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Compared geological evolution of Itapira and Piracaia complexes in the region situated between the cities of Lindóia and Socorro, North, and Jarinu and Cabreúva, South, São Paulo State


In the region between the towns of Lindóia and Socorro on the north and then south to the towns of Cabreuva and Jarinu two major tectonic domains are recognized: Alto Rio Grande Domain, with ages from Archean to Neoproterozoic, and Socorro Guaxupe Trust Nappe with Neoproterozoic age. The first contains the Archean rocks of the Amparo Complex, and metasediments and gneissic rocks of granitic composition of the Itapira Complex, while the second is represented by metasediments and granitic rocks of Piracaia Complex. Considering that there are doubts regarding the areas of occurrence of these domains, it is intended in this research to deepen knowledge regarding lithological units that make up the complexes of Itapira and Piracaia in the mentioned areas, detailing the geological evolution and metamorphic process and with the use of isotopic measurements, contribute to better establish an evolucionary model and raise criteria for distiguishing between them. (AU)

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(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
FARIAS DE OLIVEIRA, MARCOS AURELIO; NEGRI, FRANCISCO DE ASSIS; ZANARDO, ANTENOR; MORALES, NORBERTO. Archean and paleoproterozoic crust generation events, Amparo complex and Serra Negra orthogneiss in southern Brasilia Orogen, SE Brazil. Journal of South American Earth Sciences, v. 90, p. 137-154, . (12/17540-5)

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