U–Pb detrital zircon dating applied to metavolcano-sedimentary complexes of the São Gabriel Terrane: New constraints on the evolution of the Dom Feliciano Belt

Philipp, Ruy Paulo; Pimentel, Márcio Martins; Basei, Miguel Ângelo Stipp; Salvi, M.; Lena, Luis; Vedana, Luiz Alberto; Gubert, Mauricio Lemos; Lopes, Cinthia Távora de Albuquerque; Laux, Jorge Henrique; Camozzato, Eduardo

doi:10.1016/j.jsames.2021.103409

Cited by 15 publications

(7 citation statements)

References 63 publications

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“…Zircon crystallisation ages are reported in Table S2. Following previous authors (Baesso et al, 2021; Markwitz et al, 2017; Olierook et al, 2019; Philipp et al, 2021; Wang et al, 2021), ages with discordance >10% were discarded (n = 17). We used the 206 Pb/ 238 U age to date the zircons younger than 1.3 Ga and the 206 Pb/ 207 Pb age for the zircons older than 1.2 Ga, in agreement with Gehrels et al (2008).…”

Section: Resultsmentioning

confidence: 99%

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

et al. 2023

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The provenance of Early Cretaceous sandstones dredged on the northern margin of the Demerara Plateau, offshore French Guiana and Suriname, reveals the sediment routing system that prevailed through the Equatorial Atlantic rifting. Fission‐track analysis and U–Pb dating of 310 and 111 detrital zircons, respectively, have been performed. Microfacies analysis and inherited cooling ages suggest that the sandstones were deposited in shallow marine environments during the Early Cretaceous, before the Late Albian drowning of the marginal plateau. Most of the U–Pb zircon crystallisation ages are comprised of between 700 and 600 Ma and are attributed to the Pan‐African‐Brasiliano orogeny. Statistical and chronological evidence suggest that the zircon fission‐track cooling ages were inherited from source materials. Triassic peak ages (>50% of the population) are attributed to the early phase of Central Atlantic rifting. One sample records a cooling phase at ca. 170 Ma, presumably following volcanic hotspot activity and the opening of the Central Atlantic Ocean. Two other samples record the rapid exhumation of the French Guiana transform margin during the Equatorial Atlantic rifting (127 ± 11 and 106 ± 8 Ma). We propose a source‐to‐sink model in which the Pan‐African‐Brasiliano basement of the margin was eroded as a result of flexural uplift along the French Guiana margin, and the detrital material funnelled in the Cacipore graben sustained the Early Cretaceous syn‐rift sedimentation on the marginal plateau.

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Section: Resultsmentioning

confidence: 99%

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

et al. 2023

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“…5 A provenance age reported for the Arroio Marmeleiro Complex determined by zircon U-Pb from a sandstone yield an age of 1.5 Ga (Philipp et al, 2021). This is interpreted as a maximal depositional age of a passive marginal basin of the Río de la Plata Craton.…”

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confidence: 88%

“…The geodynamic evolution of the São Gabriel Terrane is controlled by the closure of the Charrua Ocean that took place at 900-700 Ma, represented by outcrops of the mafic-ultramafic ocean floor in the Cerro Mantiqueira Complex (Arena, Hartmann, & Lana, 2016;Leite, Hartmann, McNaugton, & Chemale Jr., 1998;Tommasi et al, 1994), and its passive marginal basin unit in the Arroio Marmeleiro Complex (Philipp et al, 2021;Santos, Maciel, & Zir Filho, 1998). Associated with this ocean closure, arc-related units were formed, including those of this study, namely the Sanga da Cachoeira Complex (Laux, 2017), Imbicuí Complex (Philipp, Pimentel, & Basei, 2018), and the Cambaí Complex (Silva-Filho & Soliani Jr., 1987).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, a tectonic-metamorphic analysis coupled with accurate radiometric dating of this terrane provides useful geological information to a better understanding of the mutual interactions between the Neoproterozoic amalgamation and deformations, in general, associated with shear zones (Hueck et al, 2020). The recurrent deformation during crustal amalgamation and also the emplacement of magmatic plutons in the São Gabriel Terrane suggest distinct thermal events in the region associated with several shear zones, which play an important role in the deformation of the crust, reconstruction, and evolution of the lithosphere (Cerva-Alves, Hartamn, Remus, & Lana, 2020;Oriolo et al, 2018;Philipp et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

