HR: 1340h
AN: B13A-0191    [Abstracts]
TI: Plume mapping and shipboard chemical data used to locate new vent sites in the Lau Basin
AU: * Edmonds, H N
EM: edmonds@utmsi.utexas.edu
AF: University of Texas Marine Science Institute, 750 Channel View Dr., Port Aransas, TX 78373 United States
AU: German, C R
EM: cge@soc.soton.ac.uk
AF: Southampton Oceanography Centre, European Way, Southampton, SO14 3ZH United Kingdom
AU: Breier, J A
EM: jbreier@utmsi.utexas.edu
AF: University of Texas Marine Science Institute, 750 Channel View Dr., Port Aransas, TX 78373 United States
AU: Connelly, D P
EM: dpc@soc.soton.ac.uk
AF: Southampton Oceanography Centre, European Way, Southampton, SO14 3ZH United Kingdom
AU: Townsend-Small, A
EM: amy@utmsi.utexas.edu
AF: University of Texas Marine Science Institute, 750 Channel View Dr., Port Aransas, TX 78373 United States
AU: Resing, J A
EM: Joseph.Resing@noaa.gov
AF: NOAA, Pacific Marine Environmental Laboratory, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Aumack, C
EM: aumack@utmsi.utexas.edu
AF: University of Texas Marine Science Institute, 750 Channel View Dr., Port Aransas, TX 78373 United States
AU: Baker, E T
EM: edward.baker@noaa.gov
AF: NOAA, Pacific Marine Environmental Laboratory, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Langmuir, C H
EM: langmuir@eps.harvard.edu
AF: Harvard University, Dept. of Earth & Planetary Sciences, 20 Oxford Street, Cambridge, MA 02138 United States
AB: A central goal of the second Ridge2000 cruise (September-October 2004) to the Lau backarc basin in the southwest Pacific is to locate, map, and image new vent sites on the East Lau Spreading Center and the northern portion of the Valu Fa Ridge. Our primary tool for plume mapping and vent location is the Autonomous Benthic Explorer (ABE), including novel in situ chemical sensors (see abstracts by Yoerger et al. and German et al. in this session). In addition, we are using MAPRs (Miniature Autonomous Plume Recorders) to measure profiles of temperature and optical backscatter on dredge and rock core lowerings, and shipboard analysis of methane, hydrogen, pH, iron, and manganese from CTD casts, to locate and characterize the plumes. This presentation will focus on the profile data and chemical analyses, which we use to provide a preliminary comparison of chemical characteristics between vent fields.
DE: 8135 Hydrothermal systems (8424)
DE: 4832 Hydrothermal systems
DE: 4875 Trace elements
DE: 3035 Midocean ridge processes
DE: 1050 Marine geochemistry (4835, 4850)
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting