Biogeosciences

FTIR microspectroscopy of carbonaceous matter in ~ 3.5 Ga seafloor hydrothermal deposits in the North Pole area, Western Australia

Igisu M, Ueno Y, Takai K

Cool, alkaline serpentinite formation fluid regime with scarce microbial habitability and possible abiotic synthesis beneath the South Chamorro Seamount

Kawagucci S, Miyazaki J, Morono Y, Seewald JS, Wheat CG, Takai K

Paleoceanographic history of the Japan Sea over the last 9.5 million years inferred from radiolarian assemblages (IODP Expedition 346 Sites U1425 and U1430)

Matsuzaki KM, Itaki T, Tada R, Kamikuri S

Using molluscan assemblages from paleotsunami deposits to evaluate the influence of topography on the magnitude of late Holocene mega-tsunamis on Ishigaki Island, Japan

Kitamura A, Ito M, Ikuta R, Ikeda M

Weak hydrothermal carbonation of the Ongeluk volcanics: evidence for low CO2 concentrations in seawater and atmosphere during the Paleoproterozoic global glaciation

Shibuya T, Komiya T, Takai K, Maruyama S, Russell M J

Late Holocene uplift of the Izu Islands on the northern Zenisu Ridge off Central Japan

Kitamura A, Imai T, Mitsui Y, Ito M, Miyairi Y, Yokoyama Y, Tokuda Y

A 2700-year record of ENSO and PDO variability from the Californian margin based on coccolithophore assemblages and calcification

Luc Beaufort and Michaël Grelaud

Reactions between komatiite and CO2-rich seawater at 250 and 350°C, 500 bars: implications for hydrogen generation in the Hadean seafloor hydrothermal system

Ueda H, Shibuya T, Sawaki Y, Saitoh M, Takai K, Maruyama S

Hydrogen and carbon isotope systematics in hydrogenotrophic methanogenesis under H2-limited and -enriched conditions: Implications for the origin of methane and its isotopic diagnosis

Okumura T, Kawagucci S, Saito Y, Matsui Y, Takai K, and Imachi H

Hydrogen-rich hydrothermal environments in the Hadean ocean inferred from serpentinization of komatiites at 300 °C and 500 bar

Shibuya T, Yoshizaki M, Sato M, Shimizu K, Nakamura K, Omori S, Suzuki K, Takai K, Tsunakawa H, Maruyama S