gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2022-13-2-0589gtcrust-1450Research ArticleСтатьиВИБРОСЕЙСМИЧЕСКИЕ ИССЛЕДОВАНИЯ БАЙКАЛЬСКОЙ РИФТОВОЙ ЗОНЫ С МОЩНЫМ ВИБРАТОРОМ ЦВО-100VIBROSEISMIC INVESTIGATIONS OF THE BAIKAL RIFT ZONE WITH A POWERFUL CVO-100 VIBRATORКовалевскийВ. В.KovalevskyV. V.

630090, Новосибирск, пр-т Академика Лаврентьева, 6

6 Academician Lavrentiev Ave, Novosibirsk 630090

kovalevsky@sscc.ruСобисевичА. Л.SobisevichA. L.

123242, Москва, ул. Большая Грузинская, 10, стр. 1

10-1 Bolshaya Gruzinskaya St, Moscow 123242

ТубановЦ. А.TubanovTs. A.

670047, Улан-Удэ, ул. Сахьяновой, 6а, Республика Бурятия

6а Sakhyanova St, Ulan-Ude 670047, Republic of Buryatia

БрагинскаяЛ. П.BraginskayaL. P.

630090, Новосибирск, пр-т Академика Лаврентьева, 6

6 Academician Lavrentiev Ave, Novosibirsk 630090

ГригорюкА. П.GrigoryukA. P.

630090, Новосибирск, пр-т Академика Лаврентьева, 6

6 Academician Lavrentiev Ave, Novosibirsk 630090

Институт вычислительной математики и математической геофизики СО РАНРоссияInstitute of Computational Mathematics and Mathematical Geophysics, Siberian Branch of the Russian Academy of SciencesRussian FederationИнститут физики Земли им. О.Ю. Шмидта РАНРоссияSchmidt Institute of Physics of the Earth, Russian Academy of SciencesRussian FederationГеологический институт СО РАН; Бурятский филиал ФИЦ ЕГС РАНРоссияGeological Institute, Siberian Branch of the Russian Academy of Sciences; Buryat Branch of the Federal Research Center of the Geophysical Survey, Russian Academy of SciencesRussian Federation202218042022132589589Copyright © Ковалевский В.В., Собисевич А.Л., Тубанов Ц.А., Брагинская Л.П., Григорюк А.П., 20222022Ковалевский В.В., Собисевич А.Л., Тубанов Ц.А., Брагинская Л.П., Григорюк А.П.Kovalevsky V.V., Sobisevich A.L., Tubanov T.A., Braginskaya L.P., Grigoryuk A.P.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/1450

В статье приведен обзор вибросейсмических исследований, выполняемых в Байкальской рифтовой зоне с использованием уникальной научной установки – мощного сейсмического вибратора ЦВО-100, установленного на Южно-Байкальском геодинамическом полигоне СО РАН. Работы проводятся по нескольким методикам, ориентированным на решение различных задач: исследование структуры земной коры и верхней мантии в Байкальской рифтовой зоне (БРЗ), активный вибросейсмический мониторинг, верификацию скоростных моделей земной коры. Для изучения структуры земной коры и верхней мантии проводится регистрация волнового поля вибратора на стационарной региональной сети сейсмостанций Бурятского и Байкальского филиалов ФИЦ ЕГС РАН, а также экспериментальные исследования с развертыванием мобильных сейсмических групп (ИВМиМГ СО РАН, ИФЗ РАН, ГИН СО РАН). Целью работ является проведение глубинного вибросейсмического зондирования земной коры (вибро-ГСЗ) в зоне сочленения Сибирской платформы, БРЗ и Саяно-Байкальской складчатой области. Основу методики составляет изучение вибрационных сейсмограмм с определением времен прихода основных групп волн и их увязка со скоростными моделями земной коры в БРЗ. С использованием вибратора ЦВО-100 и региональной сети сейсмических станций проводится активный вибросейсмический мониторинг южной части БРЗ. Область активного мониторинга составляет примерно 500×200 км. При проведении вибросейсмического мониторинга были детально исследованы сезонные вариации волнового поля вибратора и разработаны методики спектральной коррекции сейсмограмм. С использованием сейсмического вибратора ЦВО-100 была выполнена экспериментальная часть работ по верификации скоростных моделей земной коры, построенных по данным экспериментов BEST и PASSCAL. Работы по вибро-ГСЗ на профиле Байкал – Улан-Батор проводились ИВМиМГ СО РАН, ГИН СО РАН, Бурятским филиалом ФИЦ ЕГС РАН (Россия) совместно с ИАГ МАН (Монголия). 

The article provides an overview of vibroseismic studies carried out in the Baikal rift zone using LargeScale Research Facilities – a powerful CVO-100 seismic vibrator, installed at the South Baikal geodynamic test site SB RAS. Research is carried out according to several methods focused on different tasks: study of the structure of the Earth’s crust and upper mantle in the BRZ, active vibroseismic monitoring, and verification of velocity models of the Earth’s crust. To study the structure of the Earth’s crust and the upper mantle, there were done the vibrator-generated wavefield recordings at the stationary regional network of seismic stations in the Buryat and Baikal branches of the Federal Research Center of the GS RAS, as well as the experimental studies involving the mobile networks deployment (ICMMG SB RAS, SIPE RAS, GIN SB RAS). The aim of the work is to carry out deep vibroseismic sounding of the Earth’s crust (vibro-DSS) at the junction of the Siberian platform, the BRZ and the Sayan-Baikal folded area. The methodology is based on the study of vibration seismograms with the determination of arrival times of the main groups of waves and their correlation with the velocity models of the Earth’s crust in the BRZ. A CVO-100 vibrator and a regional network of seismic stations are used to carry out active vibroseismic monitoring of the southern part of the BRZ. The active monitoring area is about 500×200 km. During vibroseismic monitoring, there were done thorough studies of seasonal variations of the vibrator-generated wavefield and the development of techniques for spectral correction of seismograms. A seismic vibrator CVO-100 was used to carry out experimental verification of the velocity models of the Earth’s crust, developed based on the BEST and PASSCAL experimental data. The vibrational deep seismic sounding (vibro-DSS) on the Baikal – Ulan Bator profile was carried out by the ICMMG SB RAS, GIN SB RAS and BB FRC GS RAS (Russia) in cooperation with IAG MAN (Mongolia). 

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