Timing of crust formation, deposition of supracrustal sequences, and Transamazonian and Brasiliano metamorphism in the East Pernambuco belt (Borborema Province, NE Brazil): Implications for western Gondwana assembly

2006 ◽  
Vol 149 (3-4) ◽  
pp. 197-216 ◽  
Author(s):  
Sérgio P. Neves ◽  
Olivier Bruguier ◽  
Alain Vauchez ◽  
Delphine Bosch ◽  
José Maurício Rangel da Silva ◽  
...  
Keyword(s):  
Crust Formation ◽  
Borborema Province ◽  
Western Gondwana Assembly

U–Pb age of the coesite-bearing eclogite from NW Borborema Province, NE Brazil: Implications for western Gondwana assembly

2015 ◽  
Vol 28 (3) ◽  
pp. 1183-1196 ◽  
Author(s):  
Ticiano José Saraiva dos Santos ◽  
Wagner da Silva Amaral ◽  
Matheus Fernando Ancelmi ◽  
Michele Zorzetti Pitarello ◽  
Reinhardt Adolfo Fuck ◽  
...  
Keyword(s):  
Borborema Province ◽  
Western Gondwana Assembly

Neoproterozoic magmatic arc volcanism in the Borborema Province, NE Brazil: possible flare-ups and lulls and implications for western Gondwana assembly

2020 ◽  
Author(s):  
Fabrício Andrade Caxito ◽  
Camila Franco Basto ◽  
Lauro Cézar Montefalco de Lira Santos ◽  
Elton Luiz Dantas ◽  
Vladimir Cruz de Medeiros ◽  
...  
Keyword(s):  
Arc Volcanism ◽  
Magmatic Arc ◽  
Borborema Province ◽  
Western Gondwana Assembly ◽  
Neoproterozoic Magmatic Arc

Unraveling sedimentary precursors and metal enrichment of high-grade metamorphosed manganese-rich rocks from the Borborema Province, northeastern Brazil

2021 ◽  
pp. 104283
Author(s):  
Felipe Holanda dos Santos ◽  
Wagner da Silva Amaral ◽  
Kurt Konhauser ◽  
Douglas Teixeira Martins ◽  
Marco Paulo de Castro ◽  
...  
Keyword(s):  
Northeastern Brazil ◽  
High Grade ◽  
Metal Enrichment ◽  
Borborema Province

Photosensitization Induced by Heterophyllaea pustulata in Goats: Sequential Development of Skin Lesions

2021 ◽  
Vol 58 (3) ◽  
pp. 568-573
Author(s):  
Juan F. Micheloud ◽  
Lluís Luján ◽  
Luis A. Colque-Caro ◽  
Susana C. Núñez-Montoya ◽  
Claudio G. Barbeito ◽  
...  
Keyword(s):  
Cell Death ◽  
Oral Dose ◽  
Skin Lesions ◽  
Crust Formation ◽  
Cutaneous Lesions ◽  
Protein Ratio ◽  
Dermal Fibrosis ◽  
Sequential Development ◽  
Treatment Changes ◽  
Skin Biopsies

Five adult Saanen goats received a single oral dose of Heterophyllaea pustulata containing 42.25 μg/kg rubiadin (anthraquinone) and 3 adult goats were untreated controls. All goats were exposed to sunlight and sequential ear skin biopsies were collected before treatment and at 32 hours, 3 days, 8 days, and 15 days after treatment. Changes at 32 hours after dosing included epidermal spongiosis, single cell death and acantholysis, an increased BAX/BCL-2 protein ratio, and dermal edema. Lesions at day 3 included epidermal and adnexal necrosis, crust formation, and acanthosis. Acanthosis, hyperkeratosis, and dermal fibrosis and neovascularization were present at day 15. The pro-apoptotic (BAX)/anti-apoptotic (BCL-2) protein ratio increased at 32 hours, whereas epidermal and dermal PCNA immunolabeling increased between days 8 and 15 after treatment. The cutaneous lesions were consistent with sunlight-induced damage, and the occurrence in treated but not control goats indicates photosensitization.

scholarly journals Decratonization by rifting enables orogenic reworking and transcurrent dispersal of old terranes in NE Brazil

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Carlos E. Ganade ◽  
Roberto F. Weinberg ◽  
Fabricio A. Caxito ◽  
Leonardo B. L. Lopes ◽  
Lucas R. Tesser ◽  
...  
Keyword(s):  
Shear Zones ◽  
Boundary Region ◽  
The North ◽  
Pan African ◽  
Juvenile Material ◽  
Oceanic Basin ◽  
Borborema Province ◽  
Isotopic Model ◽  
Late Neoproterozoic

AbstractDispersion and deformation of cratonic fragments within orogens require weakening of the craton margins in a process of decratonization. The orogenic Borborema Province, in NE Brazil, is one of several Brasiliano/Pan-African late Neoproterozoic orogens that led to the amalgamation of Gondwana. A common feature of these orogens is that a period of extension and opening of narrow oceans preceded inversion and collision. For the case of the Borborema Province, the São Francisco Craton was pulled away from its other half, the Benino-Nigerian Shield, during an intermittent extension event between 1.0–0.92 and 0.9–0.82 Ga. This was followed by inversion of an embryonic and confined oceanic basin at ca. 0.60 Ga and transpressional orogeny from ca. 0.59 Ga onwards. Here we investigate the boundary region between the north São Francisco Craton and the Borborema Province and demonstrate how cratonic blocks became physically involved in the orogeny. We combine these results with a wide compilation of U–Pb and Nd-isotopic model ages to show that the Borborema Province consists of up to 65% of strongly sheared ancient rocks affiliated with the São Francisco/Benino-Nigerian Craton, separated by major transcurrent shear zones, with only ≈ 15% addition of juvenile material during the Neoproterozoic orogeny. This evolution is repeated across a number of Brasiliano/Pan-African orogens, with significant local variations, and indicate that extension weakened cratonic regions in a process of decratonization that prepared them for involvement in the orogenies, that led to the amalgamation of Gondwana.

scholarly journals Processes of crust formation in the early Earth imaged through Hf isotopes from the East Pilbara Terrane

2017 ◽  
Vol 297 ◽  
pp. 56-76 ◽  
Author(s):  
Nicholas J. Gardiner ◽  
Arthur H. Hickman ◽  
Christopher L. Kirkland ◽  
Yongjun Lu ◽  
Tim Johnson ◽  
...  
Keyword(s):  
Hf Isotopes ◽  
Early Earth ◽  
Crust Formation

Effect of Pressure (Crust Formation) on Bread Crumb Grain Development

1998 ◽  
Vol 75 (5) ◽  
pp. 581-584 ◽  
Author(s):  
D'Anne Hayman ◽  
R. C. Hoseney ◽  
J. M. Faubion
Keyword(s):  
Grain Development ◽  
Crust Formation ◽  
Bread Crumb ◽  
Effect Of Pressure ◽  
Crumb Grain
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