Ion microprobe (SHRIMP) dates complex granulite from Santa Catarina, southern Brazil

Hartmann, Léo Afrâneo; Santos, João Orestes Schneider; McNaughton, Neal J.; Vasconcellos, M.A.Z.; Dasilva, Luiz C.

doi:10.1590/s0001-37652000000400007

Cited by 41 publications

(19 citation statements)

References 28 publications

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“…Metamorphism at the middle crust Pb-Pb, Rb-Sr WR isochrons, U-Pb in mineral, Sm-Nd mineral isochrons 2.10-2.00 Girardi et al (1974), Machiavelli (1991), Basei (1985), Basei et al (1998bBasei et al ( , 1999Basei et al ( , 2000, Harara (2001) Granulite-facies event Felsic granulite at the middle crust U-Pb in zircon (SHRIMP) 2.17 Hartmann et al (2000) Magmatism Intrusion of deformed granitoids U-Pb in zircon (SHRIMP) 2.25-2. 15 Siga Jr. (1995), Basei et al (2009) Granulite-facies regional metamorphism Development of orthopyroxene in many rocks U-Pb zircon, Sm-Nd mineral isochron 2.…”

Section: Tectonic Stabilizationmentioning

confidence: 99%

“…30 Siga Jr. (1995), Hartmann et al (1998) Amphibolite-facies event Felsic granulite U-Pb in zircon (SHRIMP) 2. 48 Siga Jr. (1995), Harara (2001) Magmatism Intrusion of igneous rocks Rb-Sr WR isochrons 2.60 Basei (1985), Harara (2001) Granulite-facies event middle crust felsic granulite U-Pb in zircon (SHRIMP) 2.68 Hartmann et al (1979Hartmann et al ( , 2000 Magmatism TTG igneous activity U-Pb in zircon (SHRIMP), Rb-Sr WR isochrons 2. 70 Siga Jr. (1995), Hartmann et al (2000) Mantle/crust differentiation Addition of mantle-derived material to the crust SM-Nd T DM 3.40?…”

Section: Tectonic Stabilizationmentioning

confidence: 99%

“…48 Siga Jr. (1995), Harara (2001) Magmatism Intrusion of igneous rocks Rb-Sr WR isochrons 2.60 Basei (1985), Harara (2001) Granulite-facies event middle crust felsic granulite U-Pb in zircon (SHRIMP) 2.68 Hartmann et al (1979Hartmann et al ( , 2000 Magmatism TTG igneous activity U-Pb in zircon (SHRIMP), Rb-Sr WR isochrons 2. 70 Siga Jr. (1995), Hartmann et al (2000) Mantle/crust differentiation Addition of mantle-derived material to the crust SM-Nd T DM 3.40? ; 2.8-2.7 Basei (1985), Siga Jr. (1995), Harara (2001) modern Brazilian coastline (Kaul 1984, Passarelli et al 2018.…”

Section: Tectonic Stabilizationmentioning

confidence: 99%

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Petrography and detrital zircon U-Pb geochronology of sedimentary rocks of the Campo Alegre Basin, Southern Brazil: implications for Gondwana assembly

2019

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The Campo Alegre Basin is a volcano-sedimentary sequence covering an area of about 500 km 2 , located at the northeast portion of Santa Catarina state (Brazil), and formed during the late stages of the Neoproterozoic era. Three main stratigraphic units compose this basin, the lowermost of which is the Bateias Formation, corresponding to the pre-volcanic stage. It is characterized by the fanglomeratic sediments at the basin's northern boundary, which were deposited in a fluvial environment and progressively replaced by fluvial sandstones towards the south. Poorly sorted conglomerates and breccias compound the fanglomeratic facies, which comprises angular to subrounded fragments in a matrix ranging from sand fractions to fragments larger than gravel. The ubiquitous presence of volcanogenic and metamorphic fragments in the fanglomeratic facies strongly suggests that the Piên Magmatic Arc and a volcanic manifestation coeval with the earlier stages of the basin formation were important source areas, as well as the basin basement (the Luís Alves Terrane). In this sense, geological, petrographic, and detrital zircon geochronology data are combined in order to interpret the mechanisms that had acted during the deposition of these sedimentary rocks and to constraint the maximum depositional ages of Bateias Formation at ca. ~606 Ma.

