Evidence For Biogenic Graphite In Early Archaean Isua Metasedimentary Rocks

[Oxytropidoceras]

Ohtomo,Y., T. Kakegawa, A. Ishida, T. Nagase and
M. T. Rosing, 2014, Evidence for biogenic graphite
in early Archaean Isua metasedimentary rocks.
Nature Geoscience vol. 7, pp. 25–28. doi:10.1038/ngeo2025
http://www.nature.com/ngeo/journal/v7/n1/full/ngeo2025.html

Some related papers:

van Zuilen, M. A., A. Lepland, J. Teranes, J. Finarelli,
M. Wahlen, and G. Arrhenius, 2003, Graphite and
carbonates in the 3.8 Ga old Isua Supracrustal Belt,
southern West Greenland. Precambrian Research.
vol. 126, pp. 331–348.
http://www.arrhenius.ucsd.edu/pub/Precambrian.pdf
http://www.arrhenius.ucsd.edu/Publications.html

Lepland, A., G. Arrhenius and D. Cornell, 2002, Apatite
in early Archean Isua supracrustal rocks, southern West
Greenland: its origin, association with graphite and
potential as a biomarker, Precambrian Research, 118, 221-241
http://www.arrhenius.ucsd.edu/pub/apatite2002.pdf
http://www.arrhenius.ucsd.edu/Publications.html

Yours,

Paul H.

[Auspex]

Oh, my, the chemists have been hard at work! I hope the theory survives review, and they can keep pushing the limits.