35TH INTERNATIONAL GEOLOGICAL CONGRESS
27 AUGUST - 4 SEPTEMBER 2016 | CAPE TOWN, SOUTH AFRICA
Home
Field trips 
Sponsorship & expo 
Registration
Tours 
Promotion Sponsors
Keystone Sponsor
Diamond Sponsor
Gold Sponsor
Silver Sponsor
Business Centre Sponsor
Publication Sponsor
Social Function
Plenary Speaker Sponsor
Speaker Gift Sponsor
Post Graduate Fund
Registration
Welcome Drinks
Lunch Time Drinks
Publication &
35 IGC SAGPGF
35 IGC SAGPGF
35 IGC SAGPGF
MY IGC APP
Symposium Sponsor
Audit Sponsor
Partners
35TH INTERNATIONAL GEOLOGICAL CONGRESS
27 AUGUST - 4 SEPTEMBER 2016 | CAPE TOWN, SOUTH AFRICA
My IGC
Symposium Details
| Title | Description | Convenors |
|---|---|---|
| Redox texture of the Archean atmosphere and ocean | Our views on the redox state of the early Earth have gone through turmoil over last 3 decades. The paradigm of the Archean anoxic atmosphere and ocean that emerged in 1920’s and further strengthened in 1960’s was critically challenged in 1980’s and 1990’s. Studies of multiple S isotopes in Archean sulfate and sulfide minerals addressed some of the latter concerns and constrained the irreversible oxygenation of the atmosphere between ~2.45 and 2.32 Ga. Two important changes in our understanding of the early Earth’s redox evolution happened in the last decade: first, evidence for oxygenated, local or global, transient or ramping up, surface environments was discovered, and second, a model for recycling of mass-independent fractionation of sulfur isotopes after the rise of atmospheric oxygen was put forward. Both of these developments challenge our definition of the Great Oxidation Event. We invite contributions to this session that would present new data, results of modelling, or review our understanding of the redox texture in the Archean surface environments. | Andrey Bekker, Kurt Konhauser and Benjamin Eickmann |
Conference Programme 
Field trips 
Sponsorship & expo 
Volunteer 
GeoHost 
Registration
Tours 
Promotion 
Publications
