Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/118847
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Type: Journal article
Title: Dynamic interaction between basin redox and the biogeochemical nitrogen cycle in an unconventional proterozoic petroleum system
Author: Cox, G.
Sansjofre, P.
Blades, M.
Farkas, J.
Collins, A.
Citation: Scientific Reports, 2019; 9(1):5200-1-5200-11
Publisher: Springer Nature
Issue Date: 2019
ISSN: 2045-2322
2045-2322
Statement of
Responsibility: 
Grant M. Cox, Pierre Sansjofre, Morgan L. Blades, Juraj Farkas, Alan S. Collins
Abstract: 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, δ¹⁵N, δ¹³C and molybdenum are explained by the feedback between high levels of primary productivity, basin redox and the biogeochemical nitrogen cycle. These factors are important in constraining productivity in the marine biosphere, the development of Precambrian hydrocarbon source rocks, and more generally in understanding oxygenation of the ocean and atmosphere through earth history; as all are ultimately related to organic carbon burial.
Rights: © The Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
RMID: 0030112541
DOI: 10.1038/s41598-019-40783-4
Grant ID: http://purl.org/au-research/grants/arc/LP160101353
Published version: https://www.nature.com/articles/s41598-019-40783-4
Appears in Collections:Geology & Geophysics publications

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