Análise Palinoestratigráfica dos Depósitos Permianos (Poços HN-05-RS E HN-25-RS) do sul da Bacia do Paraná

Abstract

Abstract. PALYNOSTRATIGRAPHIC ANALYSIS OF PERMIAN DEPOSITS (HN-05-RS AND HN-25-RS BOREHOLES) FROM SOUTHERN PARANA BASIN. This paper presents the palynological results obtained from 133 levels of the HN-05-RS and HN-25-RS wells, drilled in Hulha Negra, southern portion of Rio Grande do Sul State. The sampled levels included the Permian units of the Gondwana I Supersequence (Itarare Group and Rio Bonito, Palermo, Irati, Serra Alta, Teresina and Rio do Rasto formations) from Parana Basin, Brazil. A total of 133 palynomorph species were recorded, corresponding to spores (57), pollen grains (65), besides microplanktonic elements and fungi (11). The stratigraphic distribution of all taxa is presented, as well as the relative frequency of selected levels. The analysis allowed the recovery of palynological associations relatively diverse and abundant from the overlying levels of the Irati Formation, which were generally considered sterile. The associations are related to Vittatina costabilis (Asselian to middle A...