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Seismotectonic analysis of the Viraayots–Karabakh zone (Armenia) and the adjacent areas of Lesser Caucasus

https://doi.org/10.5800/GT-2021-12-1-0519

Abstract

The territory of Armenia, although relatively small, is geologically and tectonically complex. Its complexity is not only due to a dense network of faults. It results from a complicated history of tectonic development including several phases of mountain formation and planation, and the extensive development of fold-block, tectonic and magmatic processes. An important scientific task is identification of earthquake-prone structural blocks by analysing seismotectonic data on geotectonic zones in Armenia. This article describes the seismotectonic analysis of geological and geophysical data on the Viraayots-Karabakh zone.

We used a wide spectrum of modern tectonic-geomorphological indices and GIS technologies in order to assess the neotectonic (Neogene – Quaternary) activity of the main block units of the study area and to classify the block units by their tectonic activity levels. Tectonics of the study area is contrasting, and many tectonically active blocks are in the immediate neighbourhood with passive blocks.

Based on the records of seismic events of various magnitudes and historic earthquake data, we analysed modern seismicity of the block units. For each block, a quantitative analysis of its total seismic energy release was performed, and relationships between the released seismic energy values and the number of recorded earthquakes were analyzed. Based on such analysis, we identify a group of blocks wherein the total released seismic energy values are high, but the numbers of seismic events recorded in these blocks are rather limited. In the context of block tectonic activity, analysing these data makes it possible to detect the blocks with the highest probability of the occurrence of strong earthquakes.

About the Authors

K. S. Ghazaryan
Nazarov Institute of Geophysics and Engineering Seismology, Armenian National Academy of Sciences
Armenia

5 V. Sargsyan St, Gyumri 3115



R. S. Sargsyan
Nazarov Institute of Geophysics and Engineering Seismology, Armenian National Academy of Sciences; Nalbandyan Shirak State University
Armenia

5 V. Sargsyan St, Gyumri 3115

4 Paruyr Sevak St, Gyumri 3126



References

1. Babayan T.O., 2006. Atlas of Strong Earthquakes of the Republic of Armenia, Artsakh and Adjacent Territories from Historical Times to 2003. Yerevan, 140 p. (in Russian) [Бабаян Т.О. Атлас сильных землетрясений Республики Армении, Арцаха и сопредельных территорий от исторических времен до 2003 г. Ереван, 2006. 140 с.].

2. Bath M., Duda S.J., 1964. Earthquake Volume, Fault Plan Area, Seismic Energy, Strain, Deformation and Related Quantities. Annals of Geophysics 17 (3), 353–368. https://doi.org/10.4401/ag-5213.

3. Burmin V.Yu., Shemeleva I.B., Fleifel L.D., Avetisyan A.M., Kazaryan K.S., 2016. Results of Seismological Data Processing for the Territory of Armenia. Problems of Engineering Seismology 43 (1), 29–39 (in Russian) [Бурмин В.Ю., Шемелева И.Б., Флейфель Л.Д., Аветисян А.М., Казарян К.С. Результаты обработки сейсмологических данных для территории Армении // Вопросы инженерной сейсмологии. 2016. Т. 43. № 1. С. 29–39].

4. Burmin V.Yu., Shemeleva I.B., Fleifel L.D., Avetisyan A.M., Kazaryan K.S., 2018. Spatial Distribution of Crustal Earthquakes in the Caucasus. Problems of Engineering Seismology 45 (1), 39–48 (in Russian) [Бурмин В.Ю., Шемелева И.Б., Флейфель Л.Д., Аветисян А.М., Казарян К.С. Пространственное распределение коровых землетрясений Кавказа // Вопросы инженерной сейсмологии. 2018. Т. 45. № 1. С. 39–48]. https://doi.org/10.21455/VIS2018.1-4.

5. Clarence R.A., 1975. Geological Criteria for Evaluating Seismicity. Geological Society of America Bulletin 86 (8), 1041–1057. https://doi.org/10.1130/0016-7606(1975)86%3C1041:GCFES%3E2.0.CO;2.

