scholarly journals Comment on “A preserved early Ediacaran magmatic arc at the northernmost part of the transversal zone - central domain of the Borborema Province, Northeast of South America”, by B. B. de Brito Neves et al. (2016)

2018 ◽  
Vol 48 (3) ◽  
pp. 623-630 ◽  
Author(s):  
Sérgio Pacheco Neves
Keyword(s):  
South America ◽  
Central Domain ◽  
Magmatic Arc ◽  
Borborema Province

Ordovician A-type granitoid magmatism on the Ceará Central Domain, Borborema Province, NE-Brazil

2012 ◽  
Vol 36 ◽  
pp. 18-31 ◽  
Author(s):  
Neivaldo A. Castro ◽  
Carlos E. Ganade de Araujo ◽  
Miguel A.S. Basei ◽  
Liliane S. Osako ◽  
Alan A. Nutman ◽  
...  
Keyword(s):  
Granitoid Magmatism ◽  
Central Domain ◽  
Borborema Province

scholarly journals A preserved early Ediacaran magmatic arc at the northernmost portion of the Transversal Zone central subprovince of the Borborema Province, Northeastern South America

2016 ◽  
Vol 46 (4) ◽  
pp. 491-508 ◽  
Author(s):  
Benjamim Bley de Brito Neves ◽  
◽  
Edilton José dos Santos ◽  
Reinhardt Adolfo Fuck ◽  
Lauro César Montefalco Lira Santos ◽  
...  
Keyword(s):  
Granitic Rocks ◽  
Lower Plate ◽  
Low Grade ◽  
Northeast Brazil ◽  
The South ◽  
Magmatic Arc ◽  
Continental Plate ◽  
Borborema Province ◽  
Northern Portion ◽  
Fold Belts

ABSTRACT: Magmatic arcs are an essential part of crust-forming events in planet Earth evolution. The aim of this work was to describe an early Ediacaran magmatic arc (ca. 635-580 Ma) exposed in the northernmost portion of the Transversal Zone, central subprovince of Borborema Province, northeast Brazil. Our research took advantage of several syntheses by different authors, including theses and dissertations, carried out on magmatic rocks of the study area for the last 30 years. The ca. 750 km long and up to 140 km wide arc, trending ENE-WSW, is preserved to the south of the Patos Lineament, between 35º15' and 42º30'W and 7º15' and 8ºS. About 90 different stocks and batholiths of I-type granitic rocks were mapped along this orogenic zone, preferentially intruding low-grade schists of the Cryogenian-Ediacaran Piancó-Alto Brígida (SPAB) belt. Three igneous supersuites are recognized: a) epidote-bearing granodiorites and tonalites ("Conceição" type); b) high-K calc-alkaline granites ("Itaporanga" type); c) biotite granodiorites of trondhjemite affinity ("Serrita" type). A fourth group of peralkalic and shoshonitic rocks occurs to the south of the previous ones, reflecting special tectonic conditions. NNE-SSW trending Paleoproterozoic fold belts, surrounding Archean nuclei, characterize the continental part of the northern lower plate. The oceanic fraction of this lower plate was recycled by subduction and scarce remnants of which may be seen either within the enclosing low-grade schists or as xenoliths within the arc intrusions. The upper continental plate presents WSW-ENE structural trends and is composed of Neoproterozoic fold belts and Paleoproterozoic reworked basement inliers. Available data bear clear evidence of an Ediacaran magmatic arc built at the northern portion of the Transversal Zone in the Borborema Province, northeast Brazil.

scholarly journals Reviewing the Antioquia batholith and satellite bodies: a record of Late Cretaceous to Eocene syn- to post-collisional arc magmatism in the Central Cordillera of Colombia

2018 ◽  
Vol 46 (1) ◽  
pp. 82 ◽  
Author(s):  
José Duque-Trujillo ◽  
Camilo Bustamante ◽  
Luigi Solari ◽  
Álvaro Gómez-Mafla ◽  
Gloria Toro-Villegas ◽  
...  
Keyword(s):  
South America ◽  
Arc Magmatism ◽  
South American ◽  
South American Plate ◽  
Magmatic Arc ◽  
History Of ◽  
Formation Conditions ◽  
Early Interaction ◽  
Central Cordillera ◽  
Existing Data

