Abiotic synthesis of graphitic carbons in the Eoarchean Saglek-Hebron metasedimentary rocks
Zixiao Guo,
Dominic Papineau,
Jonathan O’Neil
et al.
Abstract:Graphite in metasedimentary rocks of the Eoarchean Saglek-Hebron Gneiss Complex (Canada) is depleted in 13C and has been interpreted as one of the oldest traces of life on Earth. The variation in crystallinity of this oldest graphitic carbon could possibly confirm the effect of metamorphism on original biomass, but this is still unexplored. Here, we report specific mineral associations with graphitic carbons that also have a range of crystallinity in the Saglek-Hebron metasedimentary rocks. Petrographic, geoch… Show more
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