Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica
no The 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...
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Language: | English |
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Online Access: | http://hdl.handle.net/10454/4766 https://doi.org/10.1016/j.chemgeo.2008.06.007 |
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ftunivbradford:oai:bradscholars.brad.ac.uk:10454/4766 2024-04-21T07:56:06+00:00 Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica Foster, L.C. Finch, A.A. Clarke, Leon J. Andersson, C. Allison, N. 2008 http://hdl.handle.net/10454/4766 https://doi.org/10.1016/j.chemgeo.2008.06.007 en eng Foster, 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. http://hdl.handle.net/10454/4766 https://doi.org/10.1016/j.chemgeo.2008.06.007 Arctica islandica Bivalve shells Climate reconstruction X-ray Absorption Near Edge Spectroscopy (XANES) Irvine Bay NW Scotland Shell Mg/Ca Article published version paper 2008 ftunivbradford https://doi.org/10.1016/j.chemgeo.2008.06.007 2024-03-27T15:40:00Z no The 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. Article in Journal/Newspaper Arctica islandica Bradford Scholars@University of Bradford Chemical Geology 254 1-2 113 119 |
institution |
Open Polar |
collection |
Bradford Scholars@University of Bradford |
op_collection_id |
ftunivbradford |
language |
English |
topic |
Arctica islandica Bivalve shells Climate reconstruction X-ray Absorption Near Edge Spectroscopy (XANES) Irvine Bay NW Scotland Shell Mg/Ca |
spellingShingle |
Arctica islandica Bivalve shells Climate reconstruction X-ray Absorption Near Edge Spectroscopy (XANES) Irvine Bay NW Scotland Shell Mg/Ca Foster, L.C. Finch, A.A. Clarke, Leon J. Andersson, C. Allison, N. Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
topic_facet |
Arctica islandica Bivalve shells Climate reconstruction X-ray Absorption Near Edge Spectroscopy (XANES) Irvine Bay NW Scotland Shell Mg/Ca |
description |
no The 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. |
format |
Article in Journal/Newspaper |
author |
Foster, L.C. Finch, A.A. Clarke, Leon J. Andersson, C. Allison, N. |
author_facet |
Foster, L.C. Finch, A.A. Clarke, Leon J. Andersson, C. Allison, N. |
author_sort |
Foster, L.C. |
title |
Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
title_short |
Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
title_full |
Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
title_fullStr |
Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
title_full_unstemmed |
Mg in aragonitic bivalve shells: Seasonal variations and mode of incorporation in Arctica islandica |
title_sort |
mg in aragonitic bivalve shells: seasonal variations and mode of incorporation in arctica islandica |
publishDate |
2008 |
url |
http://hdl.handle.net/10454/4766 https://doi.org/10.1016/j.chemgeo.2008.06.007 |
genre |
Arctica islandica |
genre_facet |
Arctica islandica |
op_relation |
Foster, 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. http://hdl.handle.net/10454/4766 https://doi.org/10.1016/j.chemgeo.2008.06.007 |
op_doi |
https://doi.org/10.1016/j.chemgeo.2008.06.007 |
container_title |
Chemical Geology |
container_volume |
254 |
container_issue |
1-2 |
container_start_page |
113 |
op_container_end_page |
119 |
_version_ |
1796938250157293568 |