2014
DOI: 10.1016/j.gca.2014.06.003
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Redox conditions and trace metal cycling in coastal sediments from the maritime Antarctic

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Cited by 42 publications
(53 citation statements)
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References 122 publications
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“…The slope of relationship between the concentration changes was equivalent to one mole of *Fe for every 1.3 moles of SO 4 2− , which suggests a mixture of FeS and FeS 2 precipitation, or perhaps FeS and elemental sulphur (Bottrell et al , ; Schoonen, ), rather than removal by FeS 2 alone (because this would produce a net molar ratio of two). Apart from low temperatures, a major reason for this effect not being more apparent is most likely the lack of organic matter in the floodplain sediments (Raiswell and Canfield, ), as has also been inferred from the pore water and sediment geochemistries of fjord sediment cores from close proximity to glaciers in Svalbard (Wehrmann et al , ) and the maritime Antarctic (Monien et al , ). A most interesting speculation, therefore, is whether the stabilization of the floodplain environment by vegetation (that usually follows deglaciation: Milner et al , ), will result in quantitatively more important rates of pyrite precipitation, resulting in a switch towards net iron storage within the floodplain.…”
Section: Discussionmentioning
confidence: 97%
“…The slope of relationship between the concentration changes was equivalent to one mole of *Fe for every 1.3 moles of SO 4 2− , which suggests a mixture of FeS and FeS 2 precipitation, or perhaps FeS and elemental sulphur (Bottrell et al , ; Schoonen, ), rather than removal by FeS 2 alone (because this would produce a net molar ratio of two). Apart from low temperatures, a major reason for this effect not being more apparent is most likely the lack of organic matter in the floodplain sediments (Raiswell and Canfield, ), as has also been inferred from the pore water and sediment geochemistries of fjord sediment cores from close proximity to glaciers in Svalbard (Wehrmann et al , ) and the maritime Antarctic (Monien et al , ). A most interesting speculation, therefore, is whether the stabilization of the floodplain environment by vegetation (that usually follows deglaciation: Milner et al , ), will result in quantitatively more important rates of pyrite precipitation, resulting in a switch towards net iron storage within the floodplain.…”
Section: Discussionmentioning
confidence: 97%
“…A significant Mn contribution to the oxidative sulfur cycle is expected in anoxic basins (e.g. Huckriede & Meischner, ) or in shelf sediments particularly those off polar regions (Monien et al ., ; Wehrmann et al ., ), where sediment delivery pathways and oceanographic conditions lead to enhanced Mn content within the sediment. At Site C0012, and subduction zones worldwide, there is significant ash input to the sediment, which upon alteration releases reactive manganese and iron.…”
Section: Discussionmentioning
confidence: 99%
“…853593). For sample preparations and geochemical analyses refer to Monien et al [25]; for grainsize analysis refer to [35]. The entire sampling period includes the years 1992-2015.…”
Section: (B) Environmental Datamentioning
confidence: 99%
“…Processed data are downloadable as 5 m × 5 m raster datasets (https://doi.pangaea.de/10.1594/PANGAEA.856971) and are presented in the electronic supplementary material, appendix S1; figure S1. parameter source parameter source aluminium oxide (wt%), Al 2 O 3 , surface [25] sodium oxide (wt%), Na 2 O, surface [25] . averaged standard error) resulting from different interpolation methods (e.g.…”
Section: (B) Environmental Datamentioning
confidence: 99%