Neoproterozoic tectonic and magmatic episodes in the NW sector of Borborema Province, NE Brazil, during assembly of Western Gondwana

Santos, Ticiano José Saraiva dos; Fetter, Allen H.; Hackspacher, Peter Christian; Schmus, W. R. Van; Neto, José de Araújo Nogueira

doi:10.1016/j.jsames.2007.05.006

Cited by 79 publications

(82 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We may compare the geological data of the granulitic rocks of Porangatu with those of Porto Nacional to the north , and the Cariré Granulite Belt in northwestern Ceará (Gorayeb & Abreu 1989, Santos et al 2008a, 2008b. The structural and geochronological characteristics are very similar and reveal an intimate association with TBL, which can be interpreted as representing lower portions (roots) of the Tocantins Orogen at 570 -580 Ma.…”

Section: Discussionmentioning

confidence: 97%

Granulite-facies metamorphism at ca. 570-580 Ma in the Porangatu Granulite Complex, central Brazil: implications for the evolution of the Transbrasiliano Lineament

et al. 2017

View full text Add to dashboard Cite

ABSTRACT:The Porangatu Granulite Complex is exposed in the central part of the Neoproterozoic Tocantins province in central Brazil, along the boundary between the Brasília Belt to the east and the Araguaia Belt to the west. This is part of the transcontinental Transbrasiliano-Kandi shear system. The complex includes garnet-rich enderbite and charnockite, high-grade gneisses as well as lenses of garnet-bearing mafic granulite or amphibolites, and in situ anatectic charnockite, elongated in the NNE-SSW direction along the Talismã Shear Zone (TSZ). These rocks represent suites of ortho-derived rocks of calc-alkaline affinity and small contributions of tholeiitic basalts and aluminous paragneisses. The structural framework records thrust components probably related to the early stages of an oblique collision during the evolution of Neoproterozoic Brasiliano orogens, and can be understood as involving a collisional system of two crustal blocks, initially with thrust components which in its final stage evolved to a transcurrent system with dextral movement. This led to intense imbrication, generation of mylonitic foliation, stretching lineation, tectonic banding and rotation of structures and minerals. The heterogeneous and progressive ductile deformation was accompanied by metamorphic re-equilibrium in late Neoproterozoic time. Granulite facies conditions reached a metamorphic maximum at temperature and pressure above 850°C and 10 kbar, in an almost anhydrous environment, with or without anatexis. Zircon U-Pb SHRIMP analyses for two selected rock samples indicated the combined age of 580 ± 7 Ma for a charnockite and 548 ± 48 Ma for a mafic granulite from which the charnockite is throught to have been derived. The mafic granulite contains zircon grains of ca. 2.1 Ga, indicating Paleoproterozoic igneous protoliths involved in Neoproterozoic high-grade metamorphism. In addition, older inherited zircon grains of ca.

show abstract

Section: Discussionmentioning

confidence: 97%

Granulite-facies metamorphism at ca. 570-580 Ma in the Porangatu Granulite Complex, central Brazil: implications for the evolution of the Transbrasiliano Lineament

et al. 2017

View full text Add to dashboard Cite

show abstract

“…The Meruoca pluton is one of the largest A-type late-Brasiliano intrusions emplaced at around 523 Ma in the Ceara Province of northeastern Brazil (Santos et al, 2008). According to Sial et al (1981), this pluton is made of granites and quartz-syenites.…”

Section: Meruoca Granite (Brazil)mentioning

confidence: 99%

Hydrothermally-induced changes in mineralogy and magnetic properties of oxidized A-type granites

Nédélec

Trindade

Peschler

et al. 2015

Lithos

View full text Add to dashboard Cite

“…Some limestone caves where the wasp nests were collected (Bonita, Vai e Vem, Uropygi, and Lapa do Bode caves) are associated to the Bambuí Group metamorphic rocks, dating from the Neoproterozoic (Chaves et al, 2007). Gruta do Mocó is associated to the Neoproterozoic Ubajara Group rocks (Santos et al, 2008) and the Córrego Verde cave is on the Mesoproterozoic Rio Pardo Grande Group rocks (Santos et al, 2004).…”

Section: P R O V a Smentioning

confidence: 99%

Occurrence and analysis of borings made by solitary wasp in caves: a study in cave ichnology

Bonito¹,

Ferreira²,

Marinho³

2011

Rev. bras. paleontol.

View full text Add to dashboard Cite

-The present study investigated entire or partially lithified nests of solitary wasps found in caves in the Brazilian states of São Paulo, Minas Gerais, Goiás, Mato Grosso, Ceará and Bahia. The width and depth of the individual cells, as well as the length, width and height of each nest were measured, and the morphology analyzed. The volumes of the nests from Altinópolis (São Paulo State) were calculated, and the total number of cells was counted. Four different morphological patterns were found for the nests. Many of the nests show evidences of reoccupation by other wasps, even when preservation was already in progress, being both contemporary and older reoccupation patterns observed. Important processes of preservation observed were encrustation and lithification of the original nest material, with the pattern of alteration apparently depending on the location of the nest while exposed to percolating mineral-containing waters. Permineralization was, however, also observed in some of the cells.

show abstract

Neoproterozoic tectonic and magmatic episodes in the NW sector of Borborema Province, NE Brazil, during assembly of Western Gondwana

Cited by 79 publications

References 40 publications

Granulite-facies metamorphism at ca. 570-580 Ma in the Porangatu Granulite Complex, central Brazil: implications for the evolution of the Transbrasiliano Lineament

Granulite-facies metamorphism at ca. 570-580 Ma in the Porangatu Granulite Complex, central Brazil: implications for the evolution of the Transbrasiliano Lineament

Hydrothermally-induced changes in mineralogy and magnetic properties of oxidized A-type granites

Occurrence and analysis of borings made by solitary wasp in caves: a study in cave ichnology

Contact Info

Product

Resources

About