VELOCITY STRUCTURE AND DENSITY INHOMOGENEITIES OF THE WHITE SEA CRUST

The study area is the White Sea basin and adjacent territories. The relevance of the work carried out here is determined by active geodynamics, kimberlite magmatism, and prospects for the hydrocarbon search. The authors set the goal to model the velocity structure of the region’s crust using data from instrumental observations and the Integro software package. A comprehensive interpretation of gravimetric, magnetometric, seismic, petrophysical and geological data has been carried out. With the help of 2D models based on the DSZ profiles and digital maps of geophysical fields, refined density structures of local sections of the earth’s crust have been specified. The developed 3D density model gives a general picture of the deep structure of the region’s crust. Within its framework, the spatial positions of the layers of the velocity reference model are determined and their connections with density inhomogeneities and geophysical anomalies are established.

1. Kazanin G. S., Zhuravlev V. A., Pavlov S. P. Struktura osadochnogo chekhla i perspektivy neftegazonosnosti Belogo morya. [The structure of the sedimentary cover and the White Sea’s oil and gas potentia]. Burenie i neft’, 2006, no. 2, pp. 26—28. (In Russian).

2. Kheraskova T. N., Sapozhnikov R. B., Volozh Yu. A., Antipov M. P. Geodinamika i istoriya razvitiya severa Vostochno-Evropeiskoi platformy v pozdnem dokembrii po dannym regional’nogo seismicheskogo profilirovaniya. [Late Precambrian geodynamics and evolution of the northern East European Platform, as shown by regional seismic profiling]. Geotektonika, 2006, no. 6, pp. 33—51. (In Russian).

3. Geodinamika i vozmozhnaya neftegazonosnost’ Mezenskogo osadochnogo basseina. [Geodynamics and oil and gas potential of the Mezen sedimentary basin]. Red. S. V. Aplonov, D. L. Fedorov. St. Petersburg, Nauka, 2006, 319 p. (In Russian).

4. Zhuravlev V. A. Struktura zemnoi kory Belomorskogo regiona. [Earth crust structure of the White Sea Region]. Razvedka i ohrana nedr, 2007, no. 9, pp. 22—26. (In Russian).

5. Zhuravlev V. A., Shipilov E. V. Stroenie basseinov Belomorskoi riftovoi sistemy. [Structure of basins in the White Sea rift system]. Okeanologiya, 2008, vol. 48, no. 1, pp. 123—131. (In Russian).

6. Baluev A. S., Zhuravlev V. A., Terekhov A. N., Przhiyalgovskii E. S. Tektonika Belogo morya i prilegayushchikh territorii (Ob”yasnitel’naya zapiska k “Tektonicheskoi karte Belogo morya i prilegayushchikh territorii” masshtaba 1:500 000). [Tectonics of the White Sea and adjacent areas (Explanatory note to a “1 500 000 Tectonic map of the White Sea and adjacent areas” 1 500 000)]. Moscow, GEOS, 2012, 104 p. (In Russian).

7. Sistema Belogo morya. Vol. 4. Protsessy osadkoobrazovaniya, geologiya i istoriya. [The White Sea system. Vol. 4. Sedimentation, geology and history]. Moscow, Nauch. mir, 2017, 1030 p. (In Russian).

8. Kutinov Yu. G., Chistova Z. B., Polyakova E. V., Mineev A. L. Tsifrovoe modelirovanie rel’efa dlya prognoza ploshchadei, perspektivnykh na neft’ i almazy. [Digital modelling of relief for forecasting of areas with oil and diamonds]. Aktual’nye problemy nefti i gaza, 2019, no. 1 (24). DOI: 10.29222/ipng.2078-5712.2019-24.art8. (In Russian).

9. Stroenie litosfery rossiiskoi chasti Barents-regiona. [Lithospheric structure of the Russian Barents Sea Region]. Red. N. V. Sharov, F. P. Mitrofanov, M. L. Verba, K. Gillen. Petrozavodsk, KarNTs RAN, 2005, 318 p. (In Russian).

