Overview

The Sergipana fold belt, geotectonically located between the south of the Pernambuco-Alagoas domain and the north-eastern limit of the São Francisco Craton, is made up of several tectono-stratigraphic domains: Estância Vaza Barris, Macururé, Marancó-Poço Redondo and Canindé domains. The Canindé Domain occurs as a band in a general NE-SW direction and is bounded from the other domains by large low-angle and high-angle shear zone faults. The study area, near the town of Batalha, Alagoas, comprises a strip of metasedimentary rocks called the Araticum complex, which is part of the Canindé domain. Field work indicates that the mapped region consists of garnet-biotite schists with intercalations of marbles and quartzites, garnet-biotite paragnaises with intercalations of amphibolites and marbles, these two main lithologies being separated by the Jacaré dos Homens shear zone (ZCJH). The schists and gneisses have foliation in the vicinity of the ZCJH with dips ranging from 15° to 70° and a general NE-SW direction. The lenses of metacalcaria intercalated in the schists and paragneisses occur as lenticular bodies, consistent with the regional structuring.

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