georefid:2007-025137georefid:2007-025129SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.205.213.2006<gco:CharacterString>Habitability of subseafloor sediments at the Costa Rica convergent margin</gco:CharacterString>2006-01-01publicationgeorefid:2007-025137doi:10.2973/odp.proc.sr.205.213.2006Cardace, Dawn M.Washington University, Department of Earth and Planetary Sciences, Saint Louis, MO, United StatesauthorMorris, Julie D.Universitaet Bremen, Federal Republic of GermanyauthorPeacock, A. D.Texas A&M University, United StatesauthorWhite, D. C.Southampton Oceanography Centre, United KingdomauthorTexas 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 2002205Assessing the habitability of deep-sea sediments undergoing compaction, compression, and subduction at convergent margins adds to our understanding of the limits of the terrestrial biosphere. In this work, we report exploratory biomarker data on sediments obtained at Ocean Drilling Program (ODP) Sites 1253, 1254, and 1255 during drilling at the Costa Rica subduction trench and forearc sedimentary wedge. The samples selected for postcruise biomarker analyses were located within intervals of potentially enhanced fluid flow within the decollement and sedimentary wedge fault zones (Sites 1254 and 1255) and within basal carbonates at the reference site (Site 1253). The passage of fluids that are geochemically distinct from ambient interstitial water provides a disequilibrium setting that may enhance habitability. Biomarker data show low levels of microbial biomass in subseafloor sediments sampled at the Costa Rica convergent margin as deep as approximately 370 meters below seafloor.completedOceanographybiomarkersbiomassCentral AmericaCosta Ricadeep-sea environmentEast Pacificecologyfault zonesfaultshabitatLeg 205marine environmentmarine sedimentsmicroorganismsMiddle America TrenchNorth PacificNortheast PacificOcean Drilling ProgramPacific Oceanplate boundariesplate tectonicssedimentssubmarine environmenturn:org.iodp:exp:205urnlargerWorkCitationcampaignEnglishgeoscientificInformation-86.1200-86.10009.38009.4000Available only on CD-ROM in PDF format and on the Web in PDF or HTMLapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/205_SR/VOLUME/CHAPTERS/213.PDFdownload