+--------------------------------------------------------------------------+ | ATLANTIS CRUISE SYNOPSIS | +--------------------------------------------------------------------------+ Voyage - Leg: AT 15-43 Voyage Dates: 08 Feb - 16 Feb 2009 Chief Scientist(s): Geoff Wheat Address: University of Alaska Fairbanks PO Box 475 Moss Landing, CA 95039 Phone: 831-633-7033 Email: wheat@mbari.org Cruise Objective: During Leg 205 of the Ocean Drilling Program (ODP) two boreholes were drilled into active hydrologic formations on the Costa Rica margin west of the Nicoya Peninsula. One borehole penetrated through the overriding plate into the d*collement at ODP Site 1255. The other borehole penetrated through the subducting sediment section and plate into permeable igneous basement at ODP Site 1253. These two boreholes were sealed and instrumented with a borehole observatory (CORK), allowing pressure, temperature, fluid flow velocity, and fluid chemical composition to be measured within the formation. The 1.5-yr pressure and two-year temperature, fluid velocity, and fluid chemical composition records collected to date have provided a basic knowledge of formation properties, although fluids within the boreholes had yet to reach "steady state" with the surrounding formations. The data also provide evidence that tectonic forcing related to subduction results in measurable transients in pressure, temperature, fluid velocity, and fluid composition within the d*collement. While the initial data provide a baseline for approaching several important scientific and technical questions, they have raised new key questions that will be addressed from additional continuous borehole data. We propose a 6-day submersible or ROV operation to retrieve instruments and stored data that will provide a continuous record of formation temperature, pressure, fluid flow rate, and chemical composition for an additional five years, from the time of the last visit in 2004 to 2009. This modest effort will result in an extremely valuable long-term synchronous record of hydrologic, geochemical, and geodynamic activity at this subduction zone, and establish a technical and scientific foundation for future borehole studies in a broad range of tectonically and hydrologically active settings. Science Activities: 6 science dives, 1 eng dive Operations Area: Costa Rica 9*38.8583*N 86*11.4337*W 4380 m Departure Port: Puntarenas, Costa Rica Agent: Master R/V Ship Name Attn: Scientist's Name IN TRANSIT c/o Vasile Tudoran Transport 819 Ohio Ave. Long Beach, CA 90804 Contact: Vasile Tudoran Phone: (562) 882-5590 Fax: (562) 434-9800 Email: [1]vtudoran@aol.com Local Address for Large Shipments: SERMAR SA Aptdo 76 Puntarenas, Costa Rica Attn: Manuel Fernandez Phone: 011-506-661-1529 Fax: 011-506-661-2779 Note: Agent and WHOI contacts should be copied on all communications. It is requested that shipment information of any equipment be communicated to the Agent and WHOI contacts Arrival Port: Puntarenas Costa Rica Agent: SHIP Installed or Normally Relay transponder for wire use Carried Equipment: CTD/Rossette 24x10L with Oxygen, T, S, Transmission, Fluorescence Refrigerator -70 deg freezer Walk-in cooler Deionized water system Fume hood Ultra-short baseline (USBL) navigation WHOI-Provided Equipment: Science Party-Provided Plasma Winch OSMO winch with weak link in line Equipment: need power connections Notes: nighttime work anticipated two string recoveries Science gear will be left on board until ship arrives in San Diego ALVIN/JASON Installed or Normally Major water samplers Carried Equipment: Push corers Low temperature probe Hear flow probe Digital Still Camera (fwd) Search Sonar Portable CTD Niskins: five 1.2L LBL- one transponder net Science Party-Provided Wellhead download equipment Equipment: sci party will bring floatation for instrument strings Pressure download equipment from Earl Davis Pre-checked computers from Earl Davis They may also go to SITE 1043 Notes: Other Notes: We have baking soda for any acid spill and all MSDS sheets, flamable gasses SSSG Tech: sssg @atlantis.whoi.edu Navy Clearance Granted 01/24/09: Status: WITHIN 5 NM RADIUS OF 09-39N 086-11W DURING PERIOD 080700Z THRU 160700Z FEB 09 Check List: Required? Comments US Customs Form Yes Diplomatic Clearance Yes Costa Rica has been approved Isotope Use Approval No SCUBA Diving No Last Modified: 02/13/2009 References Visible links 1. mailto:vtudoran@aol.com