georefid:2007-025139georefid:2007-025129SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.205.203.20062006-01-01publicationgeorefid:2007-025139doi:10.2973/odp.proc.sr.205.203.2006McKiernan, Alexander W.University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United StatesauthorSaffer, Demian M.Universitaet Bremen, Federal Republic of GermanyauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Morris, Julie D., Villinger, Heinrich W., Klaus, Adam, Cardace, Dawn M., Chavagnac, Valerie M. C., Clift, Peter D., Haeckel, Matthias, Hisamitsu, Toshio, Kastner, Miriam, Pfender, Marion, Saffer, Demian M., Santelli, Cara, Schramm, Burkhard, Screaton, Elizabeth J., Solomon, Evan A., Strasser, Michael, Moe, Kyaw Thu, Vannucchi, Paola, Proceedings of the Ocean Drilling Program; scientific results; fluid flow and subduction fluxes across the Costa Rica convergent margin; implications for the seismogenic zone and subduction factory; covering Leg 205 of the cruises of the Drilling Vessel JOIDES Resolution; Victoria, Canada, to Balboa, Panama; Sites 1253-1255; 2 September-6 November 2002205Vertical permeability and sediment consolidation measurements were taken on seven whole-round drill cores from Sites 1253 (three samples), 1254 (one sample), and 1255 (three samples) drilled during Ocean Drilling Program Leg 205 in the Middle America Trench off of Costa Rica's Pacific Coast. Consolidation behavior including slopes of elastic rebound and virgin compression curves (C (sub c) ) was measured by constant rate of strain tests. Permeabilities were determined from flowthrough experiments during stepped-load tests and by using coefficient of consolidation (C (sub v) ) values continuously while loading. Consolidation curves and the Casagrande method were used to determine maximum preconsolidation stress. Elastic slopes of consolidation curves ranged from 0.097 to 0.158 in pelagic sediments and 0.0075 to 0.018 in hemipelagic sediments. C (sub c) values ranged from 1.225 to 1.427 for pelagic carbonates and 0.504 to 0.826 for hemipelagic clay-rich sediments. In samples consolidated to an axial stress of approximately 20 MPa, permeabilities determined by flow-through experiments ranged from a low value of 7.66 X 10 (super -20) m (super 2) in hemipelagic sediments to a maximum value of 1.03 X 10 (super -16) m (super 2) in pelagic sediments. Permeabilities calculated from C (sub v) values in the hemipelagic sediments ranged from 4.81 X 10-16 to 7.66 X 10-20 m2 for porosities 49.9%-26.1%.completedEngineering geologyOceanographyCentral AmericacompressionconsolidationCosta RicaEast Pacificengineering propertiesexperimental studieslaboratory studiesLeg 205marine sedimentsmechanical propertiesMiddle America TrenchNorth PacificNortheast PacificOcean Drilling ProgramPacific Oceanpermeabilityphysical propertiespressuresedimentssoil mechanicsstrainstresssubduction zonesuniaxial testsurn:org.iodp:exp:205urnlargerWorkCitationcampaignEnglishgeoscientificInformation-86.1200-86.10009.38009.4000Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTMLapplication/pdfunknownSEDIS Publication Catalogue

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