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| Cox, Grant M.; Sansjofre, Pierre; Blades, Morgan L.; Farkas, Juraj; Collins, Alan S.. |
| Precambrian hydrocarbons and their corresponding source rocks are distinctly different from their Phanerozoic counterparts, having been deposited in persistently anoxic environments in ecosystems dominated by bacteria. Here, we show that cyclic enrichment of organic matter in the world's oldest hydrocarbon play (ca. 1.38 Ga), is not associated with flooding surfaces and is unrelated to variations in mineralogy or changes in the relative rate of clastic to biogenic sedimentation-factors typically attributed to organic enrichment in Phanerozoic shales. Instead, the cyclic covariation of total organic carbon, delta N-15, delta C-13 and molybdenum are explained by the feedback between high levels of primary productivity, basin redox and the biogeochemical... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00637/74942/75766.pdf |
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