Ussler, William, III; Paull, Charles K.; McGill, Paul; Schroeder, Derryl; Ferrell, Dean (2005): A test of the temperature, pressure, and conductivity tool prototype at Hydrate Ridge. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: 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 2002, 204, georefid:2007-035111

Abstract:
A 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.
Coverage:
West: -125.0900 East: -125.0400 North: 44.3500 South: 44.3400
Relations:
Expedition: 204
Supplemental Information:
Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendices
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.204.112.2006 (c.f. for more detailed metadata)
Data download: application/pdf
This metadata in ISO19139 XML format