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Li Isotope Behaviour in the Low Salinity Zone During Estuarine Mixing
Department of Earth Science, University of Oxford.
Institute of Earth and Planetary Science, University College London.
Department of Earth Science, University of Oxford.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-2276-0564
2014 (English)In: Procedia: Earth and Planetary Science, ISSN 1878-5220, Vol. 10, p. 204-207Article in journal (Refereed) Published
Abstract [en]

During mixing of river water and seawater, changes in water chemistry can affect the behaviour of elements in estuaries, and consequently may alter their input into the oceans. In order to evaluate this, lithium (Li) concentrations and isotope compositions of estuarine waters from the Kalix and Råne River estuaries (Northern Sweden) have been determined. The waters span δ7Li values of +21.7 to +30.4 ‰, with the lowest values found within the shallowest samples with the lowest salinities. Dissolved Li concentrations show near conservative behaviour with increasing salinity; however their δ7Li isotopic compositions may be explained by either conservative mixing with an intermediate salinity Bothnian Bay end member; or non-conservative behaviour, with excess Li added to solution during mixing. The non-conservative behaviour of Li might be ascribed to cation exchange processes with suspended riverine particles or weathering during mixing with seawater within the low salinity zones of the Kalix and Råne River estuaries.The existence of non-conservative mixing of Li in estuarine environments suggests that the Li isotopic riverine input signature could be modified within estuaries, which may affect the marine and palaeo-marine budgets. Hence, this has important implications for the estimation of the fluvial Li flux into the oceans

Place, publisher, year, edition, pages
2014. Vol. 10, p. 204-207
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-7050DOI: 10.1016/j.proeps.2014.08.020Local ID: 55e1cda2-d643-43d1-ad97-8c16b7427f61OAI: oai:DiVA.org:ltu-7050DiVA: diva2:979937
Conference
Geochemistry of the Earth's surface : Between Rocks and Sky : Earth’s Critical Zone 18/08/2014 - 22/08/2014
Note
Godkänd; 2014; 20140828 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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