10. Sharov N. V., Slabunov A. I., Isanina E. V., Krupnova N. A., Roslov Yu. V., Shchiptsova N. I. Seismicheskii razrez zemnoi kory po profilyu GSZ-OGT “Susha-more” Kalevala-Kem’-gorlo Beloe more. [Seismic section of the earth crust along the DSS-CDP profile “Land-Sea” Kalevala-Kem-White Sea Throat]. Geofiz. Zhurn, 2010, vol. 32, no. 5, pp. 21—34. (In Russian).

11. Glaznev V. N. Kompleksnye geofizicheskie modeli litosfery Fennoskandii. [Integrated geophysical models of Fennoscandia’s lithosphere]. Apatity, ZAO “KaeM”, 2003, 252 p. (In Russian).

12. Glaznev V. N., Mints M. V., Muravina O. M., Raevsky A. B., Osipenko L. G. Complex geological — geophysical 3D model of the crust in the southeastern Fennoscandian sheild: nature of density layering of the crust and the crust — mantle boundary. Geodynamics & Tectonophysics, 2015, no. 6 (2), pp. 133—170. Available at: https://doi.org/10.5800/GT-2015-6-2-0176.

13. Konanova N. V. Ob”emnye modeli gravimetricheskogo polya Timano-Severoural’skogo regiona i sopredel’nykh territorii. [Volumetric models of the gravimetric field of the Timan-North Uralian Region and adjacent areas]. Vestnik IG Komi NC UrO RAN, 2010, no. 9, pp. 3—5. (In Russian).

14. Krasnopevtseva G. A., Shchukin Yu. K. Ob”emnaya glubinnaya model’ Vostochno-Evropeiskoi platformy po dannym regional’nykh seismicheskikh issledovanii. [Volumetric deep model of the East European Platform based on regional seismic studies]. Region. geologiya i metallogeniya, 2000, no. 10, pp. 75—85. (In Russian).

15. Pospeeva E. V., Vitte L. V. Osobennosti stroeniya zemnoi kory Belomorskogo i chastichno Karel’skogo blokov po dannym magnitotelluricheskikh issledovanii. [Structural characteristics of the earth crust of the White Sea block and part of the Karelian block, as shown by magnetotelluric studies]. Geofizika, 2011, no. 3, pp. 64—72. (In Russian).

16. Cheremisina E. N., Finkel’shtein M. Ya., Lyubimova A. V. GIS INTEGRO — importozameshchayushchii programmno-tekhnologicheskii kompleks dlya resheniya geologo-geofizicheskikh zadach. [GIS INTEGRO — an import-replacing software-technological complex for solving geologo-geophysical problems]. Geoinformatika, 2018, no. 3, pp. 8—17. (In Russian).

17. Sharov N. V., Zhuravlev A. V. Stroenie zemnoi kory Belogo morya i prilegayushchikh territorii. [Crustal structure of the White Sea and adjacent areas]. Arktika: ekologiya i ekonomika, 2019, no. 3 (35), pp. 62—72. DOI: 10.25283/2223-4594-2019-3-62-72. (In Russian).

18. Sharov N. V., Bakunovich L. I., Belashev B. Z., Zhuravlev A. V., Nilov M. Yu. Geologo-geofizicheskie modeli zemnoi kory Belomor’ya. [Geologo-geophysical models of the earth crust of the White Sea Region]. Geodinamika i tektonofizika. Accepted for publication. (In Russian).

19. Mitrofanov F. P., Sharov N. V., Zagorodny V. G., Glaznev V. N., Korja A. K. Crustal Structure of the Baltic Shield along the Pechenga-Kostomuksha-Lovisa Geotraverse. Intern. Geology Rev., 1998, vol. 40, no. 11, pp. 990—997. DOI:10.1080/00206819809465250.

20. Sharov N. V. Litosfera po severnoi Evrope po seismicheskim dannym. [Lithosphere of Northern Europe, as shown by seismic data]. Petrozavodsk, KarNC RAN, 2017, 173 p. (In Russian).

21. Pimanova N. N., Spiridonov V. A., Sharov N. V., Lyubimova A. V., Senner A. E Raspredelenie plotnostnykh neodnorodnostei v zemnoi kore i mantii yugo-vostochnoi chasti Fennoskandinavskogo shchita po kompleksu geologo-geofizicheskikh dannykh. [Distribution of density heterogeneities in the earth crust and mantle of the southeastern Fennoscandian Shield, as shown by geological and geophysical data]. Geoinformatika, 2018, no. 1, pp. 43—51. (In Russian).

