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Data report: 87Sr/86Sr in pore fluids off Shimokita, Japan1

Noelle Moen,2 Wei-Li Hong,2,3 and Brian Haley2


We report the strontium isotope ratios (87Sr/86Sr) from pore water collected during Integrated Ocean Drilling Program Expedition 337 off Shimokita peninsula, Japan. We use the ratios to track the origin of pore water between 1289 to 2405 meters below seafloor at Site C0020. Strontium isotope ratios measured from the samples collected by conventional sediment squeezer and the Quicksilver probe are in good agreement and suggest the success of the latter sampling technique. The 87Sr/86Sr ratios in the pore water range from 0.7086 to 0.7061, suggesting the mixing between ancient seawater and fluids derived from volcanic material alteration, a process also confirmed by onboard smear slide observations.

1 Moen, N., Hong, W.-L., and Haley, B., 2015. Data report: 87Sr/86Sr in pore fluids off Shimokita, Japan. In Inagaki, F., Hinrichs, K.-U., Kubo, Y., and the Expedition 337 Scientists, Proceedings of the Integrated Ocean Drilling Program, 337: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.337.201.2015

2 College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis OR 97331, USA. Correspondence author:

3 Present address: CAGE-Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geology, UiT The Arctic University of Norway, Tromsø, Norway.

Initial receipt: 14 January 2015
Acceptance: 18 August 2015
Publication: 3 November 2015
MS 337-201