Systems of Lineaments of Magnetic and Gravity Anomalies in the Zone of Convergent Interaction of the Amur and the Eurasian Tectonic Plates

Sergey Vladimirovich Trofimenko, Nikolay Nikolaevich Grib, Aleksandr Ivanovich Melnikov and Tatiana Vladimirovna Merkulova

Modern Applied Science, 2015, vol. 9, issue 8, 195

Abstract: We studied the spatial distribution of anomalies of the gravitational and the magnetic fields at the border between the Amur and the Eurasian plates. Methods of statistical analysis showed that the systems of anomalies of geophysical fields fit into the regular spatial structures and are controlled by lineaments of latitude, longitude and diagonal stretch, as well as zones of plastic-elastic flow of rocks (shear-zone). These facts allowed us to establish time of formation of the orthogonal system of geophysical fields anomalies in the strike azimuths (84-3540). As a result of comparing diagonal system of geophysical fields anomalies with spatial distribution of the fields of contemporary seismicity and epicenters of strong earthquakes, an assumption was made that the diagonal system of lineaments fit into zones of tectonic deformation and has been controlling the epicentral fields of contemporary seismicity since the Mesozoic period of seismotectonic activation. The main result of this study is the synthesis of early scientific works and getting new ideas about the spatial distribution of anomalies of geophysical fields. Establishing the sequence of forming isolated systems of anomalies and relationships between geophysical fields and seismicity is the subject of further research.

Date: 2015
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