Inverse correlation between the molybdenum and uranium isotope compositions of Upper Devonian black shales caused by changes in local depositional conditions rather than global ocean redox variations
| Autor: | Cameron Boyes, Liyan Xing, Wang Zheng, Jieying Wang, D. Jeffrey Over, Brian Kendall, Stephen J. Romaniello, Alexandra Kunert, Yvonne Bennett, Jian Liu |
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| Rok vydání: | 2020 |
| Předmět: |
geography
geography.geographical_feature_category 010504 meteorology & atmospheric sciences Isotope Isotopes of uranium Geochemistry chemistry.chemical_element 010502 geochemistry & geophysics 01 natural sciences Redox Devonian Kettle (landform) Sedimentary depositional environment chemistry 13. Climate action Geochemistry and Petrology Molybdenum Seawater 14. Life underwater Geology 0105 earth and related environmental sciences |
| Zdroj: | Geochimica et Cosmochimica Acta. 287:141-164 |
| ISSN: | 0016-7037 |
| Popis: | Coupled Mo-U isotope data from the Upper Devonian Kettle Point Formation (Ontario, Canada) provide a cautionary tale regarding interpretation of global ocean redox conditions using data from euxinic black shales. In the Gore of Chatham core, the Kettle Point black shales have high Mo concentrations (48–473 μg/g) and consistently high Mo/U ratios (≥3 times the Mo/U ratio of modern seawater), suggesting a euxinic depositional environment. These shales yield an inverse correlation (r = 0.89, p |
| Databáze: | OpenAIRE |
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