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dc.contributor.authorFoster, L.C.*
dc.contributor.authorFinch, A.A.*
dc.contributor.authorClarke, Leon J.*
dc.contributor.authorAndersson, C.*
dc.contributor.authorAllison, N.*
dc.date.accessioned2011-02-02T16:02:05Z
dc.date.available2011-02-02T16:02:05Z
dc.date.issued2008
dc.identifier.citationFoster, L. C., Finch, A. A., Allison, N., Andersson, C. and Clarke, L. J. (2008). Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica. Chemical Geology. Vol. 254, No. 1/2, pp. 113-119.en_US
dc.identifier.urihttp://hdl.handle.net/10454/4766
dc.descriptionnoen_US
dc.description.abstractThe potential of Mg in Arctica islandica as a climate proxy is explored through analysis of live-collected shells from Irvine Bay, NW Scotland. Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) analysis of the right hand valve from two specimens indicates that seasonal Mg/Ca variations do not correlate with seawater temperature. The highest Mg/Ca typically occurs at the annual growth checks in ~ November¿February. Mg/Ca variations between growth checks are significant in one specimen but usually not significant in the other. Mg/Ca measurements taken laterally across the band (i.e. perpendicular to direction of the growth) to determine heterogeneity of the aragonite deposited at the same time indicates that Mg/Ca concentration decreases with increasing distance from the periostracum in both shells. X-ray Absorption Near Edge Spectroscopy (XANES) indicates that Mg is not substituted into aragonite but is hosted by a disordered phase e.g. organic components or nanoparticles of an inorganic phase. Shell Mg/Ca variations may reflect changes in the concentration or composition of the disorded phase, as well as changes in the composition of the extrapallial fluid used for calcification. Such changes could reflect the relative transportation rates of Mg and Ca to the calcification site.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttp://dx.doi.org/10.1016/j.chemgeo.2008.06.007en_US
dc.subjectArctica islandicaen_US
dc.subjectBivalve shellsen_US
dc.subjectClimate reconstructionen_US
dc.subjectX-ray Absorption Near Edge Spectroscopy (XANES)en_US
dc.subjectIrvine Bay, NW Scotlanden_US
dc.subjectShell Mg/Caen_US
dc.titleMg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandicaen_US
dc.status.refereedYesen_US
dc.typeArticleen_US
dc.type.versionpublished version paperen_US


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