Abundance and opal input of radiolarian species of two sediment cores from the Atlantic sector of the Southern Ocean
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2009
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| _version_ | 1867170456858001408 |
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| author | Jacot des Combes, Hélène Abelmann, Andrea |
| author_facet | Jacot des Combes, Hélène Abelmann, Andrea |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Radiolarian-based paleoceanographic reconstructions generally use the abundance of selected radiolarian species. However, the recent focus on the opal flux and the development of isotope measurements in biogenic opal and the organic matter embedded in it demands a better knowledge of the origin of the opal. We present here an estimation of the opal content of the skeleton of 63 radiolarian species from two sites in the Southern Ocean. The skeletons are modelled as associations of simple geometrical shapes, and the volume thus obtained is combined with opal density to obtain the amount of opal. These data are, thus, used to determine the most important opal carriers in the radiolarian assemblage in both cores. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_734967 |
| institution | PANGAEA |
| language | en |
| publishDate | 2009 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Abundance and opal input of radiolarian species of two sediment cores from the Atlantic sector of the Southern Ocean Jacot des Combes, Hélène Abelmann, Andrea ANT-VIII/3; ANT-XI/2; AWI_Paleo; Gravity corer (Kiel type); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS16; PS16/311; PS1768-8; PS2498-1; PS28; PS28/304; Shona Ridge; SL; South Atlantic Ocean; SPP1158 Radiolarian-based paleoceanographic reconstructions generally use the abundance of selected radiolarian species. However, the recent focus on the opal flux and the development of isotope measurements in biogenic opal and the organic matter embedded in it demands a better knowledge of the origin of the opal. We present here an estimation of the opal content of the skeleton of 63 radiolarian species from two sites in the Southern Ocean. The skeletons are modelled as associations of simple geometrical shapes, and the volume thus obtained is combined with opal density to obtain the amount of opal. These data are, thus, used to determine the most important opal carriers in the radiolarian assemblage in both cores. |
| title | Abundance and opal input of radiolarian species of two sediment cores from the Atlantic sector of the Southern Ocean |
| topic | ANT-VIII/3; ANT-XI/2; AWI_Paleo; Gravity corer (Kiel type); Paleoenvironmental Reconstructions from Marine Sediments @ AWI; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS16; PS16/311; PS1768-8; PS2498-1; PS28; PS28/304; Shona Ridge; SL; South Atlantic Ocean; SPP1158 |
| url | https://doi.org/10.1594/PANGAEA.734967 |