New insights from low-temperature thermochronology into the tectonic and geomorphologic evolution of the south-eastern Brazilian highlands and passive margin

Ranst, Gerben Van; Pedrosa-Soares, Antônio Carlos; Novo, Tiago Amâncio; Vermeesch, Pieter; Grave, Johan De

doi:10.1016/j.gsf.2019.05.011

Cited by 35 publications

(34 citation statements)

References 153 publications

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“…2: 21, Santiago et al, 2019;Mendes, 2017). A reheating effect of these magmatic events in the hosting basement has hitherto not been observed (Amaral-Santos et al, 2019;Van Ranst et al, 2020a).…”

Section: Post-cambrian Evolution and Existing Thermochronological Datamentioning

confidence: 98%

“…In Brazil, several thermochronological studies have been conducted along the Atlantic passive margins (e.g. Cogné et al, 2011;Engelmann de Oliveira et al, 2016;Gallagher et al, 1995;Hackspacher et al, 2004;Hueck et al, 2019;Jelinek et al, 2014;Japsen et al, 2012;Krob et al, 2020;Van Ranst et al, 2020a;Harman et al, 1998), mainly focused on detecting thermal variations during rift and post-rift events that are pointed out as essential in the formation of the coastal relief and landscape along the Brazilian Atlantic coast. The cooling phases identified by the previous works indicate that uplift must have taken place during Meso-Cenozoic times, inducing the erosion and exhumation of the crystalline basement.…”

Section: Introductionmentioning

confidence: 99%

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Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil)

et al. 2021

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The São Francisco Craton (SFC) and its marginal Araçuaí and Brasília orogens exhibit a significant diversity in their lithospheric architecture. These orogens were shaped during the Neoproterozoic-Cambrian amalgamation of West Gondwana. The rigid cratonic lithosphere of the SFC and the relatively weak lithosphere of the Araçuaí Orogen were disrupted during the Cretaceous opening of the South Atlantic Ocean, whereas the Brasília Orogen remained in the continental hinterland. In earlier research, the thermal effects of the Phanerozoic reactivations in the shallow crust of the Araçuaí Orogen have been revealed by low-temperature thermochronology, mainly by apatite fission track (AFT) analysis. However, analyses from the continental interior are scarce. Here we present new AFT data from forty-three samples from the Brasília Orogen, the SFC and the Araçuaí Orogen, far from the passive margin of the Atlantic coast (~150 to 800 km). Three main periods of basement exhumation were identified: (i) Paleozoic, recorded both by samples from the SFC and Brasília Orogen; (ii) Early Cretaceous to Cenomanian, recorded by samples from the Araçuaí Orogen; and (iii) Late Cretaceous to Paleocene, inferred in samples from all domains. We compare the differential exhumation pattern of the different geotectonic provinces with their lithospheric strengths. We suggest that the SFC likely concentrated the Meso-Cenozoic reactivations in narrow weak zones while the Araçuaí Orogen displayed a far-reaching Meso-Cenozoic deformation. The Brasília Orogen seems to be an example of a stronger orogenic lithosphere, inhibiting reworking, confirmed by our new AFT data. Understanding the role of the lithosphere rigidity may be decisive to comprehend the processes of differential denudation and the tectonic-morphological evolution over Phanerozoic events.

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Section: Post-cambrian Evolution and Existing Thermochronological Datamentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil)

et al. 2021

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“…Track densities were measured on a fully motorized Nikon Eclipse Ni-E microscope, equipped with a Nikon DS-Ri2 camera. The microscope and camera are linked to a computer with Nikon NIS Elements Advanced Research software, complemented with an in-house macro-enabled Microsoft Excel sheet (TRACKflow β) [32,33]. The AFT ages obtained were calculated using a total weighted mean zeta (OWMZ) of 281.6 ± 5.1 a•cm −2 , which was obtained using Durango [34] and Fish Canyon Tuff [35] age standards and IRMM 540 glass dosimeters [36].…”

