In situ mapping of growth lines in the calcitic prismatic layers of mollusc shells using X-ray absorption near-edge structure (XANES) spectroscopy at the sulphur K-edge

Dauphin, Yannicke; Cuif, Jean‐Pierre; Doucet, J.; Salomé, Murielle; Susini, J.; Williams, C. T.

doi:10.1007/s00227-002-0950-2

Cited by 76 publications

(72 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…µ-XANES can be used to map the distribution of sulfur species and some elements content at high spatial resolution [14][15][16][17][18].…”

Section: Xanes-sulfur Speciations and Elemental Compositions Distribumentioning

confidence: 99%

“…This confirms the high specificity of organic compositions of mollusc shell layers that are strongly correlated to microstructural types. So far, the only feature that seems common to bivalve shells such as P. margaritifera or Pinna nobilis (Bivalvia, Pteriomorphia) [16], or gastropod shells such as Haliotis tuberculata (Gastropoda, Vetigastropoda) [14] or N. undata, is that the calcite "prisms" (as seen above, this appellation might not be well fitting for N. undata's outer layer) are always much enriched in S-polysaccharides compared to the other microstructural types present in other layers of the shells.…”

Section: Shift In Biochemical Compositionsmentioning

confidence: 99%

See 1 more Smart Citation

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

et al. 2012

View full text Add to dashboard Cite

Nerita undata is a marine gastropod, the shell of which consists of an external layer composed of very fine, long and undulating calcite prisms, and of an internal aragonite crossed-lamellar layer. As for any Ca-carbonate shell, both layers are composite materials, resulting from the sub-micrometric association of organic macromolecules with the mineral phase. But at the transition between the two layers, in situ synchrotron-based mapping using µ-XANES spectroscopy performed at the S K-edge and SR-FTIR spectroscopy reveals that biochemical compositions change correlatively with the mineral phase, such as displayed by the distribution of sulfur-containing organic compounds (S-polysaccharides or S-amino acids) and organic molecular groups (amide I and II bands). These results highlight the complex change of secretory activity operated by the mineralizing tissue (the mollusk mantle) between these two parts of the shell, which is suspected to minutely control the setting-up of the crossed-lamellar microstructural pattern over the calcite prisms-A not so straightforward feature.

show abstract

“…µ-XANES can be used to map the distribution of sulfur species and some elements content at high spatial resolution [14][15][16][17][18].…”

Section: Xanes-sulfur Speciations and Elemental Compositions Distribumentioning

confidence: 99%

Section: Shift In Biochemical Compositionsmentioning

confidence: 99%

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

et al. 2012

View full text Add to dashboard Cite

show abstract

“…-From a biochemical standpoint, hydrated glycoconjugate components are present at a nanometre scale in both structures and exhibit the same spatial relationships (for XANES pictures of Pinna prisms see Dauphin et al, 2003).…”

Section: The Coral Fibre: a Matrix-mediated Biocrystalmentioning

confidence: 99%

The Environment Recording Unit in coral skeletons – a synthesis of structural and chemical evidences for a biochemically driven, stepping-growth process in fibres

2005

Self Cite

View full text Add to dashboard Cite

Abstract. This paper gathers a series of structural and biochemical in situ characterizations carried out to improve our knowledge of the fine scale growth patterns of fibres in coral skeletons. The resulting data show a clear correspondence between the mineral subunits of fibres and the spatial distribution of organic macromolecules. New observations using atomic force microscope confirm the close relationship between mineral and organic phases at the nanometre scale.Synthesis of these data results in a significant change in our concept of the mineralization process in coral skeletons. In contrast to the usual view of an aggregate of purely mineral units independently growing by simple chemical precipitation, coral fibres appear to be fully controlled structures. Their growth process is based on cyclic secretion of mineralizing compounds by the polyp basal ectoderm. These biochemical components of the coral fibres, in which sulfated acidic proteoglycans probably play a major role, are repeatedly produced (proteoglycans are those glycoproteins whose carbohydrate moieties consist of long unbranched chains of sulfated amino sugars). This results in a stepping growth mode of fibres and a layered global organization of coral skeletons.Therefore, in contrast to the widely accepted geochemical interpretation, we propose a fibre growth model that places coral skeletons among the typical "matrix mediated" structures. The crystal-like fibres are built by superimposition of few micron-thick growth layers. A biomineralization cycle starts by the secretion of a mineralizing matrix and the final step is the crystallization phase, during which mineral material grows onto the organic framework. Thus, each growth layer is the actual Environment Recording Unit.Correspondence to: J. P. Cuif (cuif@geophy.geol.u-psud.fr) From a practical standpoint, these results may contribute to develop a new high resolution approach of the environment recording by coral skeletons.

show abstract

“…It has also been suggested that organics may influence the skeletal metal content, but such relations have not been quantified (Allison, 1996;Nürnberg et al, 1996;Watanabe et al, 2001;Dauphin et al, 2003;Takesue and van Geen, 2004;Foster et al, 2008). Organics occur both within (intracrystalline; Pokroy et al, 2006;Jacob et al, 2008) and between (intercrystalline) CaCO 3 crystals.…”

Section: Introductionmentioning

confidence: 99%

Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (<i>Arctica islandica</i>)—Comparison of ICP-OES and LA-ICP-MS data

Schöne¹,

Zhang²,

Jacob³

et al. 2010

Geochem. J.

109

View full text Add to dashboard Cite

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 that some organic components exert a major influence on the skeletal metal content, the element chemistry of different shell components (insoluble organic matrix, IOM; dissolved CaCO 3 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 (130 ppm) 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 increase estimates 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 overestimated by 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 IOMderived magnesium concentrations is therefore strongly advised. The different chemistry of the IOM may also exert a major 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.

show abstract

In situ mapping of growth lines in the calcitic prismatic layers of mollusc shells using X-ray absorption near-edge structure (XANES) spectroscopy at the sulphur K-edge

Cited by 76 publications

References 9 publications

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

The Environment Recording Unit in coral skeletons – a synthesis of structural and chemical evidences for a biochemically driven, stepping-growth process in fibres

Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (<i>Arctica islandica</i>)—Comparison of ICP-OES and LA-ICP-MS data

Contact Info

Product

Resources

About

In situ mapping of growth lines in the calcitic prismatic layers of mollusc shells using X-ray absorption near-edge structure (XANES) spectroscopy at the sulphur K-edge

Cited by 76 publications

References 9 publications

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

Biochemical Change at the Setting-up of the Crossed-Lamellar Layer in Nerita undata Shell (Mollusca, Gastropoda)

The Environment Recording Unit in coral skeletons – a synthesis of structural and chemical evidences for a biochemically driven, stepping-growth process in fibres

Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (<i>Arctica islandica</i>)&mdash;Comparison of ICP-OES and LA-ICP-MS data

Contact Info

Product

Resources

About

Effect of organic matrices on the determination of the trace element chemistry (Mg, Sr, Mg/Ca, Sr/Ca) of aragonitic bivalve shells (<i>Arctica islandica</i>)—Comparison of ICP-OES and LA-ICP-MS data