The geochemistry of iron and manganese in the waters and sediments of Bolstadfjord,S.W. Norway |
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| Authors: | John Hamilton-Taylor NBrian Price |
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| Institution: | 1. Department of Environmental Sciences, University of Lancaster, Lancaster, England LA1 4YQ;2. Grant Institute of Geology, University of Edinburgh, West Mains Road, Edinburgh, Scotland EH9 3JW |
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| Abstract: | The distributions of dissolved and solid phase Fe and Mn have been variously determined in vertical profiles through the water column and sediments at three stations in Bolstadfjord, S.W. Norway. Elevated concentrations of dissolved and suspended particulate Fe and Mn are associated with restricted deep waters as a result of redox reactions and with river discharge. The basin sediments are anoxic throughout but because of the greatly restricted circulation, remobilized Fe and Mn appear to remain predominantly trapped within the fjord. Differentiation of Fe and Mn occurs to the extent that Fe sulphide precipitation is ubiquitous in the sediments whereas the entrapment of Mn, probably through Mn carbonate precipitation, is found only in the sediments of the more seaward basin (maximum Mn content of 1·5% by weight). |
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| Keywords: | Manganese iron anoxic conditions sediment concentrations interstitial water water columns fjords Norway coast |
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