was around 10-2 per singly infected [Escherichia coli] cell at low multiplicity of infection. The transductants contai...

Eckerle B.T.; Edgerton L.A.; Jacob A.L.; Newton G.R., 1992: Estrogen induced delay of farrowing in swine. Eighty-four sows and gilts were assigned to 4 treatment groups to assess the effects of estrogen upon normal and prostaglandin-induced farrowing. Sows in Group 1 were injected with saline and corn oil vehicles at 800 hours on Day 112 of gestation...

Glaub Ingrid, 1999: Paleobathymetric reconstructions and fossil microborings. Ichnotaxonomic and paleoecological studies on Jurassic samples resulted in the identification of four microboring assemblages, called index ichnocoenoses. They are related to specific photic zones or subzones, and therefore are extraordinarily use...

Farrar, W.B., 1976: Using electromyographic biofeedback in treating orofacial dyskinesia. Electromyographic biofeedback can be used to help patients learn to control muscle contractions resulting from orofacial dyskinesia. The size of the electronic equipment and the simplicity of its use make this form of therapy practical for use by...

Hutchinson R., 1977: Presence of pantala flavescens in several localities on the northern shore of charlevoix county quebec canada. Cordulia 3(1): 16

Wagner, O.F.; Nowotny, P.; Vierhapper, H.; Waldhäusl, W., 1990: Plasma concentrations of endothelin in man: arterio-venous differences and release during venous stasis. Endothelin-1 is a recently described endothelium-derived vasoconstricting peptide. Plasma concentrations of immunoreactive (IR-) endothelin were investigated in six healthy young men applying a radioimmunoassay after extraction of endothelin from...

Romdhani, M.S., 1992: Potato varietal testing to soft rot and black leg due to Erwinia spp in Tunisia. Mededelingen van de Faculteit Landbouwwetenschappen Universiteit Gent 57(2-3 PART A-B): 279-286

Yakimova, E.; Kapchina-Toteva, V.; Alexieva, V.; Sergiev, I.; Karanov, E., 1996: Effect of chlorsulfuron (Glean-75) and sucrose on some post-harvest physiological events in cut flowers. Treatment of Cut flowers with cytokinins is found to be beneficial in delaying senescence processes but the response to cytokinin application varies depending on cultivar, stage of flower development and type of cytokinin. The present study was co...