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dc.contributor.author
Schöne, Bernd R.
dc.contributor.author
Zhang, Zengjie
dc.contributor.author
Jacob, Dorrit E.
dc.contributor.author
Gillikin, David P.
dc.contributor.author
Tütken, Thomas
dc.contributor.author
Garbe-Schönberg, Dieter
dc.contributor.author
McConnaughey, Ted
dc.contributor.author
Soldati, Analía Leticia
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dc.date.available
2024-08-13T11:29:47Z
dc.date.issued
2010-03
dc.identifier.citation
Schöne, Bernd R.; Zhang, Zengjie; Jacob, Dorrit E.; Gillikin, David P.; Tütken, Thomas; et al.; Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (Arctica islandica)—Comparison of ICP-OES and LA-ICP-MS data; Geochemical Soc Japan, C/o Int Acad Printing Co Ltd; Geochemical Journal; 44; 1; 3-2010; 23-37
dc.identifier.issn
0016-7002
dc.identifier.uri
http://hdl.handle.net/11336/242352
dc.description.abstract
The element chemistry of biogenic carbonates can provide important data on past environments. However, the Sr/Ca and Mg/Ca ratios as well as the Mg and Sr concentrations of biological carbonates, especially aragonitic bivalves often depart from apparent thermodynamic equilibrium. When measured in situ by means of LA-ICP-MS, the Mg concentration is often substantially enriched (two- to threefold) near the organic-rich, annual growth lines. To test the hypothesis thatsome organic components exert a major influence on the skeletal metal content, the element chemistry of different shell components (insoluble organic matrix, IOM; dissolved CaCO3 and soluble organics, SOM) of Arctica islandica was measured by means of ICP-OES and LA-ICP-MS. The ICP-OES data indicate that the IOM is strongly enriched in Mg (130ppm) and depleted in Sr and Ca (10 ppm and 0.22 wt%, respectively) when compared to the whole biomineral (Mg: 68 to 99 ppm, Sr: 860 to 1,060 ppm, Ca: ~35.72 wt%). Although the average relative abundance of the IOM barely exceeds 0.46 wt%, its chemical composition in combination with its heterogeneous distribution across the shell can significantly increaseestimates of the Mg concentration if measured in situ by LA-ICP-MS. Depending on the distribution of the IOM, the Ca concentration may be significantly lower locally than the average Ca concentration of the whole shell (35.72 wt%). If this remains undetected, the Mg concentration of shell portions with higher than average IOM content is overestimatedby LA-ICP-MS and, conversely, the Mg concentration is underestimated in shell portions with lower than average IOM content. Removal of the IOM prior to the chemical analysis by LA-ICP-MS or mathematical correction for the IOM derived magnesium concentrations is therefore strongly advised. The different chemistry of the IOM may also exert amajor control on the trace element to calcium ratios. Shell portions enriched in IOM will show up to 200 times higher Mg/Ca and up to two times higher Sr/Ca ratios than the average shell of A. islandica. Without removal of the IOM prior to the analysis, Mg/Ca and Sr/Ca ratios of shell portions with higher IOM content cannot be used as paleothermometers. Because it is currently impossible to remove the IOM prior to chemical analyses by LA-ICP-MS, we recommend the use of wet chemical techniques (= possibility to separate and measure individual shell components) such as ICP-OES at the expense of lower sampling resolution. The results of this study will significantly improve our understanding of shellbased climate and environmental proxies.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geochemical Soc Japan, C/o Int Acad Printing Co Ltd
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
TRACE ELEMENTS
dc.subject
BIVALVE SHELL
dc.subject
ORGANICS
dc.subject
LA-ICP-MS
dc.subject.classification
Geoquímica y Geofísica
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (Arctica islandica)—Comparison of ICP-OES and LA-ICP-MS data
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-12T13:51:14Z
dc.journal.volume
44
dc.journal.number
1
dc.journal.pagination
23-37
dc.journal.pais
Japón
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dc.journal.ciudad
Tokio
dc.description.fil
Fil: Schöne, Bernd R.. Johannes Gutenberg Universitat Mainz; Alemania
dc.description.fil
Fil: Zhang, Zengjie. Johannes Gutenberg Universitat Mainz; Alemania
dc.description.fil
Fil: Jacob, Dorrit E.. Johannes Gutenberg Universitat Mainz; Alemania
dc.description.fil
Fil: Gillikin, David P.. Vassar College; Estados Unidos
dc.description.fil
Fil: Tütken, Thomas. Universitat Bonn; Alemania
dc.description.fil
Fil: Garbe-Schönberg, Dieter. Christian Albrechts Universitat Zu Kiel; Alemania
dc.description.fil
Fil: McConnaughey, Ted. No especifíca;
dc.description.fil
Fil: Soldati, Analía Leticia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Johannes Gutenberg Universitat Mainz; Alemania
dc.journal.title
Geochemical Journal
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.jstage.jst.go.jp/article/geochemj/44/1/44_1.0045/_article
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.2343/geochemj.1.0045
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