The Antioquia batholith represents the magmatic record of the interaction between the Farallón and Caribbean plates with the NW part of the South American Plate during the Meso-Cenozoic. Several authors have reported zircon U-Pb ages and whole rock geochemistry in order to constrain the crystallization history of this batholith and its formation conditions. The present work aims to gather the existing data with new data obtained from the Ovejas batholith and La Unión stock, both genetically related to the main intrusion. Gathering our new data with information obtained in previous works, we conclude that the Antioquia batholith was constructed by successive pulses from ca. 97 to 58 Ma in an arc-related setting. The initial pulses are related to syn-collisional tectonics, during the early interaction between the Farallón plate and NW South America. The final pulses, that record Eocene ages, are related to a post-collisional setting, similar to that recorded in other plutons of the Paleogene magmatic arc of the Central Cordillera.

Provenance of metasedimentary rocks from the Ceará Central Domain of Borborema Province, NE Brazil: implications for the significance of associated retrograded eclogites

2015 ◽  
Vol 58 ◽  
pp. 82-99 ◽  
Author(s):  
Matheus Fernando Ancelmi ◽  
Ticiano José Saraiva dos Santos ◽  
Wagner da Silva Amaral ◽  
Reinhardt Adolfo Fuck ◽  
Elton Luiz Dantas ◽  
...  
Keyword(s):  
Central Domain ◽  
Metasedimentary Rocks ◽  
Borborema Province

Review of active faults in the Borborema Province, Intraplate South America — Integration of seismological and paleoseismological data

2011 ◽  
Vol 510 (3-4) ◽  
pp. 269-290 ◽  
Author(s):  
Francisco H.R. Bezerra ◽  
Aderson F. do Nascimento ◽  
Joaquim M. Ferreira ◽  
Francisco C. Nogueira ◽  
Reinhardt A. Fuck ◽  
...  
Keyword(s):  
South America ◽  
Active Faults ◽  
Borborema Province

scholarly journals Detrital zircon record of Phanerozoic magmatism in the southern Central Andes

Geosphere ◽  
2021 ◽  
Author(s):  
T.N. Capaldi ◽  
N.R. McKenzie ◽  
B.K. Horton ◽  
C. Mackaman-Lofland ◽  
C.L. Colleps ◽  
...  
Keyword(s):  
South America ◽  
Detrital Zircon ◽  
Temporal Distribution ◽  
Arc Magmatism ◽  
Clear Trend ◽  
Isotopic Signatures ◽  
Magmatic Arc ◽  
Rough Approximation ◽  
Southern Central ◽  
Continental Magmatic Arc

The spatial and temporal distribution of arc magmatism and associated isotopic variations provide insights into the Phanerozoic history of the western margin of South America during major shifts in Andean and pre-Andean plate interactions. We integrated detrital zircon U-Th-Pb and Hf isotopic results across continental magmatic arc systems of Chile and western Argentina (28°S–33°S) with igneous bedrock geochronologic and zircon Hf isotope results to define isotopic signatures linked to changes in continental margin processes. Key tectonic phases included: Paleozoic terrane accretion and Carboniferous subduction initiation during Gondwanide orogenesis, Permian–Triassic extensional collapse, Jurassic–Paleogene continental arc magmatism, and Neogene flat slab subduction during Andean shortening. The ~550 m.y. record of magmatic activity records spatial trends in magma composition associated with terrane boundaries. East of 69°W, radiogenic isotopic signatures indicate reworked continental lithosphere with enriched (evolved) εHf values and low (<0.65) zircon Th/U ratios during phases of early Paleozoic and Miocene shortening and lithospheric thickening. In contrast, the magmatic record west of 69°W displays depleted (juvenile) εHf values and high (>0.7) zircon Th/U values consistent with increased asthenospheric contributions during lithospheric thinning. Spatial constraints on Mesozoic to Cenozoic arc width provide a rough approximation of relative subduction angle, such that an increase in arc width reflects shallower slab dip. Comparisons among slab dip calculations with time-averaged εHf and Th/U zircon results exhibit a clear trend of decreasing (enriched) magma compositions with increasing arc width and decreasing slab dip. Collectively, these data sets demonstrate the influence of subduction angle on the position of upper-plate magmatism (including inboard arc advance and outboard arc retreat), changes in isotopic signatures, and overall composition of crustal and mantle material along the western edge of South America.

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