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doi:10.2204/iodp.proc.314315316.209.2013

Data report: carbon isotope compositions of methane in void gas samples from IODP Expedition 315 Site C0001, Nankai Trough, offshore Japan¹

Hiroyuki Saito,^{2, 3} Noriyuki Suzuki,² and Urumu Tsunogai^{2, 4}

Abstract

We investigated carbon isotope compositions of methane and molecular compositions in void gas samples from Integrated Ocean Drilling Program Expedition 315 Site C0001. Methane is the predominant gas with traces of ethane and no heavier hydrocarbons detected. The methane/ethane (C₁/C₂) ratios of all samples are higher than 5500. The δ¹³C values of methane range from –74.9‰ to –73.9‰. These data indicate that methane found in Hole C0001F is predominantly of microbial origin.

¹ Saito, H., Suzuki, N., and Tsunogai, U., 2013. Data report: carbon isotope compositions of methane in void gas samples from IODP Expedition 315 Site C0001, Nankai Trough, offshore Japan. In Kinoshita, M., Tobin, H., Ashi, J., Kimura, G., Lallemant, S., Screaton, E.J., Curewitz, D., Masago, H., Moe, K.T., and the Expedition 314/315/316 Scientists, Proc. IODP, 314/315/316: Washington, DC (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.314315316.209.2013

² Department of Natural History Sciences, Faculty of Science, Hokkaido University, N10W8 Kita-ku, Sapporo 060-0810, Japan.

³ Present address: Research Division of JAPEX Earth Energy Frontier, Creative Research Institution, Hokkaido University, N21W10 Kita-ku, Sapporo 001-0021, Japan. hsaito@cris.hokudai.ac.jp

⁴ Present address: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.

Initial receipt: 18 October 2010
Acceptance: 26 February 2013
Publication: 2 May 2013
MS 314315316-209

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