6. Etchebehere M.L.C., Saad A.R., Santoni G.C., Casado F.C., Fulfaro V.J., 2006. Detection of Probable Neotectonic Deformations in the Rio Do Peixe Valley, Western Region of São Paulo, Using RDE (Declivity Extension Ratio) Indices in Drainage Segments. Geosciences 25, 271–287.

7. Gabrielyan A.A., 1974. Geotectonic Zoning of the Territory of the Armenian SSR. Proceedings of the Armenian SSR Academy of Sciences, Earth Sciences 4, 3–21 (in Russian) [Габриелян А.А. Геотектоническое районирование территории Армянской ССР // Известия АН АрмССР. Науки о Земле. 1974. № 4. С. 3–21].

8. Gabrielyan A.A., Piruzyan S.A., 1972. Seismotectonic Schematic Map of Armenia and Adjacent Parts of the Ante-Caucasus. Bulletin of the Armenian SSR Academy of Sciences, Earth Sciences 4, 24–33 (in Russian) [Габриелян А.А., Пирузян С.А. Сейсмотектоническая схема Армении и сопредельных частей Антикавказа // Известия АН АрмССР. Науки о Земле. 1972. № 4. С. 24–33].

9. Gasparyan G.S., Oganesyan A.O., Sargsyan R.S., 2019. About the Level of Seismotectonic Potential of the Anatolia–Caucasus–Iran Area of the Mediterranean–Pacific Belt. In: Problems of Tectonics of Continents and Oceans. Proceedings of the LI Tectonic Meeting (January 29 – February 02, 2019). Vol. 1. GEOS, Moscow, p. 135–140 (in Russian) [Гаспарян Г.С., Оганесян А.О., Саргсян Р.С. Об уровне сейсмотектонического потенциала Анатолийско-Кавказско-Иранского региона Средиземноморско-Тихоокеанского пояса // Проблемы тектоники континентов и океанов: Материалы LI тектонического совещания (29 января – 02 февраля 2019 г.). Т. 1. М.: ГЕОС, 2019. С. 135–140].

10. Gentana D., Sulaksana N., Sukiyah E., Yuningsih E., 2018. Index of Active Tectonic Assessment: Quantitative-Based Geomorphometric and Morphotectonic Analysis at Way Belu Drainage Basin, Lampung Province, Indonesia. International Journal of Advanced Science Engineering Information Technology 8 (6), 2460–2471.

11. Ghazaryan K.S., Sargsyan R.S., 2020. General Regularities of Seismic Activity of Northern Armenia in Connection with Block Structure and Tectonic Activity. Geodynamics & Tectonophysics 11 (3), 595–605 (in Russian) [Казарян К.С., Саргсян Р.С. Общие закономерности сейсмической активности северной Армении в связи с блоковым строением и тектонической активностью территории // Геодинамика и тектонофизика. 2020. Т. 11. № 3. С. 595–605]. https://doi.org/10.5800/GT-2020-11-3-0493.

12. Imaev V.S., Imaeva L.P., Smekalin O.P., Koz’min B.M., Grib N.N., Chipizubov A.V., 2015. A Seismotectonic Map of Eastern Siberia. Geodynamics & Tectonophysics 6 (3), 275–287 (in Russian) [Имаев В.С., Имаева Л.П., Смекалин О.П., Козьмин Б.М., Гриб Н.Н., Чипизубов А.В. Карта сейсмотектоники Восточной Сибири // Геодинамика и тектонофизика. 2015. Т. 6. № 3. С. 275–287]. https://doi.org/10.5800/GT-2015-6-3-0182.

13. Karapetyan J.K., Sargsyan R.S., Kazaryan K.S., Dzeranov B.V., Dzeboev B.A., Karapetyan R.K., 2020. Current State of Exploration and Actual Problems of Tectonics, Seismology and Seismotectonics of Armenia. Russian Journal of Earth Sciences 20, ES2005. https://doi.org/10.2205/2020ES000709.

14. Mahmood S., Gloaguen R., 2012. Appraisal of Active Tectonics in Hindu Kush: Insights from DEM Derived Geomorphic Indices and Drainage Analysis. Geoscience Frontiers 3 (4), 407–428. https://doi.org/10.1016/j.gsf.2011.12.002.

