HR: 0800h
AN: V51C-1495    [Abstracts]
TI: Plume-Vent Fluid Connections along the Tonga-Kermadec arc
AU: * Massoth, G J
EM: g.massoth@gns.cri.nz
AF: GNS, PO Box 31-312, Lower Hutt, 04 New Zealand
AU: Arculus, R J
EM: r.arculus@geology.anu..edu.au
AF: Australian National University, Dept. of Earth and Marine Sciences, Canberra, ACT 0200 Australia
AU: Baker, E T
EM: edward.baker@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Butterfield, D A
EM: david.a.butterfield@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Chadwick, W W
EM: bill.chadwick@noaa.gov
AF: NOAA/PMEL, 2115 Marine Science Drive, Newport, OR 97365-5258 United States
AU: Christenson, B W
EM: b.christenson@gns.cri.nz
AF: GNS, PO Box 31-312, Lower Hutt, 04 New Zealand
AU: de Ronde, C E
EM: cornel.deronde@gns.cri.nz
AF: GNS, PO Box 31-312, Lower Hutt, 04 New Zealand
AU: Embley, R W
EM: robert.w.embley@noaa.gov
AF: NOAA/PMEL, 2115 Marine Science Drive, Newport, OR 97365-5258 United States
AU: Evans, L J
EM: leigh.j.evans@noaa.gov
AF: NOAA/PMEL, 2115 Marine Science Drive, Newport, OR 97365-5258 United States
AU: Faure, K
EM: k.faure@gns.cri.nz
AF: GNS, PO Box 31-312, Lower Hutt, 04 New Zealand
AU: Graham, I J
EM: i.graham@gns.cri.nz
AF: GNS, PO Box 31-312, Lower Hutt, 04 New Zealand
AU: Greene, R R
EM: ronald.r.greene@noaa.gov
AF: NOAA/PMEL, 2115 Marine Science Drive, Newport, OR 97365-5258 United States
AU: Ishibashi, J
EM: ishi@geo.kyushu-u.ac.jp
AF: Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka, 812-8581 Japan
AU: Lebon, G T
EM: geoffrey.t.lebon@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Lupton, J E
EM: john.e.lupton@noaa.gov
AF: NOAA/PMEL, 2115 Marine Science Drive, Newport, OR 97365-5258 United States
AU: Resing, J A
EM: joseph.resing@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Roe, K K
EM: kevin.roe@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Schmidt, M
EM: mas@gpi.uni-kiel.de
AF: Universitaet Kiel, Olshausenstr. 40, Kiel, 24098 Germany
AU: Stoffers, P
EM: pst@gpi.uni-kiel.de
AF: Universitaet Kiel, Olshausenstr. 40, Kiel, 24098 Germany
AU: Walker, S L
EM: sharon.l.walker@noaa.gov
AF: NOAA/PMEL, 7600 Sand Point Way NE, Seattle, WA 98115-6349 United States
AU: Worthington, T J
EM: tw@gpi.uni-kiel.de
AF: Universitaet Kiel, Olshausenstr. 40, Kiel, 24098 Germany
AU: Wright, I C
EM: i.wright@niwa.co.nz
AF: NIWA, PO Box 14-901, Wellington, 04 New Zealand
AU: Yamanaka, T
EM: tyama@rc.kyushu-u.ac.jp
AF: Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka, 812-8581 Japan
AB: The full extent of the 2530 km-long Tonga-Kermadec intra-oceanic arc was systematically surveyed for hydrothermal plume emissions during 5 expeditions between 1999 and 2005: NZAPLUME I, II and III covered the Kermadec arc using the New Zealand RV TANGAROA and the TELVE and NoToVE cruises surveyed the Tonga arc aboard the Australian RV SOUTHERN SURVEYOR after preliminary swath mapping by the German RV SONNE. At least 71 volcanic centers comprise the arc front, with about 75% of these first mapped or newly discovered during the expeditions. Hydrothermal plumes were detected as light scattering and chemical anomalies over more than half (36) of the volcanoes surveyed. Forty submersible dives were made on one-third (12) of the hydrothermally active volcanoes during the past year: 4 inaugural dives by the Japanese submersible SHINKAI 6500 on Brothers volcano, and 36 dives using the NOAA/HURL submersibles PISCES IV and V on Brothers and an additional 11 volcanoes spread along the arc front. At least 25 venting sites were observed, and most were sampled for gaseous and liquid hydrothermal fluid emanations. We will summarize the pre-dive plume detection results with emphasis on the variability in the magnitude and character of the chemical signals over the active sites and compare/test predictions of the nature of seafloor sources at dive sites with what was actually observed. While most chemical determinations for the seafloor samples are pending, analyses conducted shipboard confirm that simple extension of plume results to the seafloor can be misleading and in contrast to the MOR experience.
DE: 0450 Hydrothermal systems (1034, 3017, 3616, 4832, 8135, 8424)
DE: 1034 Hydrothermal systems (0450, 3017, 3616, 4832, 8135, 8424)
DE: 4832 Hydrothermal systems (0450, 1034, 3017, 3616, 8135, 8424)
DE: 8424 Hydrothermal systems (0450, 1034, 3017, 3616, 4832, 8135)
DE: 8430 Volcanic gases
SC: Volcanology, Geochemistry, Petrology [V]
MN: Fall Meeting 2005