Questioning the biogenicity of Neoproterozoic superheavy pyrite by SIMS Cui, Huan ; Kitajima, Kouki ; Spicuzza, Michael J. ; Fournelle, John H. ; Denny, Adam ; Ishida, Akizumi ; Zhang, Feifei ; Valley, John W. Abstract Publication: American Mineralogist Pub Date: September 2018 DOI: 10.2138/am-2018-6489 Bibcode: 2018AmMin.103.1362C