Section: Apatite Fission-track (Aft) Datingmentioning

confidence: 99%

“…In general, about 50 horizontal confined tracks for each of our samples were measured on prismatic sections parallel to the crystallographic c-axis to construct length frequency distributions (Table 3). Confined track lengths were measured using a 100× plan apochromat class objective and a 2× secondary optical magnification (Nikon DSC zooming port) without using c-axis projection [32]. To estimate the annealing behavior of the counted grains with measured confined track lengths, measurements of the kinetic parameter D par (mean etch pit diameter parallel to the crystallographic c-axis; [40,41]) were carried out.…”

Section: Apatite Fission-track (Aft) Datingmentioning

confidence: 99%

Tectonic History of the South Tannuol Fault Zone (Tuva Region of the Northern Central Asian Orogenic Belt, Russia): Constraints from Multi-Method Geochronology

et al. 2020

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In this study, we present zircon U/Pb, plagioclase and K-feldspar 40Ar/39Ar and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ). Integrating geochronology and multi-method thermochronology places constraints on the formation and subsequent reactivation of the STFZ. Cambrian (~510 Ma) zircon U/Pb ages obtained for felsic volcanic rocks date the final stage of STFZ basement formation. Ordovician (~460–450 Ma) zircon U/Pb ages were obtained for felsic rocks along the structure, dating their emplacement and marking post-formational local magmatic activity along the STFZ. 40Ar/39Ar stepwise heating plateau-ages (~410–400 Ma, ~365 and ~340 Ma) reveal Early Devonian and Late Devonian–Mississippian intrusion and/or post-magmatic cooling episodes of mafic rocks in the basement. Permian (~290 Ma) zircon U/Pb age of mafic rocks documents for the first time Permian magmatism in the study area creating prerequisites for revising the spread of Permian large igneous provinces of Central Asia. The AFT dating and Thermal history modeling based on the AFT data reveals two intracontinental tectonic reactivation episodes of the STFZ: (1) a period of Cretaceous–Eocene (~100–40 Ma) reactivation and (2) the late Neogene (from ~10 Ma onwards) impulse after a period of tectonic stability during the Eocene–Miocene (~40–10 Ma).

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“…Over-dispersed AHe ages (such as for KM-15) can be the result of several processes, such as the presence of U-rich inclusions (Stockli et al 2000). Many fundamental questions concerning this over-dispersion still remain to be solved (Green & Duddy 2018;Van Ranst et al 2019).…”

Section: Apatite (U-th)/he Datamentioning

confidence: 99%

Cenozoic tectonic evolution of southeastern Thailand derived from low-temperature thermochronology

Nachtergaele

Glorie

Morley

et al. 2019

JGS

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Low-temperature thermochronological techniques, specifically apatite (U-Th)/He and apatite fission-track dating, were used to reconstruct the thermal history of southeastern Thailand. This area is intersected by vast and complex fault networks related to the Cenozoic Mae Ping and Three Pagodas Faults. These were identified from satellite imagery and confirmed by field observations. New apatite fission-track and apatite (U-Th)/He data were collected from crystalline basement blocks within these fault networks. Ages obtained range from 48 to 24 Ma, with most of the samples clustering between 36 and 24 Ma. Thermal history modelling indicates late Eocene-Oligocene exhumation of the exposed granitic and metamorphic basement rocks in southeastern Thailand. Exhumation was regional and was contemporaneous with sinistral fault activity during the late Eocene-early Oligocene along the Mae Ping Fault and Three Pagodas Fault. Moreover, this exhumation occurred coevally with a synrift phase of intracontinental offshore rift basin and half-graben basin development in the eastern Gulf of Thailand. The phase of exhumation ended in the early Miocene, as a result of the changing plate-tectonic forces along the complex plate boundaries of Sundaland.

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New insights from low-temperature thermochronology into the tectonic and geomorphologic evolution of the south-eastern Brazilian highlands and passive margin

Cited by 35 publications

References 153 publications

Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil)

Differential Phanerozoic evolution of cratonic and non-cratonic lithosphere from a thermochronological perspective: São Francisco Craton and marginal orogens (Brazil)

Tectonic History of the South Tannuol Fault Zone (Tuva Region of the Northern Central Asian Orogenic Belt, Russia): Constraints from Multi-Method Geochronology

Cenozoic tectonic evolution of southeastern Thailand derived from low-temperature thermochronology

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