Bottrell, S. H.; Parkes, R. J.; Cragg, B. A.; Raiswell, R. (2000): Isotopic evidence for anoxic pyrite oxidation and stimulation of bacterial sulphate reduction in marine sediments. Geological Society of London, London, United Kingdom, Journal of the Geological Society of London, 157, Part 4, 711-714, georefid:2000-054427

Abstract:
Pore-water sulphate concentrations show marked increases at depths >50 m at ODP sites 888 and 890/889 from the Cascadia Margin accretionary wedge. In the uppermost 10 m sulphate concentrations decrease with depth and sulphate delta (super 34) S and delta (super 18) O increase as sulphate is removed by bacterial sulphate reduction. Isotopic data show that sulphate formed below 50 m results from oxidation of early diagenetic pyrite and that oxygen in the sulphate molecules is derived from pore water. Fe (super 3+) in the sediment is the probable oxidizing agent. The increased sulphate concentrations stimulate bacterial sulphate reduction at depths of 70-250 m and are thus important in sustaining deep bacterial activity.
Coverage:
West: -126.5253 East: -126.3943 North: 48.4159 South: 48.0959
Relations:
Expedition: 146
Site: 146-888
Site: 146-889
Site: 146-890
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=2000-054427 (c.f. for more detailed metadata)
This metadata in ISO19139 XML format