Paleoproterozoic high-sulfidation mineralization in the Tapajós gold province, Amazonian Craton, Brazil: geology, mineralogy, alunite argon age, and stable-isotope constraints - Juliani, Caetano; Rye, Robert O.; Nunes, Carmen M. D.; Snee, Lawrence W.; Corrêa Silva, Rafael Hernandes; Monteiro, Lena Virgínia Soares; Bettencourt, Jorge Silva; Neumann, Reiner; Alcover Neto, Arnaldo (Chemical Geology, 2005)