Использование Спектра Накамуры Для Зонирования Пород В Кровле Докембрийского Фундамента

Abstract

The results of a study of a two-phase Elkin intrusion overlain by a sedimentary cover located in the roof of the Precambrian basement of the Khopersky megablock of the Voronezh Crystal massif (VCM) are presented. The primary records previously obtained during the seismic microdistricting of the Elkinsky ЛУЧШИЙ ИССЛЕДОВАТЕЛЬСКИЙ ПРОЕКТ 2022 115 МЦНП «Новая наука» license area were used. Three-component seismic recordings of microseismic noise were processed according to the author's methodology and three-component spectral models of microseismic background were obtained. Considering the normalized ratios of the Nakamura spectra of the models of "field" observation points to the "base", it was found that the observation points that had minimum ratio values in the frequency range 2-5.5 Hz were spatially confined to the diorites of the Mammon complex, and those with maximum values were grouped in the zone of the norites of the Elan complex. The results show the fundamental possibility and prospects of using the Nakamura spectrum for zoning the roof rocks of the Precambrian foundation of the VCM, as well as the structure of multiphase intrusions.