scholarly journals The Rio Piranhas-Seridó Domain, Borborema Province, Northeastern Brazil: Review of geological-geochronological data and implications for stratigraphy and crustal evolution

2021 ◽  
Vol 4 (3) ◽  
pp. 179-207
Author(s):  
Vladimir Medeiros ◽  
◽  
Rogério Cavalcante ◽  
Frank Santos ◽  
Joseneusa Rodrigues ◽  
...  
Keyword(s):  
Northeastern Brazil ◽  
Crustal Evolution ◽  
Geochronological Data ◽  
Borborema Province

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

scholarly journals U-PB AND SM-ND GEOCHRONOLOGICAL CONSTRAINTS ON THE CRUSTAL EVOLUTION AND BASEMENT ARCHITECTURE OF CEARÁ STATE, NW BORBOREMA PROVINCE, NE BRAZIL: IMPLICATIONS FOR THE EXISTENCE OF THE PALEOPROTEROZOIC SUPERCONTINENT "ATLANTICA"

2000 ◽  
Vol 30 (1) ◽  
pp. 102-106 ◽  
Author(s):  
ALLEN HUTCHESON FETTER ◽  
WILLIAM RANDALL VAN SCHMUS ◽  
TICIANO JOSÉ SARAIVA DOS SANTOS ◽  
JOSÉ ARAUJO NOGUEIRA NETO ◽  
MICHEL HENRI ARTHAUD
Keyword(s):  
Crustal Evolution ◽  
Borborema Province ◽  
Geochronological Constraints

scholarly journals Lithospheric and sublithospheric deformation under the Borborema Province of northeastern Brazil from receiver function harmonic stripping

Solid Earth ◽  
2019 ◽  
Vol 10 (3) ◽  
pp. 893-905 ◽  
Author(s):  
Gaelle Lamarque ◽  
Jordi Julià
Keyword(s):  
Lithospheric Mantle ◽  
Seismic Anisotropy ◽  
Receiver Function ◽  
Seismic Station ◽  
Atlantic Coast ◽  
Shear Zones ◽  
Receiver Functions ◽  
Azimuthal Anisotropy ◽  
Northeastern Brazil ◽  
Borborema Province

Abstract. The depth-dependent anisotropic structure of the lithosphere under the Borborema Province in northeast Brazil has been investigated via harmonic stripping of receiver functions developed at 39 stations in the region. This method retrieves the first (k=1) and second (k=2) degree harmonics of a receiver function dataset, which characterize seismic anisotropy beneath a seismic station. Anisotropic fabrics are in turn directly related to the deformation of the lithosphere from past and current tectonic processes. Our results reveal the presence of anisotropy within the crust and the lithospheric mantle throughout the entire province. Most stations in the continental interior report consistent anisotropic orientations in the crust and lithospheric mantle, suggesting a dominant northeast–southwest pervasive deformation along lithospheric-scale shear zones developed during the Brasiliano–Pan-African orogeny. Several stations aligned along a northeast–southwest trend located above the (now aborted) Mesozoic Cariri–Potiguar rift display large uncertainties for the fast-axis direction. This non-azimuthal anisotropy may be related to a complex anisotropic fabric resulting from a combination of deformation along the ancient collision between Precambrian blocks, Mesozoic extension and thermomechanical erosion dragging by sublithospheric flow. Finally, several stations along the Atlantic coast reveal depth-dependent anisotropic orientations roughly (sub)perpendicular to the margin. These results suggest a more recent overprint, probably related to the presence of frozen anisotropy in the lithosphere due to stretching and rifting during the opening of the South Atlantic.

Geochronological data from TTG-type rock associations of the Arroio dos Ratos Complex and implications for crustal evolution of southernmost Brazil in Paleoproterozoic times

2015 ◽  
Vol 57 ◽  
pp. 49-60 ◽  
Author(s):  
Tiago Rafael Gregory ◽  
Maria de Fátima Bitencourt ◽  
Lauro Valentim Stoll Nardi ◽  
Luana Moreira Florisbal ◽  
Farid Chemale
Keyword(s):  
Crustal Evolution ◽  
Geochronological Data

Petrogenesis and Geochronology of the late-Archean Na-rich A Type granite from the Bundelkhand Craton, India: Implication for tectonic and crustal evolution

