+--------------------------------------------------------------------------+ | ATLANTIS CRUISE SYNOPSIS | +--------------------------------------------------------------------------+ Voyage - Leg: AT 03-23 Voyage Dates: 8 - 26 Jul 1998 Chief Sci(s): James Cowen Address: Dept. of Oceanography Univ. of Hawaii 1000 Pope Rd. Honolulu, HI 96822 Phone: 808-956-7124 Email: jcowen@soest.hawaii.edu Cruise Objective: LExEn Project Science Activities: The dive series is primarily in support of a LExEn project that seeks to evaluate the export of products of microbial activity within the seafloor crust near mid-ocean spreading centers. We are interested in both quantitative flux measurements of particulate and dissolved organic proxies of microbial activity as well as what these fluxes can tell us about the nature and magnitude of the subseafloor microbial communities. This project emphasizes the development of particle and dissolved organic carbon scavenging columns and bases designed to focus diffuse flow, exiting from the seafloor, through a 'filter cartridge-organic scavenging resin-thermisters-flow meter' assembly. These scavenging columns will be deployed using ALVIN for periods ranging from hours to days to one year. In addition water will be collected from all sites for various inorganic, organic and microbiological analyses. We will also carry out various geophysical studies including gravity and magnetometer measurements in part intended to evaluate such things as porosity which have critical relationship to fluid/rock ratios and potential crustal fluid velocities. The primary goal of our LExEn project is to test the hypothesis that there is a substantial microbial bio-sphere within the oceanic crust. A critical component of this study is to learn how this biosphere varies under different crustal-geothermal regimes, and how the organic-carbon evidence of the subsurface microbial activity is manifested at sites of widely different crustal age and sediment cover. Consequently, we will be diving at the following sites: ODP Hole 1026B and Baby Bare (crustal fluids escaping from 3 My old crust capped by thick sediment cover); Endeavour axis (young crust but with complex hydrothermal plumbing system in which fluids and entrained organics and other constituents could be derived from a variety of sources and environments; Axial Volcano (zero age crust, unsedimented). A secondary objective at Axial is to document the recent eruption thought to have occurred as a result of the January-February 1998 seismic event recorded at Axial by the T-Phase Monitoring Program (SOSUS). Fluid and rock samples will be sought, as well as deployment of our LExEn scavenging columns. Operations Area: ODP Hole 1026B and Baby Bare, Endeavour axis, Axial Volcano 47N 128W SSSG Tech: David Sims, sssg@atlantis.whoi.edu Departure Port: Astoria, Oregon Agent: Ship Service Company c/o Master, RV ATLANTIS Port of Astoria Foot of Portway Astoria, OR 97103 Tele: (503) 325-3721 Fax: (503) 325-4109 Lou Marconeri Arrival Port: Astoria, Oregon Agent: Ship Service Company c/o Master, RV ATLANTIS Port of Astoria Foot of Portway Astoria, OR 97103 Tele: (503) 325-3721 Fax: (503) 325-4109 Lou Marconeri Installed 12kHz echosounder w/recorder Scientific Wire line pinger Equipment: Deionized water system CTD/rosette system -70 freezer Fume hood 10 & 30-liter Niskins Refrigerators/freezers WHOI-Provided Tentative List: Science Tools: ALVIN externally-mounted magnetometer ALVIN high and low temperature probes (every dive) ALVIN hydraulic water pump ALVIN 2 and/or 5-liter Niskin water samplers Seacat CTD Program-Provided Tentative List (specs will follow): Science Tools: Bell gravimeter PMEL manifold sampler BioBox (for biological specimen collection) Temporary/transported equipment (specs will follow): Filter columns and bases to be deployed on sea floor for particle and dissolved organic material extraction, supplied by Cowen/Johnson. Titanium water samplers Cement (grout) dispensors Water pump sampler (possibly) Box corer HOBOs (Embley) Shipboard Standard navigation and communication Equipment/Nav: 2 nets/8 transponders Other Stow equipment on board for Lilley Fall '98 cruise Requirements: Notes: Japanese participant Refer to web site: [1]http://www.marine.whoi.edu/ships/alvin/alvin.htm for information re DSV ALVIN (incl. description, policies, procedures, sampling techniques, equipment, safety) Navy Clearance Granted 6/12/98: Status: WITHIN 10 NM RADIUS OF EACH OF THE FOLLOWING FOUR (4) SITES DURING PERIOD 080800T THRU 262000T JUL 98: 45-55N 129-57W 47-46N 127-46W 47-43N 127-47W 47-57N 129-06W Last Modified: 10/22/1998 Check List: Required? Comments US Customs Form No Explosives Clearance No Isotope Use Approval No Diplomatic Clearance No SCUBA Diving No References Visible links 1. http://www.marine.whoi.edu/ships/alvin/alvin.htm