Comparison of oxygen fugacities of S-type granites across the Archean-Proterozoic boundary

Claire E Bucholz1, John M Eiler2, Edward M Stolper2 and Frederick B Breaks3, (1)California Institute of Technology, Pasadena, United States, (2)California Institute of Technology, Pasadena, CA, United States, (3)Consulting Geologist, Sudbury, ON, Canada