2020 ◽  
Author(s):  
Mohd Baqar Raza ◽  
Fernando Corfu ◽  
Pritam Nasipuri
Keyword(s):  
High Pressure ◽  
Iron Formation ◽  
Crustal Evolution ◽  
Geochronological Data ◽  
Banded Iron Formation ◽  
Emplacement Temperature ◽  
Eu Anomaly ◽  
Type Granite ◽  
High Silica ◽  
Concordia Diagram

<p>Tonalite-trondhjemite-granodiorite gneisses (TTG) are the oldest litho-units of the Bundelkhand craton. The supracrustal rocks include variable deformed mafic volcanics and Banded Iron Formation. Magmatic zircons from the TTG’s yield an upper intercept of ~ 3590 Ma. The TTG’s gradually grades to a Na-feldspar rich A type porphyric granite towards the south. In this abstract, we report mineralogical, geochemical, and geochronological information of high silica- low Ca - high Na A-type granite from Bundelkhand craton.</p><p>In the TAS diagram, the studied samples plot in the field of granite and have a metaluminous affinity with high Ga/Al and Ce + Y + Nb + Zr values typical of A-type granites. In a primitive normalized multi-element spider diagram, the studied samples exhibit negative Nb, Ti, and P anomalies characteristics of a subduction zone setting. The chondrite normalized REE’s exhibit a strong fractionated pattern with negative Eu anomaly; the LREE are enriched and the HREE depleted with moderate to high (La/Yb)<sub>CN </sub>ratios ranging from 11.12 to 26.24 ppm. The studied samples have plagioclase compositions that vary from X<sub>Ab </sub>= 0.980-0.997 and chlorite compositions varying from X<sub>Mg </sub>= 0.309-0.469.</p><p>Phase equilibria modeling yield an emplacement temperature of 700-750<sup>O</sup>C, at 1.0 GPa. Most of the zircon grains are prismatic with visible cores and rims in optical examinations. In a U-Pb concordia diagram, the grains yield an upper intercept of 2536.6 ± 1.8 Ma. The geochemical and geochronological data taken together, indicate the Na-rich A-type granite generated by the high temperature and high-pressure partial melting of Archaean supracrustal rocks.</p>

Isotope geochemistry of Paleoproterozoic metacarbonates from Itatuba, Borborema Province, Northeastern Brazil: Evidence of marble melting within a collisional suture

2013 ◽  
Vol 23 (1) ◽  
pp. 380-389 ◽  
Author(s):  
Roberto Ventura Santos ◽  
Edilton J. dos Santos ◽  
João Adauto de Souza Neto ◽  
Luis Christian Montreuil Carmona ◽  
Alcides Nóbrega Sial ◽  
...  
Keyword(s):  
Isotope Geochemistry ◽  
Northeastern Brazil ◽  
Borborema Province

Electromagnetic Induction Studies in the Borborema Province and Adjacent Terrains, Northeastern Brazil: 2013-INCTET Progress Report

2013 ◽  
Author(s):  
Ícaro Vitorello ◽  
Antonio L. Padilha ◽  
A.C.L. Santos ◽  
Marcelo B. de Pádua ◽  
Sérgio L. Fontes ◽  
...  
Keyword(s):  
Electromagnetic Induction ◽  
Progress Report ◽  
Northeastern Brazil ◽  
Borborema Province

Intralithospheric differentiation and crustal growth: Evidence from the Borborema province, northeastern Brazil

Geology ◽  
2000 ◽  
Vol 28 (6) ◽  
pp. 519 ◽  
Author(s):  
Sérgio P. Neves ◽  
Gorki Mariano ◽  
Ignez P. Guimarães ◽  
Adejardo F. da Silva Filho ◽  
Silvana C. Melo
Keyword(s):  
Northeastern Brazil ◽  
Crustal Growth ◽  
Borborema Province

Magnetotelluric evidence for a Rhyacian suture zone hidden underneath the Seridó belt, Borborema Province, Northeastern Brazil

2021 ◽  
Vol 365 ◽  
pp. 106413
Author(s):  
Antonio L. Padilha ◽  
Andrea C.L. Santos-Matos ◽  
Joelson C. Batista ◽  
Ícaro Vitorello ◽  
Marcelo B. Pádua ◽  
...  
Keyword(s):  
Suture Zone ◽  
Northeastern Brazil ◽  
Borborema Province
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