商品簡介
The Sergipana fold belt, geotectonically located between the south of the Pernambuco-Alagoas domain and the north-eastern limit of the S緌 Francisco Craton, is made up of several tectono-stratigraphic domains: Est滱cia Vaza Barris, Macurur? Maranc?Po蔞 Redondo and Canind?domains. The Canind?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 Canind?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 Jacar?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.
