Quaternary seismic facies of the Atlantic continental rise

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doi: 10.1134/S0024490212050069
Author(s): Murdmaa, I. O.; Levchenko, O. V.; Marinova, J. G.
Author Affiliation(s): Primary:
Russian Academy of Sciences, P. Shirshov Institute of Oceanology, Moscow, Russian Federation
Volume Title: Lithology and Mineral Resources
Source: Lithology and Mineral Resources, 47(5), p.379-400. Publisher: MAIK Nauka/Interperiodica Publishing, Birmingham, AL, United States. ISSN: 0024-4902 CODEN: LTMRAR
Note: In English. 14 refs.; illus., incl. sketch map
Summary: High-resolution seismic profiles collected by Parasound and SES-2000 deep profilers during Cruise 26 of the R/V Akademik Sergei Vavilov (2009) along the continental slope base of South America, NW Africa, and West Europe are correlated with the deep-sea drilling boreholes. Lithofacies interpretation of the Quaternary deep-water seismic facies of hemipelagites, bottom current deposits (contourites), and gravitites (turbidites, mud flow deposits) is presented. The data obtained reveal the domination of contourites in the accumulation of continental rise apron under conditions of relatively scarce terrigenous material supply. It is shown that acoustically stratified seismic facies under these conditions commonly reflect interbedding of the terrigenous clay and biogenic calcareous ooze related to the Pleistocene glacial/interglacial cycles. Copyright 2012 Pleiades Publishing, Ltd.
Year of Publication: 2012
Research Program: DSDP Deep Sea Drilling Project
Key Words: 20 Geophysics, Applied; 24 Surficial Geology, Quaternary Geology; Acoustical methods; Acoustical profiles; Africa; Atlantic Ocean; Boreholes; Calcareous composition; Cenozoic; Clastic sediments; Clay; Continental rise; Continental slope; Currents; Deep Sea Drilling Project; Europe; Geophysical methods; Geophysical profiles; Geophysical surveys; Glacial sedimentation; Interglacial environment; Lithofacies; Marine methods; Mass movements; Mudflows; Ocean currents; Ocean floors; Pleistocene; Quaternary; Research vessels; Sedimentation; Sediments; Seismic methods; Seismic profiles; Seismic stratigraphy; South America; Surveys; Terrigenous materials; Turbidite; West Africa; Western Europe
Record ID: 2017030930
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by Springer Verlag, Berlin, Federal Republic of Germany

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