A palaeoecological model for the late Mesoproterozoic – early Neoproterozoic Atar/El Mreïti Group, Taoudeni Basin, Mauritania, northwestern Africa
| Autor: | Nur Gueneli, Emmanuelle Javaux, Jochen J. Brocks, Jérémie Beghin, Simon W. Poulton, Jean-Yves Storme, Romain Guilbaud, Christian Blanpied |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
geography
geography.geographical_feature_category Taphonomy 010504 meteorology & atmospheric sciences Proterozoic Geology Context (language use) 15. Life on land Structural basin Sedimentary basin 010502 geochemistry & geophysics 01 natural sciences Incertae sedis Paleontology 13. Climate action Geochemistry and Petrology Paleoecology 14. Life underwater Microbial mat 0105 earth and related environmental sciences |
| ISSN: | 0301-9268 |
| Popis: | Reconstructing the spatial distribution of early eukaryotes in palaeoenvironments through Proterozoic sedimentary basins provides important information about their palaeoecology and taphonomic conditions. Here, we combine the geological context and a reconstruction of palaeoenvironmental redox conditions (using iron speciation) with quantitative analysis of microfossil assemblages (eukaryotes and incertae sedis), to provide the first palaeoecological model for the Atar/EI Mreiti Group of the Taoudeni Basin. Our model suggests that in the late Mesoproterozoic early Neoproterozoic, the availability of both molecular oxygen and nutrients controlled eukaryotic diversity, higher in oxic shallow marginal marine environments, while coccoidal colonies and benthic microbial mats dominated respectively in anoxic iron-rich and euxinic waters during marine highstands or away from shore where eukaryotes are lower or absent. |
| Databáze: | OpenAIRE |
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