Abstract
The results of thermodynamic calculations demonstrate that the pH and Eh values for bottom sea water enriched in organic matter tend to decrease drastically as a result of bacterial reduction of sulfates in sea water. Syngenetic sulfide ore beds associated with the Jiashengpan strata-bound Pb-Zn-S ore deposit are believed to have been precipitated under the conditions of pH varying from 7.08 to 7.17 and Eh from −0.232 to −0.418V. It is established that in the reducing system in sea water where reduction of sulfates by anaerobic bacteria took place, paleosalinity is an important factor affecting pH and Eh changes and controlling the formation of sulfide ore beds. The present study shows that the quantitative evaluation of physicochemical conditions can be effected from thermodynamic calculations on the basis of geochemical data.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
