IODP expedition 331: Strong and expansive subseafloor hydrothermal activities in the Okinawa trough

Ken Takai, Michael J. Mottl, Simon H H Nielsen, J. L. Birrien, S. Bowden, L. Brandt, A. Breuker, J. C. Corona, S. Eckert, Hilairy Hartnett, S. P. Hollis, C. H. House, A. Ijiri, J. Ishibashi, Y. Masaki, S. McAllister, J. McManus, C. Moyer, M. Nishizawa, T. Noguchi & 5 others T. Nunoura, G. Southam, K. Yanagawa, S. Yang, C. Yeats

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Integrated Ocean Drilling Program (IODP) Expedition 331 drilled into the Iheya North hydrothermal system in the middle Okinawa Trough in order to investigate active subseafloor microbial ecosystems and their physical and chemical settings. We drilled five sites during Expedition 331 using special guide bases at three holes for reentry, casing, and capping, including installation of a steel mesh platform with valve controls for postcruise sampling of fluids. At Site C0016, drilling at the base of the North Big Chimney (NBC) mound yielded low recovery, but core included the first Kuroko-type black ore ever recovered from the modern subseafloor. The other four sites yielded interbedded hemipelagic and strongly pumiceous volcaniclastic sediment, along with volcanogenic breccias that are variably hydrothermally altered and mineralized. At most sites, analyses of interstitial water and headspace gas yielded complex patterns with depth and lateral distance of only a few meters. Documented processes included formation of brines and vapor-rich fluids by phase separation and segregation, uptake of Mg and Na by alteration minerals in exchange for Ca, leaching of K at high temperature and uptake at low temperature, anhydrite precipitation, potential microbial oxidation of organic matter and anaerobic oxidation of methane utilizing sulfate, and methanogenesis. Shipboard analyses have found evidence for microbial activity in sediments within the upper 10-30 m below seafloor (mbsf) where temperatures were relatively low, but little evidence in the deeper hydrothermally altered zones and hydrothermal fluid regime.

Original languageEnglish (US)
Pages (from-to)19-27
Number of pages9
JournalScientific Drilling
Issue number13
DOIs
StatePublished - Apr 2012

Fingerprint

Drilling
Fluids
Sediments
Brines
Oxidation
Chimneys
Reentry
Phase separation
Biological materials
Ecosystems
Temperature
Ores
Leaching
Methane
Minerals
Vapors
Sampling
Recovery
Steel
Gases

ASJC Scopus subject areas

  • Mechanical Engineering
  • Energy Engineering and Power Technology

Cite this

Takai, K., Mottl, M. J., Nielsen, S. H. H., Birrien, J. L., Bowden, S., Brandt, L., ... Yeats, C. (2012). IODP expedition 331: Strong and expansive subseafloor hydrothermal activities in the Okinawa trough. Scientific Drilling, (13), 19-27. https://doi.org/10.2204/iodp.sd.13.03.2011

IODP expedition 331 : Strong and expansive subseafloor hydrothermal activities in the Okinawa trough. / Takai, Ken; Mottl, Michael J.; Nielsen, Simon H H; Birrien, J. L.; Bowden, S.; Brandt, L.; Breuker, A.; Corona, J. C.; Eckert, S.; Hartnett, Hilairy; Hollis, S. P.; House, C. H.; Ijiri, A.; Ishibashi, J.; Masaki, Y.; McAllister, S.; McManus, J.; Moyer, C.; Nishizawa, M.; Noguchi, T.; Nunoura, T.; Southam, G.; Yanagawa, K.; Yang, S.; Yeats, C.

In: Scientific Drilling, No. 13, 04.2012, p. 19-27.

Research output: Contribution to journalArticle

Takai, K, Mottl, MJ, Nielsen, SHH, Birrien, JL, Bowden, S, Brandt, L, Breuker, A, Corona, JC, Eckert, S, Hartnett, H, Hollis, SP, House, CH, Ijiri, A, Ishibashi, J, Masaki, Y, McAllister, S, McManus, J, Moyer, C, Nishizawa, M, Noguchi, T, Nunoura, T, Southam, G, Yanagawa, K, Yang, S & Yeats, C 2012, 'IODP expedition 331: Strong and expansive subseafloor hydrothermal activities in the Okinawa trough' Scientific Drilling, no. 13, pp. 19-27. https://doi.org/10.2204/iodp.sd.13.03.2011
Takai, Ken ; Mottl, Michael J. ; Nielsen, Simon H H ; Birrien, J. L. ; Bowden, S. ; Brandt, L. ; Breuker, A. ; Corona, J. C. ; Eckert, S. ; Hartnett, Hilairy ; Hollis, S. P. ; House, C. H. ; Ijiri, A. ; Ishibashi, J. ; Masaki, Y. ; McAllister, S. ; McManus, J. ; Moyer, C. ; Nishizawa, M. ; Noguchi, T. ; Nunoura, T. ; Southam, G. ; Yanagawa, K. ; Yang, S. ; Yeats, C. / IODP expedition 331 : Strong and expansive subseafloor hydrothermal activities in the Okinawa trough. In: Scientific Drilling. 2012 ; No. 13. pp. 19-27.
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AU - Bowden, S.

AU - Brandt, L.

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AU - Eckert, S.

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AU - Hollis, S. P.

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AU - Ishibashi, J.

AU - Masaki, Y.

AU - McAllister, S.

AU - McManus, J.

AU - Moyer, C.

AU - Nishizawa, M.

AU - Noguchi, T.

AU - Nunoura, T.

AU - Southam, G.

AU - Yanagawa, K.

AU - Yang, S.

AU - Yeats, C.

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