georefid:2007-035111georefid:2007-035088SEDIS 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.204.112.2006<gco:CharacterString>A test of the temperature, pressure, and conductivity tool prototype at Hydrate Ridge</gco:CharacterString>2005-01-01publicationgeorefid:2007-035111doi:10.2973/odp.proc.sr.204.112.2006Ussler, William, IIIMonterey Bay Aquarium Research Institute, Research and Development Division, Moss Landing, CA, United StatesauthorPaull, Charles K.Christian-Albrechts-Universitaet zu Kiel, Federal Republic of GermanyauthorMcGill, PaulJoint Oceanographic Institutions, United StatesauthorSchroeder, DerrylUniversity of Texas at Austin, United StatesauthorFerrell, DeanUniversity of Leicester, United KingdomauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Trehu, Anne M., Bohrmann, Gerhard, Torres, Marta E., Rack, Frank R., Bangs, Nathan L., Barr, Samantha R., Borowski, Walter S., Claypool, George E., Collett, Timothy S., Delwiche, Mark E., Dickens, Gerald R., Goldberg, David S., Gracia, Eulalia, Guerin, Gilles, Holland, Melanie, Johnson, Joel E., Lee, Young-Joo, Liu, Char-Shine, Long, Philip E., Milkov, Alexei V., Riedel, Michael, Schultheiss, Peter, Su Xin, Teichert, Barbara, Tomaru, Hitoshi, Vanneste, Maarten, Watanabe, Mahito, Weinberger, Jill L., Boetius, Antje, Brockman, Fred J., Deyhle, Annette, Fehn, Udo, Flemings, Peter B., Girguis, Peter R., Heesemann, Martin, Joye, Samantha B., Lorenson, Thomas D., Mills, Christopher T., Musgrave, Robert J., Popa, Radu, Ussler, Bill, Wilkes, Heinz, Winckler, Gisela, Winters, William J., Proceedings of the Ocean Drilling Program; scientific results; drilling gas hydrates on Hydrate Ridge, Cascadia continental margin; covering Leg 204 of the cruises of the drilling vessel JOIDES Resolution; Victoria, British Columbia, Canada, to Victoria, British Columbia, Canada; Sites 1244-1252; 7 July-2 September 2002204A prototype tool to continuously monitor temperature, pressure, and conductivity (TPC) changes during Ocean Drilling Program (ODP) coring was used successfully 107 times at Hydrate Ridge during Leg 204. TPC sensors are located on the face of the standard ODP advanced piston corer piston, and the data logging electronics and batteries are embedded within the piston. This tool operates autonomously and requires little shipboard attention. The objective is to measure the temperature and pressure changes that occur in gas-rich and gas hydrate-bearing cores during collection and ascent to the surface and to use these data to learn about the processes that occur inside a core during recovery. Gas exsolution and expansion during core recovery alter both the temperature and pressure conditions within the core barrel, and the amount of gas in the core affects where these changes occur. The core collection process dramatically affects pressure inside the core barrel, which reduces core temperature and changes gas saturation conditions. Families of temperature-time curves generated from TPC data show distinct cooling anomalies associated with core pullout and with movement of the core through the shallow water column and on the deck of the drillship. Here the performance of the TPC tool and the response of the tool at sites with significant quantities of sediment gas and gas hydrate near the seafloor are described.completedOceanographyApplied geophysicsanomaliesCascadia subduction zoneconductivitycoresEast Pacificgas hydratesHydrate RidgeinstrumentsLeg 204marine sedimentsmeasurementNorth PacificNortheast PacificOcean Drilling Programocean floorsPacific Oceanpressuresedimentstemperaturewell-loggingurn:org.iodp:exp:204urnlargerWorkCitationcampaignEnglishgeoscientificInformation-125.0900-125.040044.340044.3500Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendicesapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/204_SR/VOLUME/CHAPTERS/112.PDFdownload