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Section: Tectonic Stabilizationmentioning

confidence: 99%

Section: Tectonic Stabilizationmentioning

confidence: 99%

Section: Tectonic Stabilizationmentioning

confidence: 99%

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Petrography and detrital zircon U-Pb geochronology of sedimentary rocks of the Campo Alegre Basin, Southern Brazil: implications for Gondwana assembly

2019

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“…O reconhecimento em campo das rochas gnáissico-granulíticas nas regiões de Morretes -PR, Serra Negra -PR e Itatins -SP (Microplaca Luis Alves setentrional), é dificultado em muitos setores devido a diferenças significativas nos aspectos composicionais e texturais, quando comparadas com as rochas da Microplaca Luis Alves meridional. sugere que esses terrenos representam um segmento da Microplaca Luis Alves "plissado" Em termos geocronológicos destacam-se os trabalhos de Girardi et al (1974), Hartmann et al (1979Hartmann et al ( , 1994Hartmann et al ( , 2000, Kaul e Teixeira (1982), Basei (1985), Basei e Teixeira (1987), Mantovani et al (1989), Machiavelli et al (1993), Siga Junior et al (1994a, 1994b, Siga , Basei et al (1998), Harara (2001) e Harara et al (2002, 2003 . No mesmo período ocorre expressivo vulcanismo no âmbito da Microplaca Luis Alves, associado a evolução das bacias de Campo Alegre, Guaratubinha e Corupá.…”

Section: Microplaca Luis Alvesunclassified

Geologia do Terreno Paranaguá

Cury¹,

Júnior²

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The Paranaguá Terrane is composed of precambrian geological units distributed in a NE-SW elongated swath, about 250 km long and 30 km wide, in south-southeastern Brazil, within the States of São Paulo (Nothern Paranaguá Terrane), Paraná and Santa Catarina (Southern Paranaguá Terrane). This terrane is constituted mainly by an igneous complex, represented by the Morro Inglês, Rio do Poço and Canavieiras-Estrela suites. The country rocks of these l.s. granites are gnaissic and gnaissic-migmatitic rocks of the São Francisco do Sul Complex and metassedimentary rocks of the Rio das Cobras Sequence. Lithochemical signatures of the Morro Inglês Suite are compatible with arc magmatic-generated granitic rocks, with high-K to shoshonitic calc-alkaline character and relatively high contents of Ba, Nb, Zr, Rb, Sr, Th and K 2 O. This pattern resembles the one observed in sin-to late-collisional environments related to mature magmatic arcs, with sources modified by crustal contamination. The Canavieiras-Estrela Suite is composed of quartz-monzodiorites, leucogranites and monzogranites, with porphyritic and inequigranular rocks, with mafics represented by biotite ± anfibole. Comparativily, the Morro Inglês Suite rocks present higher values of K 2 O and smaller values of Na 2 O than the rocks of the Canavieiras-Estrela Suite. Both suites show important variations of Ba and Sr, high values of Rb and Zr, and medium-to-high values of Nb and Y. Two distinct rock units can be individualized in the Rio do Poço Suite, based on petrographical and lithogeochemical differences. The rapakivi sienogranites characteristics are compatible with metaluminous to marginally peraluminous type A granites. Such interpretation does not seem adequate for the two-mica leucogranites in this suite, which present a marginally peraluminous character, with HREE-depleted rocks, without an Eu negative anomaly. Petrographic and, mostly, structural data suggest that the Morro Inglês, Canavieiras-Estrela and Rio do Poço suites emplacement occurred during a late stage of the collisional event. U-Pb ages (zircon) of these suites are very close and does not allow a clear separation of them. A high concentration of ages between 600-580 Ma represent the main magmatic period of the Paranaguá Terrane. Although less frequent, older ages between 620-610 Ma were obtained in the three suites, suggesting the presence of a relatively early magmatism in this terrane's evolution. U-Pb ages (zircon) obtained in crystals borders, as well as in late leucogranitic veins, are distributed between 560-480 Ma. These ages must be related with important thermotectonic events of the Cambro-Ordovician Rio Doce Orogeny. The metassedimentary rocks of the Rio das Cobras Sequence occur as elongated strips, with little areal expression. In the southern portion of the Paranaguá Terrane, green schist (biotite zone) paragenesis are present (Serra da Prata -PR), while in the central and northern portions there are afibolite facies paragenesis up to granulite facies in association with kyanite-garne...

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“…This watershed has an area of approximately 15,500 km 2 (Schettini, 2002) and drains rocks of the Luís Alves Terrane, which is a small cratonic remnant that occurs south of the Ribeira Belt . It is composed of Archaean-Paleoproterozoic orthopyroxenebearing mafic to leucocratic orthogneisses, dominantly of intermediate composition (metaenderbite, metaopdalite, metaleuconorite), metamorphosed under granulite facies conditions (Basei et al, 1998;Hartmann et al, 2000). …”

Section: Study Settingmentioning

confidence: 99%

Sensibilidade da luminescência como indicador da história térmica e deposicional do quartzo

Sawakuchi¹

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Ion microprobe (SHRIMP) dates complex granulite from Santa Catarina, southern Brazil

Cited by 41 publications

References 28 publications

Petrography and detrital zircon U-Pb geochronology of sedimentary rocks of the Campo Alegre Basin, Southern Brazil: implications for Gondwana assembly

Petrography and detrital zircon U-Pb geochronology of sedimentary rocks of the Campo Alegre Basin, Southern Brazil: implications for Gondwana assembly

Geologia do Terreno Paranaguá

Sensibilidade da luminescência como indicador da história térmica e deposicional do quartzo

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