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Graphite preserved in ancient mountain belts linked to supercontinent assembly

Nature Geoscience volume 17, pages 959–960 (2024)Cite this article

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This study investigates the history of graphitic carbon in two ancient North American mountain belts related to Nuna supercontinent assembly. Using rhenium–osmium and uranium–lead dating, the research reveals that biogenic graphite was hydrothermally remobilized in shear zones during late orogenesis, indicating periodic carbon cycling over 200 million years.

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Fig. 1: Ages of graphite recovered from two North American orogens.

References

  1. Condie, K. C., Des Marais, D. J. & Abbott, D. Precambrian superplumes and supercontinents: a record in black shales, carbon isotopes, and paleoclimates? Precambrian Res. 106, 239–260 (2001). This paper reports the widespread burial of organic carbon during the Palaeoproterozoic.

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This is a summary of: Toma, J. et al. Nuna supercontinent assembly linked to carbon cycling in shear zones 1.9–1.7 billion years ago. Nat. Geosci. https://doi.org/10.1038/s41561-024-01519-w (2024).

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Graphite preserved in ancient mountain belts linked to supercontinent assembly. Nat. Geosci. 17, 959–960 (2024). https://doi.org/10.1038/s41561-024-01533-y

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