gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2019-10-4-0449gtcrust-938Research ArticleТЕКТОНОФИЗИКАTECTONOPHYSICSСОВРЕМЕННОЕ НАПРЯЖЕННОЕ СОСТОЯНИЕ КОРЫ АПЕННИНСКОГО ПОЛУОСТРОВА И СОПРЕДЕЛЬНЫХ ТЕРРИТОРИЙ (ЦЕНТРАЛЬНОЕ СРЕДИЗЕМНОМОРЬЕ)MODERN STATE OF CRUSTAL STRESSES OF THE APENNINE PENINSULA AND ADJACENT TERRITORIES (CENTRAL MEDITERRANEAN REGION)СаввичевП. А.SavvichevP. A.

м.н.с.,

123242, ГСП-5, Москва Д-242, ул. Большая Грузинская, 10

Junior Researcher,

10 Bol’shaya Gruzinskaya street, Moscow D-242 123242, GSP-5

psavvichev@gmail.comРебецкийЮ. Л.RebetskyYu. L.

докт. физ.-мат. наук, зав. лабораторией,

123242, ГСП-5, Москва Д-242, ул. Большая Грузинская, 10

Doctor of Physics and Mathematics, Head of Laboratory,

10 Bol’shaya Gruzinskaya street, Moscow D-242 123242, GSP-5

reb@ifz.ruИнститут физики Земли им. О.Ю. Шмидта РАНРоссияO.Yu. Schmidt Institute of Physics of the Earth of RASRussian Federation201910122019104921935Copyright © Саввичев П.А., Ребецкий Ю.Л., 20192019Саввичев П.А., Ребецкий Ю.Л.Savvichev P.A., Rebetsky Y.L.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/938

В данной работе рассматриваются возможные модели образования Центрального Средиземноморья и геодинамическая обстановка Апеннинского полуострова. С помощью метода катакластического анализа проводится повторная реконструкция Центрального Средиземноморья. Каталог механизмов очагов землетрясений включает в себя данные Global СМТ (http://www.globalcmt.org), RCMT (http://rcmt2.bo.ingv.it/index.html) и Итальянской базы данных (Italian CMT dataset) (http://rcmt2.bo.ingv.it/Italydataset.html). Каталог составили 662 события с магнитудами 3.6≤Mୠ≤6.5, произошедшие за период с 1977 по 2015 г. Результатом реконструкции является ориентация направлений алгебраически максимальных и минимальных главных напряжений, расположение доменов геодинамического режима и коэффициента Лоде – Надаи, а также ориентация поддвиговых касательных напряжений, действующих со стороны мантии на кору. Проводится сравнение с уже имеющимися данными, которые были получены с помощью методики М.Л. Зобак, найдены отличия в ориентации осей наибольшего горизонтального сжатия в местах, где вид эллипсоида напряжений принимает свои критические значения. По данным об относительных величинах напряжений показано, что формирование наиболее сильных событий (М>6) происходило в областях с минимальными и средними относительными величинами.

This paper discusses models showing the formation of the Central Mediterranean region and the geodynamic setting of the Apennine Peninsula. Cataclastic analysis is used for a repeated reconstruction of the Central Mediterranean region. The catalogue of earthquake focal mechanisms includes 662 events (3.6≤Mb≤6.5) recorded in the study area from 1977 to 2015 (Global CMT, http://www.globalcmt.org; RCMT, http://rcmt2.bo.ingv.it/index.html; Italian CMT dataset, http://rcmt2.bo.ingv.it/Italydataset.html). The reconstruction yielded the directions of principal stresses (including algebraically maximum and minimum ones), locations of domains differing in geodynamic regime, Lode – Nadai coefficients, and orientation of tangential shear stresses acting from the mantle to the crust. By comparing our results to the published data obtained by M.‐L. Zoback’s method, we have identified differences in the orientations of maximum horizontal compression axes at points where the stress ellipsoid takes on its critical values. It is revealed that the strongest earthquakes (M>6) were generated in the areas characterized by the minimum and average relative stress magnitudes.

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The authors declare that there are no conflicts of interest present.