georefid:2008-016929SEDIS 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.301.2004<gco:CharacterString>Integrated Ocean Drilling Program Expedition 301 preliminary report; Juan de Fuca hydrogeology; the hydrogeologic architecture of basaltic oceanic crust; compartmentalization, anisotropy, microbiology, and crustal-scale properties on the eastern flank of Juan de Fuca Ridge, eastern Pacific Ocean; 27 June-20 August 2004</gco:CharacterString>2004-01-01publicationgeorefid:2008-016929issn:1932-9423doi:10.2204/iodp.pr.301.2004Fisher, Andrew T.University of California-Santa Cruz, Earth Sciences Department, Santa Cruz, CA, United StatesauthorUrabe, TetsuroUniversity of Tokyo, JapanauthorKlaus, AdamIntegrated Ocean Drilling Program, United StatesauthorBartetzko, Anne C. M.Universitaet Bremen, Federal Republic of GermanyauthorBecker, KeirRosenstiel School of Marine and Atmospheric Science, United StatesauthorCoggon, RosalindUniversity of Southampton, United KingdomauthorDumont, MarionStockholm University, SwedenauthorEngelen, BertCarl von Ossietzky Universitaet Oldenburg, Federal Republic of GermanyauthorGoto, ShusakuKyoto University, JapanauthorHawkins, LisaWestern Washington University, United StatesauthorHeuer, VerenaSan Jose State University, United StatesauthorHulme, Samuel MarkJapan Agency of Marine-Earth Science and Technology, JapanauthorHutnak, MichaelLamont-Doherty Earth Observatory, United StatesauthorInagaki, FumioKyushu University, JapanauthorIturrino, Gerardo J.University of North Carolina at Chapel Hill, United StatesauthorKiyokawa, ShoichiOregon State University, United StatesauthorLever, Mark AlexanderUniversity of Ryukyus, JapanauthorNakagawa, SatoshiGreen Mountain Union High School, United StatesauthorNielsen, Mark EdwardKochi University, JapanauthorNoguchi, TakurohUniversity of Bergen, NorwayauthorRice, JonathanMonterey Bay Aquarium Research Institute, United StatesauthorSager, William W.authorSakaguchi, MasumiauthorSteinsbu, Bjorn OlavauthorTsuji, TakeshiauthorWheat, Charles GeoffreyauthorIODP Management International, College Station, TX, United StatespublisherdocumentDigitalPreliminary Report (Integrated Ocean Drilling Program)301121 pp.1932-9423Integrated Ocean Drilling Program Expedition 301 is the first part of a two-expedition, multidisciplinary program to evaluate the formation-scale hydrogeologic properties within oceanic crust; determine how fluid pathways are distributed within an active hydrothermal system; establish linkages between fluid circulation, alteration, and microbiological processes; and determine relations between seismic and hydrologic anisotropy. During Expedition 301, we replaced one existing borehole observatory penetrating the upper oceanic crust on the eastern flank of the Juan de Fuca Ridge and established two new observatories penetrating to depths as great as 583 meters below seafloor or 318 m into basement. We sampled sediments, basalt, fluids, and microbial samples; collected wireline logs; and conducted hydrogeologic tests in two basement holes. Shore-based studies will help us to learn where microbiological communities live in the crust and how these communities cycle carbon, alter rocks, and are influenced by fluid flow paths. During a follow-up expedition, we will conduct the first multidimensional, cross-hole experiments attempted in the oceanic crust, including linked hydrologic, microbiological, seismic, and tracer components. After completion of drillship operations, we will initiate multiyear tests using the new network of subseafloor observatories, allowing us to examine a much larger volume of the crustal aquifer system than has been tested previously. By monitoring, sampling, and testing within multiple depth intervals, we can evaluate the extent to which oceanic crust is connected vertically and horizontally; the influence of these connections on fluid, solute, heat, and microbiological processes; and the importance of scaling on hydrologic properties. This work is helping us to understand the nature of permeable pathways, the depth extent of circulation, the importance of permeability anisotropy, and the significance of hydrogeologic barriers in the crust.completedSolid-earth geophysicsApplied geophysicsbasaltsbasementboreholesC-14carboncontinental margincorescrustdrillingEast PacificExpedition 301flowsfluid phasegeochemistrygeomicrobiologygeophysical methodsgeophysical profilesgeophysical surveysground waterigneous rocksIntegrated Ocean Drilling ProgramIODP Site 1301isotopesJuan de Fuca RidgeLeg 168marine drillingmarine sedimentsmicroorganismsmid-ocean ridge basaltsNorth PacificNortheast PacificOcean Drilling Programoceanic crustODP Site 1026Pacific CoastPacific Oceanpore waterradioactive isotopessedimentsseismic methodsseismic profilesseismic stratigraphyslug testssurveystracersUnited Statesvolcanic rocksWashingtonwell logsurn:org.iodp:exp:301urnlargerWorkCitationcampaignurn:org.iodp:exp:168urnlargerWorkCitationcampaignurn:org.iodp:exp:301:site:U1301urnlargerWorkCitationstudyurn:org.iodp:exp:301urnlargerWorkCitationcampaignurn:org.iodp:exp:168:site:1026urnlargerWorkCitationstudyurn:org.iodp:exp:168urnlargerWorkCitationcampaignEnglishgeoscientificInformation-127.4600-127.452647.450047.4600application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://iodp.tamu.edu/publications/PR/301PR/301PR.PDFdownload