Stable light isotope biogeochemistry of hydrothermal systems.

  title={Stable light isotope biogeochemistry of hydrothermal systems.},
  author={David J Des Marais},
  journal={Ciba Foundation symposium},
  pages={83-94; discussion 94-8}
The stable isotopic composition of the elements O, H, S and C in minerals and other chemical species can indicate the existence, extent, conditions and the processes (including biological activity) of hydrothermal systems. Hydrothermal alteration of the 18O/16O and D/H values of minerals can be used to detect fossil systems and delineate their areal extent. Water-rock interactions create isotopic signatures which indicate fluid composition, temperature, water-rock ratios, etc. The 18O/16O… CONTINUE READING