et al. 2021

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Belt, Brazil, associated with previous structural geology and geochronology studies, allow for a better understanding of Neoproterozoic events in this region. The Sanga da Cachoeira Complex and metasedimentary rocks of Arroio Marmeleiro Complex (U-Pb provenance age > 1.5 Ga) show 40 Ar/ 39 Ar spectra with no successful plateau age, attributed to the alteration or excess 40 Ar. Tonian (ca. 729 ± 9 Ma) 40 Ar/ 39 Ar hornblende age of metadiorites of the Cambaí Complex (U-Pb protolith age ca. 750 Ma) is interpreted to register the age of an early structure in this unit, where hornblende is a mineral of the composite banding fabric formed by remnants of original bedding, locally preserved, and added by metamorphic recrystallization. A cooling rate of at least 5 C/Ma is suggested for the Cambaí Complex, from its crystallization to its metamorphic event. The Cryogenian (<690 ± 8 Ma) 40 Ar/ 39 Ar hornblende and muscovite ages belonging to the Imbicuí Complex (protolith age ca. 869 Ma) whose ages are related to the late structure formed by a short and intense activity of the Cerro Branco Shear Zone, which experienced a rapid cooling of 12 C/Ma. The ages from the rocks belonging to such a diverse tectonic setting, including continental and intraoceanic island arc, oceanic crust low-K amphibolites and meta-harzburgites, and metasediments, presenting similar nature and fabric orientation, indicate that major tectonic-magmatic-metamorphic activity was responsible for the accretion of these lithotectonic units that gave rise to the São Gabriel Terrane in southern Brazil.

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“…Both blocks comprise partially overlapping magmatic ages, but have contrasting isotopic signatures in which the first one is predominantly juvenile, whereas the second clearly involved the reworking of crustal sources. The São Gabriel Terrane comprises two main magmatic associations, interpreted as two different magmatic arcs, together with passive margin associations and relict ophiolite complexes (Philipp et al 2018(Philipp et al , 2021. The first magmatic association presents ages ranging from 890 to 860 Ma and is interpreted as an intraoceanic arc (Pasinho Arc, e.g.…”

Section: Geological Frameworkmentioning

confidence: 99%

Reassessing the polyphase Neoproterozoic evolution of the Punta del Este Terrane, Dom Feliciano Belt, Uruguay

Lara

Siegesmund

Oriolo

et al. 2022

Int J Earth Sci (Geol Rundsch)

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Some recent models challenge the position and extension of the assumed oceanic basins formed through the break-up of Rodinia, and the tectonic processes involved in the Gondwana assembly, making the investigation of the Early Neoproterozoic record of great relevance. Within the South-American Atlantic margin, the Punta del Este Terrane (PET) of the Dom Feliciano Belt (DFB) comprises a unique Tonian to Ediacaran record, and has a strategic position to reconstruct spatio-temporal relationships with the southern African orogenic belts. Novel zircon U–Pb and Lu–Hf data from the PET basement orthogneisses display Tonian magmatic ages (805–760 Ma) and Hf isotopic signatures indicative of mainly crustal/metasedimentary sources, (Nd TDM ages: 2.2–1.9 Ga, and εHf(t): − 12 to − 4). The basement paragneisses yielded late Paleoproterozoic to Neoproterozoic U–Pb ages, but dominantly positive εHf(t) values. The presented results confirm the correlation of the PET with the Coastal Terrane of the Kaoko Belt, and discard the idea of the Nico Pérez Terrane as a source. Detrital zircon U–Pb and Lu–Hf data from the Rocha Formation yielded a main peak at ca. 660 Ma, with the Neoproterozoic grains showing a εHf(t) between + 1 and + 14. The deposition age of the Rocha Formation is constrained by the youngest detrital zircon age peak (660 Ma), and the beginning of the deposition of the Sierra de Aguirre Formation (580 Ma). The data indicate common sources with the Marmora Terrane, and it is thus proposed that the Rocha Formation belongs to the Gariep Belt, and it was juxtaposed during the Ediacaran to the DFB.

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U–Pb detrital zircon dating applied to metavolcano-sedimentary complexes of the São Gabriel Terrane: New constraints on the evolution of the Dom Feliciano Belt

Cited by 15 publications

References 63 publications

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

Reassessing the polyphase Neoproterozoic evolution of the Punta del Este Terrane, Dom Feliciano Belt, Uruguay

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U–Pb detrital zircon dating applied to metavolcano-sedimentary complexes of the São Gabriel Terrane: New constraints on the evolution of the Dom Feliciano Belt

Cited by 15 publications

References 63 publications

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

Thermochronology and U–Pb dating of detrital zircons from the Demerara Plateau (French Guiana‐Suriname): Implications for the provenance of the Early Cretaceous syn‐rift sedimentation

Tonian and Cryogenian 40Ar/39Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil

Reassessing the polyphase Neoproterozoic evolution of the Punta del Este Terrane, Dom Feliciano Belt, Uruguay

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Tonian and Cryogenian ⁴⁰Ar/³⁹Ar hornblende and muscovite ages for the São Gabriel Terrane, Dom Feliciano Belt, southern Brazil