Superdeep Drilling and Its Impact on the Seismic Models of the Fennoscandian Shield

  • N. V. SharovEmail author
Conference paper
Part of the Springer Proceedings in Earth and Environmental Sciences book series (SPEES)


Attempts to interpret the origin of seismic boundaries in the crystalline crust in the Fennoscandian Shield from deep drilling records and available geological and geophysical data were made by a number of authors. This article contains an overview of the most essential results reported so far. Deep drilling was conducted in several regions of the Fennoscandian Shield: Kola, Russia (SG-3), to a depth of 12,262 m (1970–1990); Gravberg (GR) and Stenberg-I, Central Sweden, to a depth of 6337 m (1986–1987); and 6529 m (1991–1992); Outokumpu (OU), SE Finland, to a depth of 2516 m (2004–2005); Pogranichnaya (P-1), Sredny Peninsula, Murmansk Region, Russia, to a depth of 5200 m (2004–2006); and Onega, Central Karelia, Russia (ON), to a depth of 3537 m (2007–2008). The results obtained were analyzed. They show considerable discrepancies between forecast seismic-geological models and the actual structure of the upper portion of the continental crust. Deep drilling has proved that heterogeneities in the upper portion of the crystalline crust, indicated by geophysical data, are due to changes in the composition and physical conditions of deep-seated rocks. Therefore, even approximate rock composition cannot be uniquely estimated from elastic wave velocities alone. Deep drilling showed the real pattern and origin of low-velocity zones in the upper portion of the crust and did not show that layers become more homogeneous with depth. The origin of intra-crustal seismic boundaries could be associated with various factors, such as variations in mineralogical composition, structural and textural differences between the rocks, and a thermodynamic setting.


Deep drilling Fennoscandian shield Seismic boundaries Crystalline crust 


  1. 1.
    Glaznev, V.N., Sorokhtin, N.O., Rayevsky, A.B., Kozlov, N.E.: Identifying crustal reflections in the Baltic Shield-Barents Sea Plate transition zone as a basis for forecasting useful minerals. Vestnik VGU. Series: Geology, no. 1, pp. 95–102 (2014). (in Russian)Google Scholar
  2. 2.
    Yesipko, O.A., Neronova, I.V., Sharov, N.V.: Geophysical studies of the Onega Parametric drillhole, p. 62. OAO NPC Nedra (2014). (in Russian)Google Scholar
  3. 3.
    Kozlovsky, E.A. (ed.): Kola Superdeep Drill Hole. In: Study of the deep structure of the continental crust by boring the Kola Superdeep Drillhole, p. 490. Nedra, Moscow (1984). (in Russian)Google Scholar
  4. 4.
    Orlov, V.P., Laverov, N.P. (eds.): Kola Superdeep Drill Hole. In: Scientific results and research experience, p. 260. MF Tekhnoneftegaz, Moscow (1998). (in Russian)Google Scholar
  5. 5.
    Litvinenko I.V.: Seismic method for the study of the deep structure of the Baltic Shield, vol. 46, no. 2, pp. 3–13. Zap LGI (1963). (in Russian)Google Scholar
  6. 6.
    Glushanin, L.V., Sharov, N.V., Shchiptsov, V.V. (eds.): Paleoproterozoic Onega structure: geology, tectonics, deep structure and mineral genesis, p. 431. KarRC, RAS, Petrozavodsk (2011). (in Russian)Google Scholar
  7. 7.
    Sharov, N.V., Isanina, E.V., Pozhilenko, V.I., Stupak, V.M.: Increasing the validity of the geological models of the earth crust in the Sredny-Rybachy peninsula area by complexing CDP, DSS and PSM seismic methods. Uralski geofizicheski vestnik, no. 4, pp. 98–105. Yekaterinburg. Izd. IGUr, RAS (2007). (in Russian)Google Scholar
  8. 8.
    Sharov, N.V.: Lithosphere of North Europe based on seismic data, p. 173. Petrozavodsk KarRC, RAS (2017). (in Russian)Google Scholar
  9. 9.
    Beswick A.J.: Gravberg-1: Well design and drilling preparations. In: Boden, A., Eriksson, K.G. (eds.) Deep Drilling in Crystalline Bedrock. Volume 1: The Deep Gas Drilling in the Siljan Impact Structure, Sweden and Astroblemes, pp. 55–64. Springer, Berlin (1988)CrossRefGoogle Scholar
  10. 10.
    Koistinen, T., Stephens, M.B., Bogachev, V., Nordgulen, O., Wennerström, M., Korchonen, J.: Geological map of the Fennoscandian Shield, scale 1:2000000. Geological Survey of Finland, Norway and Sweden and North-West Department of Natural Resources of Russia (2001)Google Scholar
  11. 11.
    Kukkonen, I.T., Rath, V., Kivekäs, L., Šafanda, J., Čermák, V.: Geothermal studies of the Outokumpu deep drill hole. In: Kukkonen, I.T. (ed.) Outokumpu Deep Drilling Project 2003–2010, Special Paper 51, pp. 181–198. Geological Survey of Finland, Espoo (2011)Google Scholar

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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Karelian Research Centre, RAS, Institute of GeologyPetrozavodskRussia

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