Integrated Ocean Drilling Program Expedition 329 scientific prospectus; South Pacific gyre microbiology

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doi: 10.2204/iodp.sp.329.2010
Author(s): D'Hondt, Steven; Inagaki, Fumio; Alvarez Zarikian, Carlos
Author Affiliation(s): Primary:
University of Rhode Island, Graduate School of Oceanography, Narragansett, RI, United States
Japan Agency for Marine-Earth Science and Technology, Japan
Texas A&M University, United States
Source: Scientific Prospectus (Integrated Ocean Drilling Program), Vol.329, 116p. Publisher: IODP Management International, College Station, TX, United States. ISSN: 1932-9415
Note: In English. 77 refs.
Summary: Integrated Ocean Drilling Program Expedition 329 will core and log deep-sea sediment and basement at a series of sites in the South Pacific Gyre. The sites are characterized by different levels of marine productivity and different basement ages (from 6 to 84-124.6 Ma). The primary purposes of the expedition are to (1) document the nature of microbial communities and test the energetic limit to life in the most food poor deep-sea sediment and (2) test the influence of crust age and sediment thickness on microbial communities, availability of electron donors and acceptors, and the hydrologic evolution of crustal basalt. This project will address fundamental questions about the subseafloor biosphere: Are the communities in mid-gyre subseafloor sediments uniquely structured? Do they contain previously unknown kinds of organisms? Is their primary electron donor organic matter from the surface world or hydrogen from in situ radioactive splitting of water? Do their activities and composition vary with properties of the surface world, such as sea-surface chlorophyll concentrations or organic flux to the seafloor? Is microbial activity sustainable in subseafloor basalt by mineral oxidation (e.g., oxidation of iron in the basaltic minerals) or other processes for tens of millions of years after basalt formation? Are microbial communities recognizably present in subseafloor basalts older than 13 Ma?
Year of Publication: 2010
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Anaerobic environment; Basalts; Biochemistry; Biomass; Communities; Crust; Drilling; East Pacific; Ecology; Expedition 329; Expeditions; Geomicrobiology; Geophysical methods; Geophysical profiles; Geophysical surveys; Habitat; Igneous rocks; Integrated Ocean Drilling Program; Marine drilling; Marine sediments; Metabolism; Microorganisms; Oceanic crust; Pacific Ocean; Planning; Programs; Sediments; Seismic methods; Seismic profiles; South Pacific; Southeast Pacific; Surveys; Volcanic rocks
Coordinates: S455800 S235100 W1231000 W1653800
Record ID: 2010048007
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