Understanding the fate of iron in a modern temperate estuary: Leirarvogur, Iceland

Byrne, G.M., Worden, R.H., Hodgson, D.M., Polya, D.A., Lythgoe, P.R., Barrie, C.D. and Boyce, A.J. (2011) Understanding the fate of iron in a modern temperate estuary: Leirarvogur, Iceland. Applied Geochemistry, 26(Sup), S16-S19. (doi: 10.1016/j.apgeochem.2011.03.018)

Abstract

Fluvial dissolved Fe concentrations decrease upon mixing with seawater, resulting in the formation of Fe-floccules. However, a clear understanding of the fate of these floccules has yet to be established. Assessing how tidal processes affect the formation of Fe-colloids in the Leirárvogur estuary, SW Iceland, is an important step in understanding the formation and potential deposition of estuarine Fe-rich minerals within this estuarine system. The Leirárvogur estuary drains predominately Fe-rich basalt, increasing the likelihood of detecting changes in Fe-phases. Fluvial waters and local lake waters that drain into the estuary were compared and the effects of seasonal changes were considered, in an attempt to understand how varying end-members and external factors play a role in Fe-rich mineral formation. Aqueous and colloidal Fe concentrations were found to be greater towards the head of the Leirárvogur estuary, suggesting that potential Fe-rich minerals and complexes are forming at sites of fluvial input. Increasing suspended colloidal Fe towards the estuary mouth suggests that Fe-colloids are readily transported seaward.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Boyce, Professor Adrian and Barrie, Dr Craig
• Authors: Byrne, G.M., Worden, R.H., Hodgson, D.M., Polya, D.A., Lythgoe, P.R., Barrie, C.D., and Boyce, A.J.
• College/School: College of Science and Engineering > Scottish Universities Environmental Research Centre
• Journal Name: Applied Geochemistry
• Publisher: Elsevier Ltd.
• ISSN: 0883-2927
• ISSN (Online): 1872-9134