Age, composition, and source of the Macururé Mafic Suite, Southern Borborema Province, Brazil

Pereira, Fábio Santos; Rosa, Maria de Lourdes da Silva; Conceição, Herbet; Bertotti, Anelise Losangela

doi:10.1590/2317-4889202020190105

Cited by 8 publications

(7 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Presents trough gravity relief, and comprises parts of Rio of terranes during the Neoproterozoic (Santos et al, 2000;Brito Neves et al, 2000). This proposal has been reinforced by recent studies in the Northern and Transversal domains of the province such as those of Santos et al (2018) and Pereira et al (2020). Thus, evidence points to an accretionary origin for the Sergipano Belt and highlights the importance of accretion tectonics in the evolution of the Borborema Province and the amalgamation of Western Gondwana.…”

Section: Tectonic Implicationsmentioning

confidence: 85%

“…The SBP comprises one of the main tectonic segments of the Borborema Province. Many researchers infer the subdivision of the Borborema Province into three subprovinces: Northern, Central or Transversal and Southern (Brito Neves et al, 2000;, Pereira et al, 2020. The Borborema Province is resulted from continental blocks that collided during the amalgamation of Western Gondwana at the end of the Neoproterozoic.…”

Section: Geological Settingsmentioning

confidence: 99%

See 1 more Smart Citation

Joint modeling gravity, geoidal and geothermal of the Lithosphere in Sergipano Belt and tectonic implications, NE Brazil

Flores

Dutra

Costa

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. In this research paper were applied methods which integrate geophysical and petrological data to the crustal and lithospheric structure in the Sergipano Belt, in the Southern Borborema Province, NE Brazil. These methods allowed us to unveil the main crustal features and their tectonic relationships with the crust-mantle interface (Moho), as well as the lithosphere-asthenosphere boundary (LAB) of this region. The crust structure was constrained by available geological, gravimetric and seismological data, and chemical composition for mantle bodies. Gravity, geoid and heat flow data integrated with existent geological and geophysical data provides to understand the evolution of the Southern Borborema Province. The modeling method was based on local isostasy in which the first phase of the work consisted on the filtering of geoid anomaly and topography data using low-pass in the harmonic and frequency domains, respectively, to estimate the thickness of the crust and the lithosphere, and the second phase is characterized by geothermal modeling. The crustal structure was constrained by geological information, thermo-physical parameters, and gravity and magnetic data inversion results, while the lithospheric mantle was constrained by chemical composition of xenoliths. The results show that maximum depths of Moho and thermal lithosphere (LAB) along the modeled profile are 34–42 km and 194–202 km observed, and temperatures are recorded with an average of 600 °C in the Moho temperature at Sergipano belt. The results presented suggest a thinning lithospheric mantle below the Sergipano belt, with values varying between 168 to 180 km, excepting in Girau do Ponciano whose is 194 km and a moderate lithospheric thickening below the Rio Coruripe, and thicker lithosphere at Pernambuco-Alagoas terrains reached 202 km.

show abstract

Section: Tectonic Implicationsmentioning

confidence: 85%

Section: Geological Settingsmentioning

confidence: 99%

Joint modeling gravity, geoidal and geothermal of the Lithosphere in Sergipano Belt and tectonic implications, NE Brazil

Flores

Dutra

Costa

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The Macururé Domain is an allochthonous terrane accreted to the São Francisco paleoplate margin and the final suture is represented by the collision of the Marancó-Poço Redondo arc (Oliveira et al, 2010) and the closure of an ocean that is represented by the region dominated by high positive gravity (20 to 40 mGal) and of terranes during the Neoproterozoic (Santos et al, 2000;Brito Neves et al, 2000). This proposal has been reinforced by recent studies in the Northern and Transversal domains of the province such as those of Santos et al (2018) and Pereira et al (2020). Thus, evidence points to an accretionary origin for the Sergipano Belt and highlights the importance of accretion tectonics in the evolution of the Borborema Province and the amalgamation of Western Gondwana.…”

Section: Tectonic Implicationsmentioning

confidence: 85%

Comment on se-2021-81

2021

View full text Add to dashboard Cite

“…A presença de rochas shoshoníticas neoproterozoicas no Nordeste do Brasil tem sido descrita por diversos autores (e.g. Guimarães e Silva Filho, 1998;Brito et al, 2009;Silva Filho et al, 2013Lisboa et al, 2019;Soares et al, 2019;Pereira et al, 2019Pereira et al, , 2020. Esses autores sugerem que essas rochas sejam formadas por cristalização de magmas gerados por misturas de fontes (manto e crosta) ou fusão parcial de manto metassomatizado.…”

Section: Introductionunclassified

“…No Sistema Orogênico Sergipano, o magmatismo shoshonítico foi descrito inicialmente por Lisboa et al (2019), e posteriormente, com a ampliação das pesquisas, novos stocks shoshoníticos têm sido descritos (e.g. Santos et al, 2019;Soares et al, 2019;Pereira et al, 2019Pereira et al, , 2020.…”

Section: Introductionunclassified

Petrologia e geocronologia dos stocks Mocambo e Frutuoso, Domínio Macururé, Sistema Orogênico Sergipano

Oliveira

Menezes

Rosa

et al. 2023

Geol. USP. Sér. Cient.

View full text Add to dashboard Cite

Os stocks Mocambo e Frutuoso têm área de 3 km2, possuem formas alongadas, ocorrem intrusivos em rochas metassedimentares da porção centro-leste do Domínio Macururé nas quais provoca metamorfismo de contato. O stock Mocambo é composto de quartzo-dioritos e quartzo-monzodioritos. O stock Frutuoso é formado por quartzo-dioritos porfiríticos. Os quartzo-dioritos e quartzo-monzodioritos apresentam foliação magmática NE-SW paralela à foliação metamórfica regional. Os dados obtidos neste estudo sugerem que esses stocks tenham sido intrusivos em estágio cedo a sincrônico à deformação regional. O stock Mocambo tem idade de cristalização de 614 ± 7 Ma (U-Pb, Shrimp). Enclaves microgranulares dioríticos são presentes nos dois stocks, e as estruturas e texturas indicam interação entre magmas máfico e félsico. As análises petrográficas e químicas em minerais permitiram identificar a presença de oligoclásio, albita, biotita primária reequilibrada, tschermaquita, Mg-hornblenda, epídoto, allanita, ilmenita e magnetita. A cristalização magmática do anfibólio cálcico foi a ~29 km (8 kbar) sob condições oxidantes. As rochas estudadas apresentam afinidade shoshonítica, são magnesianas e podem estar relacionadas a magmas hidratados e oxidantes gerados em um ambiente orogênico. As semelhanças geoquímicas entre os dois stocks indicam que eles são cogenéticos. Os dados químicos evidenciam que as rochas dos stocks Mocambo e Frutuoso apresentam assinaturas geoquímicas de rochas potássicas geradas pelo manto em ambiente de arco continental, com contribuição de manto astenosférico dada a quebra da placa oceânica descendente.

show abstract

Age, composition, and source of the Macururé Mafic Suite, Southern Borborema Province, Brazil

Cited by 8 publications

References 85 publications

Joint modeling gravity, geoidal and geothermal of the Lithosphere in Sergipano Belt and tectonic implications, NE Brazil

Joint modeling gravity, geoidal and geothermal of the Lithosphere in Sergipano Belt and tectonic implications, NE Brazil

Comment on se-2021-81

Petrologia e geocronologia dos stocks Mocambo e Frutuoso, Domínio Macururé, Sistema Orogênico Sergipano

Contact Info

Product

Resources

About