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1. Isótopos de carbono em filitos carbonosos da sequência metavulcano-sedimentar Marmeleiro, Sul de Ibaré, Rio Grande do Sul
Carbon isotope ratios for carbonaceous material in the graphite prospect of Marmeleiro Sequence, southwestern of the Sul-rio-grandense Shield, have been determined. The results are approximately constant with d13C-values between -27 and -24 per mil. These values suggest that the studied carbonaceous rocks were formed from syngenetic organic detritus, which w
Publicado em: 2010