Oil carbon dating

24 Jun

(This research is part of the "Old Carbon Project" funded by the U. National Science Foundation's Particle and Nuclear Astrophysics Program and also by Canada's Natural Science and Engineering Research Council. The team will be presenting results to date this September at the 9th International Conference on Accelerator Mass Spectrometry in Japan.) Finally, I did also get a copy of David Lowe's 1989 Radiocarbon paper. A summary: (1) old coal often has a little more C by radioactive decay. Here we describe a unique subsurface microbial community in which hydrogen-consuming, methane-producing Archaea far outnumber the Bacteria. It has been proposed, on the basis of geochemical and thermodynamic considerations, that geologically derived hydrogen might support subsurface microbial communities on Mars and Europa in which methanogens form the base of the ecosystem.

More than 90% of the 16S ribosomal DNA sequences recovered from hydrothermal waters circulating through deeply buried igneous rocks in Idaho are related to hydrogen-using methanogenic microorganisms. on the Applications of Accelerators in Research and Industry, J. On subterranean bacteria: "Deep life in the slow, slow lane." Richard A. More about subterranean bacteria: "A hydrogen-based subsurface microbial community dominated by methanogens." 2002. A new species of bacteria found in deep, hot fossil fuels: "Isolation and characterization of Thermococcus sibiricus sp. from a Western Siberia high-temperature oil reservoir." 2001. These results demonstrate that hydrogen-based methanogenic communities do occur in Earth's subsurface, providing an analogue for possible subsurface microbial ecosystems on other planets.