15. Moussi A., Rebai N., Chaieb A., Saadi A., 2018. GIS-Based Analysis of the Stream Length-Gradient Index for Evaluating Effects of Active Tectonics: A Case Study of Enfidha (North-East of Tunisia). Arabian Journal of Geosciences 11, 123. https://doi.org/10.1007/s12517-018-3466-x.

16. Oganesyan S.M., Oganesyan A.O., Geodakyan E.G., Gasparyan G.S., 2008. Identification of Earthquake Focal Zones Based on Seismological Identification and Parameterization of the Main Elements of the Structural-Dynamic Model of the Crust in Armenia. Proceedings of NAS RA. Earth Sciences XLI (1), 39–43 (in Russian) [Оганесян С.М., Оганесян А.О., Геодакян Э.Г., Гаспарян Г.С. Выделение зон возникновения очагов землетрясений на основе сейсмологической идентификации и параметризации основных элементов структурно-динамической модели земной коры Армении // Известия НАН РА. Науки о Земле. 2008. Т. XLI. № 1. С. 39–43].

17. Sargsyan R.S., Boinagryan V.R., 2019. Morphostructural Zoning Scheme for the Territory of the Republic of Armenia. Proceedings of the YSU. Geology and Geography 53 (3), 179–184 (in Russian) [Саргсян Р.С., Бойнагрян В.Р. Схема морфоструктурного районирования территории РА // Ученые записки ЕГУ. Геология и география. 2019. Т. 53. № 3. С. 179–184].

18. Sargsyan R.S., Boinagryan V.R., Chartaryan E.A., 2019. Tectonic-Geomorphological Analysis of Morphostructural Units of the Northern Folded Zone in Armenia for Assessment of Tectonic Activity. Scientific Papers of Shirak State University. Vol. A (1). P. 87–100 (in Russian) [Саргсян Р.С., Бойнагрян В.Р., Чартарян Э.А. Тектоно-геоморфологический анализ морфоструктурных единиц северной складчатой зоны Армении с целью оценки тектонической активности // Ученые записки ШГУ. 2019. Вып. А. № 1. С. 87–100].

19. Sargsyan R.S., Kazaryan K.S., 2020. Current State and Ways for Solving Problems of Identification of Strong Earthquake Focal Zones and Assessment of Seismotectonic Potential of the Territory of Armenia. In: Fundamental Problems of Tectonics and Geodynamics. Proceedings of the LII Tectonic Meeting (January 28 – February 01, 2020). Vol. 2. GEOS, Moscow, p. 281–286 (in Russian) [Саргсян Р.С., Казарян К.С. Современное состояние и пути решения задач по выделению очаговых зон сильных землетрясений и оценки сейсмотектонического потенциала территории Армении // Фундаментальные проблемы тектоники и геодинамики: Материалы LII тектонического совещания (28 января – 01 февраля 2020 г.). М.: ГЕОС, 2020. Т. 2. С. 281–286].

20. Sim L.A., Bogomolov L.M., Bryantseva G.V., Savvichev P.A., 2017. Neotectonics and Tectonic Stresses of the Sakhalin Island. Geodynamics & Tectonophysics 8 (1), 81–202 (in Russian) [Сим Л.А., Богомолов Л.М., Брянцева Г.В., Саввичев П.А. Неотектоника и тектонические напряжения острова Сахалин // Геодинамика и тектонофизика. 2017. Т. 8. № 1. С.181–202]. https://doi.org/10.5800/GT-2017-8-1-0237.

21. Singh O., Sarangi A., Milap C., 2008. Hypsometric Integral Estimation Methods and its Relevance on Erosion Status of North-Western Lesser Himalayan Watersheds. Water Resources Management 22, 1545–1560. https://doi.org/10.1007/s11269-008-9242-z.

22. Strahler A., 1964. Quantitative Geomorphology of Drainage Basins and Channel Networks. In: V.T. Chow (Ed.), Handbook of Applied Hydrology. New York, 39–76.


Review

For citations:


Ghazaryan K.S., Sargsyan R.S. Seismotectonic analysis of the Viraayots–Karabakh zone (Armenia) and the adjacent areas of Lesser Caucasus. Geodynamics & Tectonophysics. 2021;12(1):157-165. (In Russ.) https://doi.org/10.5800/GT-2021-12-1-0519

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