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22 p, 1.9 MB Spatial and temporal evolution of hydrothermal alteration at Lavras do Sul, Brazil : Evidence from dioctahedral clay minerals / Bongiolo, Everton Marques (Universidade Federal do Rio Grande do Sul. Instituto de Geociências) ; Patrier-Mas, Patricia (Université de Poitiers) ; Mexias, André Samparo (Universidade Federal do Rio Grande do Sul. Instituto de Geociências) ; Beaufort, Daniel (Université de Poitiers) ; Laquintinie Formoso, Milton Luiz (Universidade Federal do Rio Grande do Sul. Instituto de Geociências)
The Au-Cu (±Pb, Zn, Ag) prospects of Lavras do Sul, southernmost Brazil, are hosted in Neoproterozoic granitic and volcanogenic rocks. Mineralization occurs in structurally controlled N40°W to E-W quartz veins; sericite (±chlorite) and sulfides are the main secondary minerals in associated wall rocks. [...]
2008 - 10.1346/CCMN.2008.0560207
Clays and Clay Minerals, Vol. 56, Núm. 2 (2008) , p. 222-243  

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