The approximation of anomalous magnetic field by array of magnetized rods

Бызов, Д. Д.; Lev, Muravyev; Fedorova, N. V.

doi:10.1063/1.4992734

Cited by 5 publications

(2 citation statements)

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“…Model rods are small parametric of source class, it increases stability of the inverse problem solution. To minimize the functional (5), various nonlinear programming methods were used and the Polack-Ribier method was selected, which converges faster than the others [Byzov et al, 2017]. The algorithm was implemented using the parallel computing technology on the NVIDIA GPU (GeForce GTX 780).…”

Section: The Approximation Of Anomalous Magnetic Field By Array Of Magnetized Rodsmentioning

confidence: 99%

“…The correction values of centennial variations in the geomagnetic field were calculated based on the IGRF [IAGA Division, 1995;Olsen, 2002]. Resulting from these works, a digital model of the map for the anomalous geomagnetic field Δ in the Uralian Region and its vicinity (East European Plain and West Siberia) was created [Chursin et al, 2008]. We used a set of this data to model the sources of magnetic anomalies in the layers of the Earth's crust.…”

Section: Introductionmentioning

confidence: 99%

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Numerical algorithms for structural magnetometry inverse problem solving

Мартышко¹,

Fedorova²,

Rublev³

2021

Russ. J. Earth Sci.

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New methods for studying the anomalous magnetic field of the lithosphere and modeling the sources of anomalies in different layers of the Earth's crust are given in this article. The interpretation consists of three stages: separation of anomalies from the sources in different layers of the Earth's crust, data conversion to the magnetic pole and solving the inverse problem of finding the surface of sources. To isolate anomalies from different layers of the earth's crust, we used a technique based on the subsequent continuation of magnetic data up and down. Calculation of the vertical component of the anomalous magnetic field by its absolute value and conversion to the pole is based on the approximation of the anomalies of the magnetic induction modulus through a set of singular sources -magnetized rods. To solve the nonlinear inverse problem and calculate the boundaries separating layers with different magnetization, the method of local corrections was applied. The new computer technology was created using parallel computing in the multiprocessor computer systems. To demonstrate the developed methods, we chose the region of Western Urals 300 km × 230 km, where the large magnetic anomalies are located. Anomalies from various layers of the Earth's crust were identified and the models of the sources of magnetic anomalies in the granite layer and the surface of the basaltic layer were constructed. The study revealed basic-ultramafic massifs under a thick sedimentary cover, as well as extended deep belts and large elevations of the basalt layer of the Earth's crust. The results clarify the lithosphere structure of the Western Urals and can be used for geodynamic reconstructions.

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Section: The Approximation Of Anomalous Magnetic Field By Array Of Magnetized Rodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%