Tracing bottom water oxygenation with sedimentary Mn/Fe ratios in Lake Zurich, Switzerland
dc.contributor.author | Naeher, Sebastian | |
dc.contributor.author | Gilli, A. | |
dc.contributor.author | North, R. | |
dc.contributor.author | Hamann, Y. | |
dc.contributor.author | Schubert, C. | |
dc.date.accessioned | 2017-01-30T10:54:34Z | |
dc.date.available | 2017-01-30T10:54:34Z | |
dc.date.created | 2014-10-08T01:14:47Z | |
dc.date.issued | 2013 | |
dc.identifier.citation | Naeher, S. and Gilli, A. and North, R. and Hamann, Y. and Schubert, C. 2013. Tracing bottom water oxygenation with sedimentary Mn/Fe ratios in Lake Zurich, Switzerland. Chemical Geology. 352: pp. 125-133. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/6669 | |
dc.identifier.doi | 10.1016/j.chemgeo.2013.06.006 | |
dc.description.abstract |
Redox dynamics of manganese (Mn) were studied in the sediment of Lake Zurich using precise sediment core age models, monthly long-term oxygen (O2) monitoring data of the water column (1936–2010) and high-resolution XRF core scanning. The age models were based on bi-annual lamination and calcite precipitation cycles. If present, Mn exhibits distinct maxima, which coincide with the annual maximum deep-water O2 concentrations in spring according to the monitoring data. In contrast, the iron (Fe) signal is mainly the result of calcite dilution, as indicated by a strong negative correlation between Fe and calcium (Ca) XRF data. The Mn/Fe ratio in the core from the maximum lake depth (ZH10-15, 137 m) revealed a moderate correlation with O2 measurements in the lake bottom water confirming the successful application of the Mn/Fe ratio to semi-quantitatively reconstruct bottom water oxygenation in the lake. Mostly low ratios were observed between 1895 and the mid-1960s as a result of eutrophication. However, geochemical focusing and sedimentological factors can reduce the applicability of the Mn/Fe ratio in reconstructing O2 concentrations in the bottom water of lakes. | |
dc.publisher | Elsevier Science BV | |
dc.subject | Oxygen | |
dc.subject | Redox | |
dc.subject | Mn/Fe ratio | |
dc.subject | XRF core scanning | |
dc.subject | Lake Zurich | |
dc.subject | Manganese | |
dc.title | Tracing bottom water oxygenation with sedimentary Mn/Fe ratios in Lake Zurich, Switzerland | |
dc.type | Journal Article | |
dcterms.source.volume | 352 | |
dcterms.source.startPage | 125 | |
dcterms.source.endPage | 133 | |
dcterms.source.issn | 0009-2541 | |
dcterms.source.title | Chemical Geology | |
curtin.accessStatus | Fulltext not available |