Navegação Ciências Exatas e da Terra por Autor "Hartmann, Leo Afraneo"
Resultados 1-7 de 7
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Distinção entre textura spinifex e arranjos de olivina metamórfica
Hartmann, Leo Afraneo; Remus, Marcus Vinicius Dorneles; Koppe, Jair Carlos (1987) [Artigo de periódico]Elongated blades of olivine in a talc-carbonate (or sulphide) matrix are form ed by me - tamorphi c processes from serpentinites, and have been misidentifi ed as igneous spinifex texrures. The two types may be dislinguished ... -
Geoquímica de rochas metabasálticas da mina da Palma, Bloco São Gabriel, escudo sul-rio-grandense: um possível platô oceânico
Lopes, Angela Pacheco; Hartmann, Leo Afraneo (2003) [Artigo de periódico]The Mina da Palma oceanic plateau is described for the first time in the São Gabriel Block, southern Brazilian Shield. It is composed mostly of metabasalts, marbles and metachert. Two deformational events are recognized ... -
Ion microproble (SHRIMP) dates complex granulite from Santa Catarina, southern Brazil
Hartmann, Leo Afraneo; Santos, João Orestes Schneider; McNaughton, Neal Jesse; Vasconcellos, Marcos Antonio Zen; Silva, Luiz Carlos da (2000) [Artigo de periódico]Complex polymetamorphic granulites have been dated in the Santa Catarina granulite complex of southern Brazil through SHRIMP study of zircon. This complex is dominated by intermediate-acid plutonic rocks and contains small ... -
Metamorphic evolution and U-Pb zircon SHRIMP geochronology of the Belizário ultramafic amphibolite, Encantadas Complex, southernmost Brazil
Hartmann, Leo Afraneo; Santos, João Orestes Schneider; Leite, Jayme Alfredo Dexheimer; Porcher, Carla Cristine; McNaughton, Neal Jesse (2003) [Artigo de periódico]O entendimento dos processos evolutivos do Complexo Encantadas no sul do Brasil foi aperfeiçoado através do estudo integrado do metamorfismo de um anfibolito ultramáfico e da geocronologia U-Pb SHRIMP de zircão. Os núcleos ... -
Mid amphibolite facies metamorphism of harzburgites in the Neoproterozoic Cerro Mantiqueiras Ophiolite, southernmost Brazil
Hartmann, Leo Afraneo; Chemale Junior, Farid (2003) [Artigo de periódico]Valuable information is retrieved from the integrated investigation of the field relationships, microstructure and mineral compositions of harzburgites from the Neoproterozoic Cerro Mantiqueiras Ophiolite. This important ... -
SHRIMP U-Pb zircon dating of Pedras Grandes Suite, southern Santa Catarina State, Brazil
Jelinek, Andrea Ritter; Bastos Neto, Artur Cezar; Leite, Jayme Alfredo Dexheimer; Hartmann, Leo Afraneo; McNaughton, Neal Jesse (2005) [Artigo de periódico]Dois dos principais pulsos da atividade granítica no Batólito Florianópolis em Santa Catarina ocorreram entre 613±5 Ma e 595±5 Ma, durante o Neoproterozóico do Ciclo Brasiliano. Estas idades foram obtidas a partir de ... -
Structural evolution and tectonic setting of the Porongos belt, southern Brazil
Saalmann, Kerstin; Remus, Marcus Vinicius Dorneles; Hartmann, Leo Afraneo (2006) [Artigo de periódico]The SW–NE-striking Porongos belt, located between juvenile Neoproterozoic rocks in the west and the Dom Feliciano belt, characterized by intense reworking of older crust, in the east, comprises a greenschist to amphibolite-facies ...