Rare earth elements of modern seeps from the Gulf of Mexico, the Black Sea, and the Congo Fan
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2013
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| _version_ | 1867169511338147840 |
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| author | Feng, Dong Lin, Zhijia Bian, Y Chen, Duofu Peckmann, Jörn Bohrmann, Gerhard Roberts, Harry H |
| author_facet | Feng, Dong Lin, Zhijia Bian, Y Chen, Duofu Peckmann, Jörn Bohrmann, Gerhard Roberts, Harry H |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | At marine seeps, methane is microbially oxidized resulting in the precipitation of carbonates close to the seafloor. Methane oxidation leads to sulfate depletion in sediment pore water, which induces a change in redox conditions. Rare earth element (REE) patterns of authigenic carbonate phases collected from modern seeps of the Gulf of Mexico, the Black Sea, and the Congo Fan were analyzed. Different carbonate minerals including aragonite and calcite with different crystal habits have been selected for analysis. Total REE content (SumREE) of seep carbonates varies widely, from 0.1 ppm to 42.5 ppm, but a common trend is that the SumREE in microcrystalline phases is higher than that of the associated later phases including micospar, sparite and blocky cement, suggesting that SumREE may be a function of diagenesis. The shale-normalized REE patterns of the seep carbonates often show different Ce anomalies even in samples from a specific site, suggesting that the formation conditions of seep carbonates are variable and complex. Overall, our results show that apart from anoxic, oxic conditions are at least temporarily common in seep environments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_834248 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Rare earth elements of modern seeps from the Gulf of Mexico, the Black Sea, and the Congo Fan Feng, Dong Lin, Zhijia Bian, Y Chen, Duofu Peckmann, Jörn Bohrmann, Gerhard Roberts, Harry H Center for Marine Environmental Sciences; MARUM At marine seeps, methane is microbially oxidized resulting in the precipitation of carbonates close to the seafloor. Methane oxidation leads to sulfate depletion in sediment pore water, which induces a change in redox conditions. Rare earth element (REE) patterns of authigenic carbonate phases collected from modern seeps of the Gulf of Mexico, the Black Sea, and the Congo Fan were analyzed. Different carbonate minerals including aragonite and calcite with different crystal habits have been selected for analysis. Total REE content (SumREE) of seep carbonates varies widely, from 0.1 ppm to 42.5 ppm, but a common trend is that the SumREE in microcrystalline phases is higher than that of the associated later phases including micospar, sparite and blocky cement, suggesting that SumREE may be a function of diagenesis. The shale-normalized REE patterns of the seep carbonates often show different Ce anomalies even in samples from a specific site, suggesting that the formation conditions of seep carbonates are variable and complex. Overall, our results show that apart from anoxic, oxic conditions are at least temporarily common in seep environments. |
| title | Rare earth elements of modern seeps from the Gulf of Mexico, the Black Sea, and the Congo Fan |
| topic | Center for Marine Environmental Sciences; MARUM |
| url | https://doi.org/10.1594/PANGAEA.834248 |