Journal article

Crustal fluid and ash alteration impacts on the biosphere of Shikoku Basin sediments, Nankai Trough, Japan

ME Torres, T Cox, W-L Hong, J Mcmanus, JC Sample, C Destrigneville, HM Gan, HY Gan, JW Moreau

GEOBIOLOGY | WILEY | Published : 2015


We present data from sediment cores collected from IODP Site C0012 in the Shikoku Basin. Our site lies at the Nankai Trough, just prior to subduction of the 19 Ma Philippine Sea plate. Our data indicate that the sedimentary package is undergoing multiple routes of electron transport and that these differing pathways for oxidant supply generate a complex array of metabolic routes and microbial communities involved in carbon cycling. Numerical simulations matched to pore water data document that Ca(2+) and Cl(1-) are largely supplied via diffusion from a high-salinity (44.5 psu) basement fluid, which supports the presence of halophile Archean communities within the deep sedimentary package tha..

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University of Melbourne Researchers


Awarded by US National Science Foundation

Awarded by Australian Research Council (ARC)

Funding Acknowledgements

This research used samples and data provided by the Integrated Ocean Drilling Program (IODP), which is sponsored by the US National Science Foundation and participating countries under management of IODP-MI. We gratefully acknowledge the efforts of the D/V Chikyu shipboard and drilling personnel and of the Scientific Parties of IODP Expeditions 322 and 333. We thank Jesse Muratli and Meghan R. Megowan for assistance with geochemical analyses. Funding for this research was provided by the U.S. National Science Foundation (Grants OCE-1029981 to MT, OCE-1029972 to JS and OCE-0929339 to JM). In addition, we acknowledge support from the Australia-New Zealand IODP Consortium and Australian Research Council (ARC DP110103668 to JWM) and the Hanse-Wissenschaftskolleg, Institute for Advanced Study in Delmenhorst, Germany through a fellowship to MT in 2013 and 2014.