georefid:2008-016936SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2204/iodp.pr.308.2005<gco:CharacterString>Integrated Ocean Drilling Program Expedition 308 preliminary report; Gulf of Mexico hydrogeology; overpressure and fluid flow processes in the deepwater Gulf of Mexico; slope stability, seeps, and shallow-water flow</gco:CharacterString>2005-01-01publicationgeorefid:2008-016936issn:1932-9423doi:10.2204/iodp.pr.308.2005Flemings, Peter B.Pennsylvania State University, Department of Geosciences, University Park, PA, United StatesauthorBehrmann, Jan H.Albert-Ludwigs-Universitaet Freiburg, Federal Republic of GermanyauthorJohn, Cedric M.University of California-Santa Cruz, United StatesauthorIturrino, Gerardo J.Lamont-Doherty Earth Observatory, United StatesauthorAizawa, YasutakaKyoto University, JapanauthorNguyen Thi Thanh BinhUniversity of Tokyo, Japanauthorde Silva, NeilRice University, United StatesauthorDugan, BrandonLulea University of Technology, SwedenauthorEdeskar, Tommy M.Universitaet Bremen, Federal Republic of GermanyauthorFranke, ChristineSouthampton Oceanography Centre, United KingdomauthorGay, AurelienUniversity of Virginia, United StatesauthorGilhooly, William Patrick, IIIUniversidad de Granada, SpainauthorGutierrez-Pastor, JuliaNanjing University, ChinaauthorJiang Shao-YongTongji University, ChinaauthorLi QianyuJapan Agency for Marine-Earth Science and Technology, JapanauthorLong, HuiShell International Exploration and Production, United StatesauthorMoore, J. CaseyUniversity of Leicester, United KingdomauthorNunoura, TakuroFlorida State University, United StatesauthorPirmez, CarlosUniversity of Tsukuba, JapanauthorReichow, MarcHokkaido University, JapanauthorSawyer, Derek E.Universidad de Barcelona, SpainauthorSchneider, JuliaShizuoka University, JapanauthorShumnyk, Anatoliy V.Vrije Universiteit, NetherlandsauthorSuzuki, TakahiroauthorTakano, YoshinoriauthorUrgeles, RogerauthorYamamoto, YuzuruauthorZampetti, ValentinaauthorIODP Management International, College Station, TX, United StatespublisherdocumentDigitalPreliminary Report (Integrated Ocean Drilling Program)3081098 pp.1932-9423Integrated Ocean Drilling Program (IODP) Expedition 308 is the first part of a two-component program dedicated to the study of overpressure and fluid flow on the Gulf of Mexico continental slope. We are examining how sedimentation, overpressure, fluid flow, and deformation are coupled in passive margin settings. Expedition 308 tested a multidimensional flow model by examining how physical properties, pressure, temperature, and pore fluid composition vary within low-permeability mudstones that overlie a permeable and overpressured aquifer. We drilled, logged, and made in situ measurements in a reference location where little overpressure was deemed to be present: the Brazos-Trinity Basin. We contrasted these measurements with experiments performed in a region of very rapid Pleistocene sedimentation where overpressure is known to be present: the Ursa region of the northern Gulf of Mexico. Drilling documented severe overpressure in the Ursa region. Postcruise studies will illuminate controls on slope stability, seafloor seeps, and large-scale crustal fluid flow. Two key components of the experimental plan were to take substantial whole-core geotechnical samples for later shore-based analysis and to deploy the temperature and dual pressure probe (developed jointly between the Massachusetts Institute of Technology, Pennsylvania State University, and IODP at Texas A&M University) to measure in situ pressure. Expedition 308 science met many of the objectives proposed in the original IODP Proposal 589-Full3 and provided the foundation to implement long-term in situ monitoring experiments in the aquifer and bounding mudstones in a future expedition designed to meet the full objectives of IODP Proposal 589-Full3. An important achievement of Expedition 308 is to have successfully recorded in situ formation pressure and temperature in an overpressured basin. This is the first time that we know of that such measurements have been obtained.completedOceanographyApplied geophysicsAtlantic OceanbiostratigraphyboreholesBrazos-Trinity BasinCenozoicchronostratigraphycontinental slopecorescorrelationcurrentsdrillingExpedition 308flowsfluid phasefluid pressuregeochemistrygeophysical methodsgeophysical profilesgeophysical surveysground waterGulf of MexicohydrochemistryhydrodynamicsIntegrated Ocean Drilling ProgramIODP Site 1319IODP Site 1320IODP Site 1321IODP Site 1322IODP Site 1323IODP Site 1324lithofacieslithostratigraphyLouisianamarine drillingmarine sedimentationmarine sedimentsmass movementsmicrofossilsNorth Atlanticnorthern Gulf of Mexicooverpressurepermeabilitypore pressurepore waterporosityQuaternarysea-level changessedimentationsedimentsseismic methodsseismic profilesseismic stratigraphyslope stabilityslumpingsubmarine fanssurveysTexasturbiditeturbidity currentsUnited Statesupper QuaternaryUrsa Basinwell logsurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1319urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1320urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1321urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1322urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1323urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignurn:org.iodp:exp:308:site:U1324urnlargerWorkCitationstudyurn:org.iodp:exp:308urnlargerWorkCitationcampaignEnglishgeoscientificInformation-94.2500-89.000027.150028.0600application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://publications.iodp.org/preliminary_report/308/308PR.PDFdownload