Regional petroleum geology
Section editor – PhD in geology and mineralogy Makarevich V.N.
Article # 39_2012 submitted on 06/06/2012 displayed on website on 08/02/2012
14 p.
pdf  Tectonics of the western part of the Laptev sea shelf*
*The article is presented in two languages, Russian and English.

Main structural elements and disjunctive dislocation systems are revealed and traced from the results of integrated geophysical investigations (gravimetry, magnetometry and 2D seismic surveys) conducted in 2005 to 2010 within the Laptev Sea shelf. The breaks of the north-west strike identify the formation of the Laptev Sea Plate and its main structures: the Lena-Taimyr area of border uplifts, West-Laptevrift system and Novosibirsk system of grabens and horsts. The slips of the north-east strike dominate as transversal breaks of Cenozoic activation. Identification of the main disjunctive dislocation systems is the base for tectonic zonation and understanding of region evolution.

Key words: rifting, tectonic block, thrust, fault, slip, strike-slip, Laptev Sea Plate.
article citation Zavarzina G.А., Shkarubo S.I. Tektonika zapadnoy chasti shel'fa morya Laptevykh [Tectonics of the western part of the Laptev sea shelf]. Neftegazovaya Geologiya. Teoriya I Praktika, 2012, vol. 7, no. 3, available at: http://www.ngtp.ru/rub/4/39_2012.eng.pdf
References

   Andieva T.A. Tektonicheskaya pozitsiya i osnovnye struktury morya Laptevykh [Tectonic position and major structures of the Laptev Sea]. Neftegazovaya Geologiya. Teoriya I Praktika, 2008, vol. 3, no. 1, available at: http://www.ngtp.ru/rub/4/8_2008.pdf
   Avetisov G.P. Gipotsentriya i fokal'nye mekhanizmy zemletryaseniy del'ty r. Leny i ee obramleniya [Hypocenter and focal mechanisms of earthquakes of Lena River delta and its frame]. Vulkanologiya i seysmologiya, 1991, no. 6, pp. 59-69.
   Daragan-Sushchova L.A., Petrov O.V., Daragan-Sushchov Yu.I., Rukavishnikova D.D. Novyy vzglyad na geologicheskoe stroenie osadochnogo chekhla morya Laptevykh [A new insight into the geological structure of the sedimentary cover of the Laptev Sea]. Regional'naya geologiya i metallogeniya, 2010, no. 41, pp. 5-17.
   Drachev S.S. O tektonike fundamenta shel'fa morya Laptevykh [On the tectonics of the foundation of the Laptev Sea shelf]. Geotektonika, 2002, no. 6, pp. 60-76.
   Drachev S.S. Tektonika riftovoy sistemy dna morya Laptevykh [Tectonics of rift system of the Laptev Sea bottom]. Geotektonika, 2000, no. 6, pp. 43-58.
   Geologiya i poleznye iskopaemye Rossii [Geology and Mineral Resources of Russia]. Vol. 5, book 1. Arkticheskie moray [Arctic Seas]. Saint Petersburg: VSEGEI, 2004, 468 p.
   Grachev A.F., Demenitskaya R.M., Karasik A.M. Problema svyazi Momskogo kontinental'nogo rifta so strukturoy sredinno-okeanicheskogo khrebta Gakkelya [Issues of connection between Moma continental rift and the structure of the mid-ocean Gakkel Ridge]. Geofizicheskie metody razvedki v Arktike, 1971, vol. 6, pp. 48-50.
   Hinz K., Delisle G., Cramer B., Franke D., Fieguth U., Linderman F., Neben S., Toctman H. & Zeibig M. Cruise report: marine seismic measurements and geoscientific studies on the slope and shelf of the Laptev Sea & East Siberian Sea / Arctic with M.V. “Akademik Lazarev”, I.V. “Kapitan Dranitsin”, Preliminary scientific results. BDR-Report, №116.693, 1997.
   Imaeva L.P., Imaev V.S., Koz'min B.M. Noveyshie struktury i sovremennaya geodinamika Arkticheskogo sektora Verkhoyanskoy skladchatoy sistemy [The latest structures and recent geodynamics of the Arctic sector of the Verkhoyansk fold system]. Geologiya polyarnykh oblastey zemli. Moscow, 2009, vol. 1, pp. 233-236.
   Ivanova N.M., Sekretov S.B., Shkarubo S.I. Dannye o geologicheskom stroenii shel'fa morya Laptevykh po materialam seysmicheskikh issledovaniy [Data on the geological structure of the Laptev Sea shelf based on seismic studies]. Okeanologiya, 1989, vol. XXIX, issue 5, pp. 789-793.
   Koz'min B.M. Seysmicheskie polya Yakutii i mekhanizmy ochagov zemletryaseniy [Seismic field in Yakutia, and earthquake focal mechanisms]. Moscow: Nauka, 1984, 126 p.
   Krasnyy L.I. Novye strukturnye elementy v tektonike territorii Rossii i dna obramlyayushchikh morey [New structural elements in the tectonics of the territory of Russia and the bottom of the framing seas]. Regional'naya geologiya i metallogeniya, 2009, no. 39, pp. 5-13.
   Ob"yasnitel'naya zapiska k Tektonicheskoy karte morey Karskogo i Laptevykh i severa Sibiri. Masshtab 1:2 500 000 [Explanatory Note to Tectonic Map of the Kara and Laptev Seas and Northern Siberia. Scale 1:2 500 000]. Bogdanov N.A., Khain V.E., Rozen O.M., Shipilov E.V., Vernikovskiy V.A., Drachev S.S., Kostyuchenko S.L., Kuzmichev A.B., Sekretov S.B. Moscow: Institut litosfery okrainnykh i vnutrennikh morey RAN, 1998, pp. 87-94.
   Poselov V.A., Butsenko V.V., Pavlenkin A.D. Al'ternativa spredingovoy prirode Evraziyskogo basseyna po seysmicheskim dannym (na primere geotransekta khrebet Gakkelya – khrebet Lomonosova) [An alternative to spreading nature of the Eurasian Basin based on seismic data (by example of the Gakkel Ridge - Lomonosov Ridge)]. Geologo-geofizicheskie kharakteristiki litosfery Arkticheskogo regiona. Saint Petersburg: VNIIOkeangeologiya, 1998, vol. 2, pp. 177-183.
   Shipilov E.V. K tektono-geodinamicheskoy evolyutsii kontinental'nykh okrain Arktiki v epokhi molodogo okeanoobrazovaniya [On the tectonic-geodynamic evolution of continental margins of the Arctic in the period of young ocean formation]. Geotektonika, 2004, no. 5, pp. 26-52.
   Shkarubo S.I., Zavarzina G.A. Stratigrafiya i kharakteristika seysmicheskikh kompleksov osadochnogo chekhla zapadnoy chasti shel'fa morya Laptevykh [Stratigraphy and characteristics of the sedimentary cover sequences of the western Laptev Sea shelf]. Neftegazovaya geologiya. Teoriya i praktika, 2011, vol. 6, no. 2, available at: http://www.ngtp.ru/rub/2/14_2011.pdf