22. Sapozhnikov R. B. Effektivnost’ seismorazvedki MOV GT pri izuchenii geologicheskogo stroeniya Mezenskoi sineklizy. [Efficiency of EWM DP seismic prospecting for the study of the geological structure of the Mezen syneclise]. Razvedka i ohrana nedr, 2003, no. 5. pp. 32—35. (In Russian).

23. Glubinnoe stroenie i seismichnost’ Karel’skogo regiona i ego obramleniya. [Deep structure and seismicity of the Karelian Region and surrounding areas]. Red. N. V. Sharov. Petrozavodsk, KarNTs RAN, 2004, 353 p. (In Russian).

24. Model’ zemnoi kory i verkhnei mantii po rezul’tatam glubinnogo seismoprofilirovaniya. [A model of the earth crust and the upper mantle based on deep seismic profiling]. Red. Yu. M. Erinchek. St. Petersburg, VSEGEI, 2007, 245 p. (In Russian).

25. Baluev A. S., Zhuravlev V. A., Przhiyalgovskii E. S. Novye dannye o stroenii Tsentral’noi chasti paleoriftovoi sistemy Belogo morya. [New data on the structure of the central paleorift system of the White Sea]. Dokl. Akad. nauk, 2009, vol. 427, no. 2, pp. 891—896. DOI: 10.1134/S1028334X09060014. (In Russian).

26. Gosudarstvennaya geologicheskaya karta Rossiiskoi Federatsii. Masshtab 1:1 000 000 (tret’e pokolenie). Seriya Baltiiskaya. List Q-(35), 36 — Apatity. Ob”yasnitel’naya zapiska. [1:1 000 000 scale state geological map of the Russian Federation (third generation). Baltic series. Sheet Q-(35), 36 — Apatity. Explanatory note]. Murmansk; St. Petersburg, Kartograf. f-ka VSEGEI, 2009, 487 p. (In Russian)

27. Gosudarstvennaya geologicheskaya karta Rossiiskoi Federatsii. Masshtab 1:1 000 000 (tret’e pokolenie). Seriya Baltiiskaya. List Q-37 — Arkhangel’sk. Ob”yasnitel’naya zapiska. [1:1 000 000 scale state geological map of the Russian Federation (third generation). Baltic series. Sheet Q-37 — Arkhangelsk. Explanatory note]. Murmansk; St. Petersburg, Kartograf. f-ka VSEGEI, 2009, 338 p. (In Russian).

28. Gosudarstvennaya geologicheskaya karta Rossiiskoi Federatsii. Masshtab 1:1 000 000 (tret’e pokolenie). Seriya Mezenskaya. List Q-38- Mezen’. Ob”yasnitel’naya zapiska. [1:1 00 0000 state geological map of the Russian Federation (third generation). Mezen series. Sheet Q-38- Mezen. Explanatory note]. Murmansk; St. Petersburg, Kartograf. f-ka VSEGEI, 2009, 350 p. (In Russian).

29. Baluev A. S., Brusilovskii Yu. V., Ivanenko A. N. The crustal structure of Onega-Kandalaksha paleorift identified by complex analysis of the anomalous magnetic field of the White Sea. Geodynamics & Tectonophysics, 2018, 9 (4), pp. 1293—1312. DOI: 10.5800/GT-2018-9-4-0396.

30. Kashubin S. N. Petrov O. V., Androsov E. A., Morozov A. F., Kaminskii V. D., Poselov V. A. Karta moshchnosti zemnoi kory Tsirkumpolyarnoi Arktiki. [A map of the crustal thickness of Circumpolar Arctic]. Region geologiya i metallogeniya, 2011, no. 46, pp. 5—13. (In Russian).

31. Golubev Yu. K., Vaganov V. I., Prusakova N. A. Printsipy prognozirovaniya almazoperspektivnykh ploshchadei na Vostochno-Evropeiskoi platforme. [Principles of forecasting diamondiferous areas on the East European Platform]. Rudy i metally, 2005, no. 1, pp. 55— 70. (In Russian).