O2 constraints from Paleoproterozoic detrital pyrite and uraninite Johnson, J. E. ; Gerpheide, A. ; Lamb, M. P. ; Fischer, W. W. Abstract Publication: Geological Society of America Bulletin Pub Date: May 2014 DOI: 10.1130/B30949.1 Bibcode: 2014GSAB..126..813J