Cycling of Fe by siderophilic cyanobacteria: Implications for an early biosphere Brown, I. ; Thomas-Keprta, K. ; Sarkisova, S. ; Clarke, W. ; Fischer, C. ; Luttge, A. ; Arvidson, R. ; Shen, G. ; Bryant, D. ; Galindo, C. ; Garrison, D. ; McKay, D. S. Abstract Publication: Geochimica et Cosmochimica Acta Supplement Pub Date: June 2009 Bibcode: 2009GeCAS..73R.163B