Numerical method for geological objects separating by depth using gravity and magnetic data

The computer technology is used for constructing maps of the local and regional anomalies for the magnetic and gravitational fields for the Polar Eurasia sector. The algorithm for separating the anomalies by the different wavelength intervals is based on subsequent upward and downward data continuat...

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Bibliographic Details
Main Authors: Martyshko, Peter S., Fedorova, Natalia V., Rublev, Alexey L.
Format: Conference Proceeding
Language:English
Subjects:
Algorithms
Computer simulation
Geological mapping
Gravitation
Gravitational fields
Ill posed problems
Lithosphere
Magnetic anomalies
Massifs
Multiprocessing
Numerical methods
Regularization
Sedimentary rocks
Seismic analysis
Software
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Summary:The computer technology is used for constructing maps of the local and regional anomalies for the magnetic and gravitational fields for the Polar Eurasia sector. The algorithm for separating the anomalies by the different wavelength intervals is based on subsequent upward and downward data continuation. The downward continuation procedure is an ill-posed problem, and the regularization is applied. Selection of the regularization parameter is based on the interpretation results of the magnetic anomalies along seismic profiles. Recalculation of abnormal fields was carried out using parallel algorithms and software for multiprocessor computers. This work describes the mathematical apparatus and algorithms of parallel computations that are used for development of the related computer technologies. To construct the maps of local anomalies in the upper lithosphere we used calculated data of the magnetic and gravitational fields at 5 km mark. These maps were used for geological mapping. A map of basic and ultrabasic massifs located in the upper part of the basement under the sedimentary rocks was built for the Timan-Pechora and the West Siberian basins.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5114572