ELSI

Research & Activities

ELSI Seminar

ELSI Seminar

Speaker
Dr. Martin Schoell (GasConsult International Inc.)
Date
November 8, 2017
Time
15:30
Room

ELSI-1 Building - ELSI Hall

Title:
Archean Life in a volcanic-hydrothermal environment

Speaker: Dr. Martin Schoell (GasConsult International Inc.)


Abstract:
The Archean 2.7Ga Abitibi volcanic belt has many locations where organic kerogenous/graphitic carbon is preserved. Carbon isotope values of -45‰ have been interpreted to result from incorporation of 13C-depleted CO2 that is derived from methane oxidation. New analyses found in the whole Abitibi complex variations from -20 to -45‰ and even in one location variations of 8‰ which are very difficult to interpret. Three models will be discussed
1) Yellowstone model: pCO2 controlled variations
2) Various degrees of methane oxidation
3) Florida seep model: Mixing of methane-derived organic matter with background carbon.
All models are unsatisfactory, each for different reasons.