{"refrec":{"BRefID":241212,"RR":"<b>Hanebuth, T.J.J.; Hofmann, A.L.; Lenhart, A.; Löwemark, L.A.; Schwenk, T.; Zhang, W.</b> (2014). Short-term sediment dynamics on a contourite body (off NW Iberia), Part I: Rapid changes of bottom-flow intensity during the past 50ka deduced from a sediment-core transect, <b><i>in</i></b>: Van Rooij, D. <i>et al.</i> (Ed.) <i>Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication,</i> 69: pp. 33-34","BEntID":232909,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":", <b><i>in</i></b>: Van Rooij, D. <i>et al.</i> <i>Book of Abstracts. 2nd Deep-Water Circulation Congress: The Contourite Log-book. Ghent, Belgium, 10-12 September 2014. VLIZ Special Publication,</i> 69: pp. 33-34","DocTypID":17,"DocType":"Book chapters","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Hanebuth, T.J.J.; Hofmann, A.L.; Lenhart, A.; Löwemark, L.A.; Schwenk, T.; Zhang, W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Hanebuth, T.J.J. <i>et al.</i>","Englishabstract":"The sediment dynamics in a confined contourite system off NW Spain are reconstructed using high-res bathymetric mapping, seismic profiling, and sediment core transect. This depocenter and its 150m deep moat surround an 800m high obstacle. Since mid-Eocene, a pre-drift unit and two currentcontrolled contouritic units have formed. Fine-grained (10µm) basinwide current-influenced deposition was episodically interrupted by short-lasting high-energy conditions during MIS-3. High glacial and later Holocene periods show markedly calm conditions. The deglacial/early Holocene interval shows, in contrast, a pronounced increase in bottom-flow energy (70µm) with a waxing-and-waning dynamic from 17 to 5 cal ka BP. Process-based simulation demonstrates that not a water-mass core or boundary distributed those sands. Instead, pulse-like hydrographic fronts travelling inside the mixing zone of two water masses led to sand mobilization. Compared to paleoceanographic reconstructions, the downward-upward migrating MOW/LSW mixing zone is suggested as driving mechanism. A conceptional model shows how seafloor  obstacles redirect and perturbate bottom flows with the special effect of oceanographic-front pulses occurring in the mixing zone. Front-driven secondary eddies on the contourite body itself provide an efficient mechanism for widespread sediment re-distribution.","AbstractOtherLang":null,"BibLvlCode":"AMS","StandardTitle":"Short-term sediment dynamics on a contourite body (off NW Iberia), Part I: Rapid changes of bottom-flow intensity during the past 50ka deduced from a sediment-core transect","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Ocean bottom currents; Current-obstacle interaction; Eastern Atlantic; Late Quaternary","OtherDescriptors":null,"Notes":null,"AnaPub":2014,"MonPub":null,"DateUpdate":"2014-09-08","DateCreate":"2014-09-08","SecASFANote":null,"ConfID":null,"PeerRev":null,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":241212,"PubliDate":2014,"Pagination":"33-34","XtraPublOfAnaID":null,"ISBN":null,"Volume":"69","Issue":null,"BRefMon":241126,"BRefMonRR":"<b>Van Rooij, D.; Rüggeberg, A. 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