SPATIAL CORRELATIONS BETWEEN THE TERRAIN FEATURES, GRAVITATIONAL FIELD AND SEISMIC VELOCITY ANOMALIES IN THE CENTRAL KAMCHATKA REGION
E.I. Esin1,2, A.N. Vasilevskiy1,2, N.A. Bushenkova1
1Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: Tectonic structures, Bouguer gravity anomaly, anomalous magnetic field, seismic tomography, seismic wave velocity anomalies, two-dimensional Laplacian function, vertical derivative of gravity field, Wiener filtering
Abstract
Different approaches to tectonic zoning and different types (complexes) of used data, on the basis of which the zoning is performed, cause the plurality of tectonic schemes of Kamchatka and the Kamchatka region previously obtained by different authors. In this work, a joint analysis of gravity field anomalies, gravity field and relief transforms, magnetic field and modern seismotomographic models of velocity anomalies was used to study spatial relationships of tectonic manifestations of geological processes. As a result of this study, a linear-block type tectonic scheme was constructed. The obtained linear structural elements are in good agreement with the data of potential fields, results and previously published materials. The productivity of the presented method of complex analysis of geophysical fields for revealing their spatial relations and block structures of the environment is shown. The analysis outcomes can be used to establish spatial constraints for gravity field sources when solving inverse problems, potential field separation problems and their detailed geological interpretation.
|
