| dc.creator |
Helama, Samuli |
|
| dc.creator |
Rinne, Katja |
|
| dc.creator |
Nielsen, Jan Kresten |
|
| dc.creator |
Nielsen, Jesper Kresten |
|
| dc.creator |
Heikkila, Pasi |
|
| dc.date |
2015-05-01T00:00:00Z |
|
| dc.date.accessioned |
2021-12-03T11:28:49Z |
|
| dc.date.available |
2021-12-03T11:28:49Z |
|
| dc.identifier |
54c679dc-9b22-4611-b209-8c5f6418a728 |
|
| dc.identifier |
10.1007/s10661-015-4495-5 |
|
| dc.identifier |
https://avesis.sdu.edu.tr/publication/details/54c679dc-9b22-4611-b209-8c5f6418a728/oai |
|
| dc.identifier.uri |
http://acikerisim.sdu.edu.tr/xmlui/handle/123456789/91903 |
|
| dc.description |
Understanding of the uranium uptake processes (both in vivo and post-mortem) into the skeletal structures of marine calcifiers is a subject of multidisciplinary 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. |
|
| dc.language |
eng |
|
| dc.rights |
info:eu-repo/semantics/closedAccess |
|
| dc.title |
LA-ICP-MS-derived U-concentrations and microstructural domains within biogenic aragonite of Arctica islandica shell |
|
| dc.type |
info:eu-repo/semantics/article |
|