Spectral luminescence and geochemistry of coral aragonite: Effects of whole-core treatment

Nagtegaal, R.; Grove, Craig A.; Kasper, Sebastian; Zinke, Jens; Boer, Wim; Brummer, Geert-Jan A

doi:10.1016/j.chemgeo.2012.05.006

Cited by 41 publications

(45 citation statements)

References 46 publications

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“…T1-T3 are parallel to the shell edge, and T4 and T5 are parallel to the external and internal shell margin (respectively). tion in coral cores (Nategaal et al, 2012). Krause-Nehring et al (2011) performed their study on powdered, pre-cleaned shells (manual removal of the periostracum) and found very little effect.…”

Section: Sample Preparationmentioning

confidence: 99%

Geochemical and microstructural characterisation of two species of cool-water bivalves (Fulvia tenuicostata and Soletellina biradiata) from Western Australia

et al. 2017

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Abstract. The shells of two marine bivalve species (Fulvia tenuicostata and Soletellina biradiata) endemic to south Western Australia have been characterised using a combined crystallographic, spectroscopic and geochemical approach. Both species have been described previously as purely aragonitic; however, this study identified the presence of three phases, namely aragonite, calcite and Mg-calcite, using XRD analysis. Data obtained via confocal Raman spectroscopy, electron probe microanalysis and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) show correlations between Mg / S and Mg / P in F. tenuicostata and between Sr / S and S / Ba in S. biradiata. The composition of the organic macromolecules that constitute the shell organic matrix (i.e. the soluble phosphorus-dominated and/or insoluble sulfur-dominated fraction) influences the incorporation of Mg, Sr and Ba into the crystal lattice. Ionic substitution, particularly Ca 2+ by Mg 2+ in calcite in F. tenuicostata, appears to have been promoted by the combination of both S-and P-dominated organic macromolecules. The elemental composition of these two marine bivalve shells is species specific and influenced by many factors, such as crystallographic structure, organic macromolecule composition and environmental setting. In order to reliably use bivalve shells as proxies for paleoenvironmental reconstructions, both the organic and inorganic crystalline material need to be characterised to account for all influencing factors and accurately describe the "vital effect".

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Section: Sample Preparationmentioning

confidence: 99%

Geochemical and microstructural characterisation of two species of cool-water bivalves (Fulvia tenuicostata and Soletellina biradiata) from Western Australia

et al. 2017

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“…The method of sample dissolution, dilution, quantification, and drift correction is described in Nagtegaal et al (2012). Accuracies were determined using a JCp-1 Porites sp.…”

Section: Solution Icp-msmentioning

confidence: 99%

“…With a diamond coated drill, subsamples were taken every 1 mm parallel to the growth axis, equivalent to approximately monthly resolution. All coral slabs were cleaned with sodium hypochlorite (NaOCl, 10-13 % reactive chloride; Sigma-Aldrich Company) for 24 h, after sub-sampling for geochemistry, to remove residual organics that might quench luminescence (Nagtegaal et al, 2012).…”

Section: Coral Samplingmentioning

confidence: 99%

Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

et al. 2012

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Abstract. Coral cores provide vital climate reconstructions for site-specific temporal variability in river flow and sediment load. Yet, their ability to record spatial differences across multiple catchments is relatively unknown. Here, we investigate spatial linkages between four coral proxies of terrestrial runoff and their relationships between sites. Coral cores were drilled in and around Antongil Bay, the largest bay in Madagascar, and individually analysed for fifteen years of continuous luminescence (G / B), Ba / Ca, δ 18 O sw and δ 13 C data. Each coral core was drilled close to individual river mouths (≤ 7 km), and proxy data were compared to modelled river discharge and sediment runoff data for the three corresponding catchments. A reasonable agreement between terrestrial runoff proxies with modelled river discharge and sediment yield was observed. Some inconsistencies between proxy and modelled data are likely linked to proxy behaviour, watershed size and local environmental physiochemical parameters. In general, the further a coral resided from its river source, the weaker the proxy relationship was with modelled data and other corals, due to mixing gradients and currents. Nevertheless, we demonstrate that two coral Ba / Ca and luminescence (G / B) records influenced by the same watershed are reproducible. Furthermore, a strong Ba / Ca relationship was observed between two cores from distant watersheds, with baseline averages in agreement with modelled sediment runoff data. As humic acids behave conservatively in the water column, luminescence (G / B) data gave the highest regional correlations between cores, and showed the most consistent relationship with site specific modelled discharge. No statistical relationship was observed between cores in terms of interannual δ 18 O sw and δ 13 C, meaning corals were recording a localised signal at their respective sites, confounded by vital effects. Comparing proxy baseline averages and mean seasonal cycles provided a good overview of the runoff dynamics of the bay system.

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“…As well as identifying the growth axis and physical discrepancies, down-core changes in skeletal composition unrelated to humic acids or aragonite can also be observed (Grove et al 2010;Nagtegaal et al 2012). Primarily, organic contaminants appear responsible for quenching the luminescence signal of coral cores, which are easily visually identified as dark stains or patches when placed under UV light,.…”

Section: Preparation Of Coral Cores Before Slsmentioning

confidence: 94%

“…Primarily, organic contaminants appear responsible for quenching the luminescence signal of coral cores, which are easily visually identified as dark stains or patches when placed under UV light,. Such (organic) contaminants can have a detrimental effect on both luminescence and geochemical data (Nagtegaal et al 2012).…”

Section: Preparation Of Coral Cores Before Slsmentioning

confidence: 99%

UV-Spectral Luminescence Scanning: Technical Updates and Calibration Developments

Grove

Rodríguez-Ramírez

Merschel

et al. 2015

Micro-XRF Studies of Sediment Cores

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Spectral luminescence and geochemistry of coral aragonite: Effects of whole-core treatment

Cited by 41 publications

References 46 publications

Geochemical and microstructural characterisation of two species of cool-water bivalves (<i>Fulvia tenuicostata</i> and <i>Soletellina biradiata</i>) from Western Australia

Geochemical and microstructural characterisation of two species of cool-water bivalves (<i>Fulvia tenuicostata</i> and <i>Soletellina biradiata</i>) from Western Australia

Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

UV-Spectral Luminescence Scanning: Technical Updates and Calibration Developments

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Spectral luminescence and geochemistry of coral aragonite: Effects of whole-core treatment

Cited by 41 publications

References 46 publications

Geochemical and microstructural characterisation of two species of cool-water bivalves (&lt;i&gt;Fulvia tenuicostata&lt;/i&gt; and &lt;i&gt;Soletellina biradiata&lt;/i&gt;) from Western Australia

Geochemical and microstructural characterisation of two species of cool-water bivalves (&lt;i&gt;Fulvia tenuicostata&lt;/i&gt; and &lt;i&gt;Soletellina biradiata&lt;/i&gt;) from Western Australia

Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar

UV-Spectral Luminescence Scanning: Technical Updates and Calibration Developments

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Product

Resources

About

Geochemical and microstructural characterisation of two species of cool-water bivalves (<i>Fulvia tenuicostata</i> and <i>Soletellina biradiata</i>) from Western Australia

Geochemical and microstructural characterisation of two species of cool-water bivalves (<i>Fulvia tenuicostata</i> and <i>Soletellina biradiata</i>) from Western Australia