A Compilation of Geophysical Data from the Lazarev Sea and the Riiser-Larsen Sea, Antarctica


On the basis of new geophysical data acquired by the Federal Institute of Geosciences and Natural Resources (BGR) and the Polar Marine Geological Research Expedition (PMGRE) as well as existing data new geophysical maps were compiled for the Lazarev Sea and the Riiser-Larsen Sea between 10°W and 25°E. The new results are: – The drastic change in the strike direction of the volcanic Explora Wedge between longitudes 10°W and 5°W is accompanied with a gradual change from one major wedge, i.e. the Explora Wedge, into at least two wedge-shaped volcanic constructions, each manifested by a sequence of seaward-dipping reflectors in the seismic records. – The southern Lazarev Sea is best described as a continental margin affected by multiple rifting episodes accompanied with transient volcanism. – A distinct N80°E striking basement depression separates the volcanic-prone continental margin of the southern Lazarev Sea from oceanic crust upon which the Maud Rise rests. The southern scarp of the narrow depression was presumably aligned with the eastern scarp of the Mozambique Ridge during the Early Cretaceous. – The Astrid Ridge proper occupies the transition from the volcanic-prone continental margin of the Lazarev Sea to old oceanic crust of the Riiser -Larsen Sea, and it rests upon a large volcanic apron which covers the basement of the southwestern Riiser-Larsen Sea. – No evidence was found that prolific volcanism has affected the early opening of the Riiser-Larsen Sea. – The Lazarev Sea is a sediment-starved region.

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  1. Barker P.F., Kennett, J.P. et al. 1988, Proc. ODP Init. Reports. Ocean Drilling Program, Vol. 113, pp. 1–785. College Station, TX.

  2. Barker, P.F., Kennett, J.P. et al. 1990, Proc. ODP, Sci. Results, Vol. 113, College Station, TX, USA.

  3. H.W. Bergh (1987) ArticleTitleUnderlying fracture zone nature of Astrid Ridge of Antarctica’s Queen Maud Land J. Geophys. Res. 92 475–484

    Google Scholar 

  4. S.C. Cande J.L. LaBrecque W.F. Haxby (1988) ArticleTitlePlate kinematics of the South Atlantic: Chron C34 to present J. Geophys. Res. 93 13479–13492

    Google Scholar 

  5. Ciesielski, P.F., Kristoffersen Y. et al. 1988, Proc. ODP Init. Reports. Ocean Drilling Program, Vol. 114. College Station, TX.

  6. M.F. Coffin P.D. Rabinowitz (1987) ArticleTitleReconstruction of Madagascar and Africa: evidence from the Davie Fracture Zone and Western Somali Basin J. Geophys. Res. 92 9385–9406

    Google Scholar 

  7. Hayes, D.E., 1991, Marine geological and geophysical atlas: circum-Antarctic to 30°S – Antarctic Research Series, 54.

  8. K. Hinz W. Krause (1982) ArticleTitleThe continental margin off Queen Maud Land/Antarctica: Seismic sequences, structural elements and geological development Geol. Jb. E. 23 17–41

    Google Scholar 

  9. Jokat, W., Boebel, T., König, T. and Meyer, U., 2003, Timing and geometry of early Gondwana break-up, J. Geophys. Res. 108, 2428–??.

    Google Scholar 

  10. D.V. Kent F.M. Gradstein (1986) A Jurassic to Recent Chronology P.R. Vogt B. Tucholke (Eds) The Geology of North America, Vol M The Western North Atlantic Region Geological Society of America Boulder 45–50

    Google Scholar 

  11. Kristoffersen, Y. and LaBrecque, J. 1991, On the tectonic history and origin of the Northeast Georgia rise, in Ciesielski, P.F., Kristoffersen, Y. et al. (eds.), Proc. ODP, Sci. Results 114, 411–428.

  12. Lambrecht, A., 1993, Bearbeitung und Interpretation reflexionsseismischer Daten im Bereich des Astrid-Rückens/Fenno Deep, Diplomarbeit, Institut für Geophysik der TU Clausthal..

  13. K.M. Marks A.A. Tikku (2001) ArticleTitleCretaceous reconstructions of East Antarctica, Africa and Madagascar Earth Planet. Sci. Lett. 186 479–495 Occurrence Handle10.1016/S0012-821X(01)00262-X

    Article  Google Scholar 

  14. P.D. Rabinowitz M.F. Coffin D.A. Falvey (1983) ArticleTitleThe separation of Madagascar and Africa Science 220 67–69

    Google Scholar 

  15. Rao, D.G., Ramana, M.V. and Sarma, K.V.L.N.S., 1992, Tectonic development of graben over the Astrid Ridge off Dronning Maud Land, Antarctica, in Yoshida, A. Kaminuma, K. and Shiraishi, K. (eds.), Recent Progress in Antarctic Earth Science, pp. 639–647. Terra Scientific Publishing Company, Tokyo.

  16. Roeser, H.A., Bargeloh, H.O., Fritsch, J., Hinz, K., Kewitsch, P., Meyer, H., Schrader, U. and Schreckenberger, B., 1990, Geophysical investigations on the crustal structure off East Antarctica between longitudes 0° and 40°E: final report on the PFS Polarstern cruise ANT VIII/6, 14 March 1990-30 April 1990. BGR Report 106883, pp. 1–96.

  17. Roeser, H.A., Fritsch, J. and Hinz, K., 1996, The development of the crust off Dronning Maud Land, East Antarctica, in Storey, B.C., King, E.C., Livermore R.A. (eds.), Weddell Sea Tectonics and Gondwana Break-Up, Geol. Soc. Spec. Publ. 108, 243–264.

  18. J. Ségoufin (1987) ArticleTitleAnomalies magnetiques mesozoiques dans le bassin de Mozambique Comptes Rendus Hebdomadaires des Seances de L’academie des Sciences 287 109–112

    Google Scholar 

  19. H.N. Siddiquie D. Gopala Rao M.V. Ramana (1988) ArticleTitleGeology and structure of the Astrid Ridge, Dronning Maud Land, Antarctica Paleoceanography 3 583–599

    Google Scholar 

  20. E.S.W. Simpson R. Schlich (1974) Initial Reports of the Deep Sea Drilling Project 25 US Government Printing Office Washington

    Google Scholar 

  21. M.R.A. Thompson P.W.G. Tanner D.C. Rex (1982) Fossil and radiometric evidence for ages of deposition and metamorphism of sedimentary sequences on South Georgia C. Craddock (Eds) Antarctic Geoscience Univ. Wisconsin Press Madison, WI 177–184

    Google Scholar 

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Hinz, K., Neben, S., Gouseva, Y.B. et al. A Compilation of Geophysical Data from the Lazarev Sea and the Riiser-Larsen Sea, Antarctica. Mar Geophys Res 25, 233–245 (2004). https://doi.org/10.1007/s11001-005-1319-y

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  • Antarctica
  • continental margins
  • seismic reflection
  • volcanic structure