Constraints from zircon geochronology on the tectonic evolution of the Borborema Province (NE Brazil): Widespread intracontinental Neoproterozoic reworking of a Paleoproterozoic accretionary orogen

Neves, Sérgio P.

doi:10.1016/j.jsames.2014.08.004

Cited by 93 publications

(38 citation statements)

References 117 publications

(147 reference statements)

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“…However, although situated in the same orogenic realm, the spatial position of these basins in the orogeny and the provenance of the sediments are still in dispute (e.g. Neves, 2015). According to Ganade de Araújo et al (2014), an active continental margin would separated the provenance of the basal strata of the Martinópole Group from the quartzites and conglomerates of the Lavras da Mangabeira and Seridó basins.…”

Section: Stratigraphic Correlationsmentioning

confidence: 99%

Detrital zircon ages and Nd isotope compositions of the Seridó and Lavras da Mangabeira basins (Borborema Province, NE Brazil): Evidence for exhumation and recycling associated with a major shift in sedimentary provenance

Hollanda¹,

Archanjo²,

Bautista³

et al. 2015

Precambrian Research

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Section: Stratigraphic Correlationsmentioning

confidence: 99%

Detrital zircon ages and Nd isotope compositions of the Seridó and Lavras da Mangabeira basins (Borborema Province, NE Brazil): Evidence for exhumation and recycling associated with a major shift in sedimentary provenance

Hollanda¹,

Archanjo²,

Bautista³

et al. 2015

Precambrian Research

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“…The age of 2.18 Ga of sample RS-234 is amongst the oldest found in the Central Domain, where ages younger than 2.15 Ga are more common (Van Schmus et al, 1995Neves, 2015, and references cited in these works). This sample and nearby rocks are indistinguishable on field and petrographic basis from the much younger (c. 2.06 Ga) migmatitic orthogneisses of the Salgadinho and Cabaceiras complexes, which demonstrates the need for systematic geochronological and geochemical work in old gneissic terrains.…”

Section: Paleoproterozoic Magmatic and Metamorphic Eventsmentioning

confidence: 88%

Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain

Neves

Lages

Brasilino

et al. 2015

Journal of South American Earth Sciences

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a b s t r a c tSeveral Brasiliano-Pan-African belts consist of large areas of reworked Paleoproterozoic rocks. Characterization of these rocks is needed to place better controls on Precambrian paleogeographic reconstructions. The Borborema Province, northeastern Brazil, occupies a central position in West Gondwana configuration, and knowledge of its geological evolution is crucial to infer relationships between Paleoproterozoic units in South America and Africa. Here, we report UePb ages, major-and trace-elements analyses and SmeNd isotopic data for orthogneisses in the eastern portion of Central Domain. The dominant basement units in the study area are banded gneisses of intermediate composition and relatively juvenile character, and migmatitic gneisses of granitic composition with Archean Nd T DM model ages. One sample of the banded gneiss yielded a weighted 207 Pb/ 206 Pb age of 2096 ± 23 Ma and an upper intercept age of 2044 ± 27 Ma, which we interpret, respectively, as ages of crystallization and metamorphism. Two large units of migmatitic gneiss in the southern and central parts of the area gave ages of, respectively, 2057 ± 20 Ma and 2055 ± 23 Ma; an orthoamphibolite associated with the latter yielded crystallization age of 2042 ± 11 Ma and metamorphic age of 1996 ± 13 Ma. All these rocks have geochemical signatures typical of subduction zone-related magmas. Combined with evidence provided by previous studies, we suggest that the evolution of the study area starts with island arc construction around 2.2 Ga, leading to an expressive volcanic arc edifice by 2.13 e2.10 Ga. By 2.06 Ga, the crust had evolved enough to become intruded by magmas formed at the mantle wedge of the now largely continental magmatic arc, which continued to be intruded by mantle melts until at least 2.04 Ga. An augen gneiss in the northern part of the area, with an age of 2109 ± 15 Ma, and a migmatitic gneiss with a much older age (2183 ± 9 Ma), both of which have geochemical characteristics akin to intraplate magmas, suggest that crustal reworking also took place. The 1981 ± 23 Ma age of a small body of peraluminous felsic gneiss may be related to regional metamorphism and syncollisional magmatism at c. 2.0e1.98 Ga.

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“…In several portions of Western Gondwana, the nature of major geodynamic processes (i.e., crustal growth and reworking) is still poorly understood (e.g., Brito Neves et al, ; Neves, ). Nevertheless, the Neoproterozoic orogenic belts in the region developed during subduction‐collision‐related processes (Brito Neves et al, ; Caby, ; Caxito et al, ; Santos et al, ).…”

Section: Introductionmentioning

confidence: 99%

Accretion Tectonics in Western Gondwana Deduced From Sm‐Nd Isotope Mapping of Terranes in the Borborema Province, NE Brazil

et al. 2018

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Constraints from zircon geochronology on the tectonic evolution of the Borborema Province (NE Brazil): Widespread intracontinental Neoproterozoic reworking of a Paleoproterozoic accretionary orogen

Cited by 93 publications

References 117 publications

Detrital zircon ages and Nd isotope compositions of the Seridó and Lavras da Mangabeira basins (Borborema Province, NE Brazil): Evidence for exhumation and recycling associated with a major shift in sedimentary provenance

Detrital zircon ages and Nd isotope compositions of the Seridó and Lavras da Mangabeira basins (Borborema Province, NE Brazil): Evidence for exhumation and recycling associated with a major shift in sedimentary provenance

Paleoproterozoic accretionary and collisional processes and the build-up of the Borborema Province (NE Brazil): Geochronological and geochemical evidence from the Central Domain

Accretion Tectonics in Western Gondwana Deduced From Sm‐Nd Isotope Mapping of Terranes in the Borborema Province, NE Brazil

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