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| Content Provider | Springer Nature Link |
|---|---|
| Author | Helama, Samuli Heikkilä, Pasi Rinne, Katja Nielsen, Jan Kresten Nielsen, Jesper Kresten |
| Copyright Year | 2015 |
| Abstract | Understanding of the uranium uptake processes (both in vivo and post-mortem) into the skeletal structures of marine calcifiers is a subject of multi-disciplinary interest. U-concentration changes within the molluscan shell may serve as a paleoceanographic proxy of the pH history. A proxy of this type is needed to track the effects of fossil fuel emissions to ocean acidification. Moreover, attaining reliable U-series dates using shell materials would be a geochronological breakthrough. Picturing the high-resolution changes of U-concentrations in shell profiles is now possible by laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS). Here, we analyzed in situ U-concentration variations in sub-fossilized shells of ocean quahog (Arctica islandica), a commonly studied bivalve species in Quaternary geoscience, using LA-ICP-MS. Microstructural details of the shell profiles were achieved by the scanning electron microscopy (SEM). Comparison of the shell aragonite microstructure with the changes in U-concentration revealed that uranium of possibly secondary origin is concentrated into the porous granular layers of the shell. Our results reinforce the hypothesis that U-concentration variations can be linked with microstructural differences within the shell. A combination of LA-ICP-MS and SEM analyses is recommended as an interesting approach for understanding the U-concentration variations in similar materials. |
| Starting Page | 1 |
| Ending Page | 10 |
| Page Count | 10 |
| File Format | |
| ISSN | 01676369 |
| Journal | Environmental Monitoring and Assessment |
| Volume Number | 187 |
| Issue Number | 5 |
| e-ISSN | 15732959 |
| Language | English |
| Publisher | Springer International Publishing |
| Publisher Date | 2015-04-17 |
| Publisher Place | Cham |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Aragonite Ocean quahog Shell growth Uranium U-series dating Environmental Monitoring/Analysis Environmental Management Ecotoxicology Atmospheric Protection/Air Quality Control/Air Pollution Ecology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pollution Medicine Management, Monitoring, Policy and Law |
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