georefid:2007-106634SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1007/s11001-005-3136-8<gco:CharacterString>Late Pliocene mega debris flow deposit and related fluid escapes identified on the Antarctic Peninsula continental margin by seismic reflection data analysis</gco:CharacterString>2006-01-01publicationgeorefid:2007-106634doi:10.1007/s11001-005-3136-8Diviacco, P.Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Sgonico, ItalyauthorRebesco, M.Universitat de Barcelona, SpainauthorCamerlenghi, A.authorSpringer, Dordrecht, NetherlandspublisherdocumentHardcopyIn: Whitmarsh, R. B. (prefacer), Special issue in honour of Editor in Chief Jean-Claude Sibuet27 (2)109-128We have obtained improved images of a debris flow deposit through the reprocessing of multichannel seismic reflection data between Drifts 6 and 7 of the continental rise of the Pacific margin of the Antarctic Peninsula. The reprocessing, primarily aimed at the reduction of noise, relative to amplitude preservation, deconvolution, also included accurate velocity analyses. The deposit is dated as upper Pliocene (nearly 3.0 Ma) via correlation to Sites 1095 and 1096 of the Ocean Drilling Program (ODP) Leg 178. The estimated volume is about 1800 km (super 3) and the inferred provenance from the continental slope implies a run out distance exceeding 250 km. The dramatic mass-wasting event that produced this deposit, unique in the sedimentary history of this margin, is related to widespread late Pliocene margin erosion. This was associated with a catastrophic continental margin collapse, following the Antarctic ice sheet expansion in response to global cooling. (mod. journ. abst.)completedStratigraphyApplied geophysicsacoustical methodsAlexander ChannelAntarctic PeninsulaAntarcticabathymetrybottom featuresCenozoiccontinental margincorrelationdata processingdebris flowsdeconvolutiongeophysical methodsgeophysical profilesgeophysical surveysLeg 178marine sedimentsmass movementsmoundsNeogeneOcean Drilling Programocean floorsODP Site 1095ODP Site 1096Pliocenereflection methodssedimentsseismic methodsseismic profilesseismic stratigraphyslumpingsonar methodsSouthern OceansurveysTertiaryurn:org.iodp:exp:178urnlargerWorkCitationcampaignurn:org.iodp:exp:178:site:1095urnlargerWorkCitationstudyurn:org.iodp:exp:178urnlargerWorkCitationcampaignurn:org.iodp:exp:178:site:1096urnlargerWorkCitationstudyurn:org.iodp:exp:178urnlargerWorkCitationcampaignEnglishgeoscientificInformation-80.0000-74.0000-68.3000-66.0000