Salinity of the Eocene Arctic Ocean from oxygen isotope analysis of fish bone carbonate
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| Autores principales: | , |
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2008
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| _version_ | 1867171358990925824 |
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| author | Waddell, Lindsey M Moore, Theodore C |
| author_facet | Waddell, Lindsey M Moore, Theodore C |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Stable isotope analysis was performed on the structural carbonate of fish bone apatite from early and early middle Eocene samples (~55 to ~45 Ma) recently recovered from the Lomonosov Ridge by Integrated Ocean Drilling Program Expedition 302 (the Arctic Coring Expedition). The d18O values of the Eocene samples ranged from -6.84 per mil to -2.96 per mil Vienna Peedee belemnite, with a mean value of -4.89 per mil, compared to 2.77 per mil for a Miocene sample in the overlying section. An average salinity of 21 to 25 per mil was calculated for the Eocene Arctic, compared to 35 per mil for the Miocene, with lower salinities during the Paleocene Eocene thermal maximum, the Azolla event at ~48.7 Ma, and a third previously unidentified event at ~47.6 Ma. At the Azolla event, where the organic carbon content of the sediment reaches a maximum, a positive d13C excursion was observed, indicating unusually high productivity in the surface waters. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_733934 |
| institution | PANGAEA |
| language | en |
| publishDate | 2008 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Salinity of the Eocene Arctic Ocean from oxygen isotope analysis of fish bone carbonate Waddell, Lindsey M Moore, Theodore C 302-CompSite; ACEX; Arctic Coring Expedition, ACEX; CCGS Captain Molly Kool (Vidar Viking); COMPCORE; Composite Core; Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP Stable isotope analysis was performed on the structural carbonate of fish bone apatite from early and early middle Eocene samples (~55 to ~45 Ma) recently recovered from the Lomonosov Ridge by Integrated Ocean Drilling Program Expedition 302 (the Arctic Coring Expedition). The d18O values of the Eocene samples ranged from -6.84 per mil to -2.96 per mil Vienna Peedee belemnite, with a mean value of -4.89 per mil, compared to 2.77 per mil for a Miocene sample in the overlying section. An average salinity of 21 to 25 per mil was calculated for the Eocene Arctic, compared to 35 per mil for the Miocene, with lower salinities during the Paleocene Eocene thermal maximum, the Azolla event at ~48.7 Ma, and a third previously unidentified event at ~47.6 Ma. At the Azolla event, where the organic carbon content of the sediment reaches a maximum, a positive d13C excursion was observed, indicating unusually high productivity in the surface waters. |
| title | Salinity of the Eocene Arctic Ocean from oxygen isotope analysis of fish bone carbonate |
| topic | 302-CompSite; ACEX; Arctic Coring Expedition, ACEX; CCGS Captain Molly Kool (Vidar Viking); COMPCORE; Composite Core; Exp302; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP |
| url | https://doi.org/10.1594/PANGAEA.733934 |