Stable chlorine isotope data, used in conjunction with other geochemical parameters, are useful in determining the origin of solute in formation waters with salinity different from that of seawater. Jurassic salt in the ...
The whole-rock δ18O of mudrocks, as well as the δ18O of the clay-sized silicate fraction, does not change in any systematic manner over Paleozoic and late Proterozoic time. Therefore, the δ18O of the ocean has not changed ...