The tectonic significance of the Cabo Frio Tectonic Domain in the SE Brazilian margin: a Paleoproterozoic through Cretaceous saga of a reworked continental margin

Schmitt, Renata da Silva; Trouw, Rudolph Allard Johannes; Schmus, W. R. Van; Armstrong, Richard; Stanton, Natasha

doi:10.1590/2317-4889201620150025

Cited by 71 publications

(54 citation statements)

References 75 publications

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“…Rifting between the Brazilian Espirito Santo and Campos Basins and the Angolan Kwanza Basin (Figures and ) occurred in a Precambrian orogenic lithosphere. Rifting was localized between the Angola Block (Paleoproterozoic) and the Cabo Frio Tectonic Domain which was accreted during the Cambrian Ribeira Orogen (~510 Ma; Trouw et al, ) and involved the collision of the Angola block with the Brazilian Oriental Terrain (Kröner & Stern, ; Schmitt et al, ). The Cretaceous breakup did not occur along the suture of the Ribera orogen, but was located dominantly toward the Angola block (figure 8 in Schmitt et al, ).…”

Section: Tectonic Settingmentioning

confidence: 99%

“…Rifting was localized between the Angola Block (Paleoproterozoic) and the Cabo Frio Tectonic Domain which was accreted during the Cambrian Ribeira Orogen (~510 Ma; Trouw et al, ) and involved the collision of the Angola block with the Brazilian Oriental Terrain (Kröner & Stern, ; Schmitt et al, ). The Cretaceous breakup did not occur along the suture of the Ribera orogen, but was located dominantly toward the Angola block (figure 8 in Schmitt et al, ). The resulting split led to the accreted Ribera terrains, arcs, syncollisional, and post collisional plutons remaining on the Brazilian margin (Schmitt et al, ).…”

Section: Tectonic Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Oriental Terrain (Kröner & Stern, 2004;Schmitt et al, 2016). The Cretaceous breakup did not occur along the suture of the Ribera orogen, but was located dominantly toward the Angola block (figure 8 in Schmitt et al, 2016). The resulting split led to the accreted Ribera terrains, arcs, syncollisional, and post collisional plutons remaining on the Brazilian margin (Schmitt et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

Lavier

Ball

Manatschal

et al. 2019

Geochem Geophys Geosyst

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High‐quality, long offset seismic data from many distal rifted margins show evidence for hyper‐extended, <10‐km‐thick crust. Direct observation of such domains is challenging as they lie, at great water depth, buried beneath thick sedimentary sequences and formed by rock‐assemblages that are hydrated and geophysically indistinguishable. Only a few drill holes have penetrated basement at ultradistal rifted margins. These observations, together with outcrops of preserved analogs exposed in collisional orogens, suggest that the complex interaction of detachment faults rooted in a subhorizontal shear zone in the hyperextended crust or, in the serpentinized mantle controls the formation of the ocean continent transition. While depth‐dependent thinning controls the early phases of rifting conforming to classical rift models, we still have a superficial understanding of how normal faults and subhorizontal shear zones form and evolve during rifting and lithospheric breakup. Here we develop a rheological parameterization to simulate the formation of, and slip‐on, large offset normal faults rooted in growing brittle to ductile shear zones. The evolution of these structures leads to the creation of a hyperextended crust and eventually exhumed serpentinized mantle. We also propose a simplified formulation to simulate magmatic underplating and seafloor spreading. The resulting numerical models provide a self‐consistent picture for the evolution of magma‐poor rifted margins from initiation of rifting to seafloor spreading. The model results are compared with first‐order observations of the Kwanza and Espirito Santo conjugate margins in the South Atlantic as well as of magma‐poor margins globally.

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Section: Tectonic Settingmentioning

confidence: 99%

Section: Tectonic Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

Lavier

Ball

Manatschal

et al. 2019

Geochem Geophys Geosyst

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“…As for the later stages, preliminary geochronologic data from the southernmost part of the West Congo belt suggest high‐temperature and slightly higher (~1 GPa) pressure orogenic activity as late as 540 Ma, with possible additional activity around 490 Ma (Monié et al, ) (Figures b and c). This late activity may be related the late (~540 Ma) collision of the Cabo Frio terrane with the main Ribeira belt (Schmitt et al, ; ) and the associated closure of a pre‐540 Ma basin south of the Araçuaí orogen. This event, marked as the Cabo Frio orogen in Figures b and c, is also suggested to last until ~490 Ma based on U‐Pb dating of metamorphic minerals (Schmitt et al, ).…”

Section: The Araçuaí‐west Congo Orogenmentioning

confidence: 99%

Hot Versus Cold Orogenic Behavior: Comparing the Araçuaí‐West Congo and the Caledonian Orogens

2017

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Observations and modeling show that temperature controls crustal rheology and therefore also the orogenic evolution of continent‐continent collision zones and the associated tectonic style. In order to explore the effect of temperature in a natural environment, we compare eroded sections through the unusually cold lower Paleozoic North Atlantic Caledonian (Scandian) collision zone and the very hot Brasiliano/Pan‐African Araçuaí‐West Congo orogen. A cold and stiff subducting Caledonian continental margin was able to subduct as a rather coherent unit to ultrahigh‐pressure conditions, twice as deep as the Pan‐African/Brasiliano crust that was quickly heated and softened and got involved in partial melting. Furthermore, the Caledonian collision developed large coherent thrust sheets that were transported hundreds of kilometers toward the foreland. This was never achieved in the hot Araçuaí‐West Congo orogen, where much of the tectonic stress was absorbed by the partially molten central part of the orogen through magmatic state deformation. Major mylonite zones (thrusts) such as those seen in the Caledonides are therefore less common in the Araçuaí‐West Congo orogen. Further, the deep continental subduction in the Caledonides developed a strongly asymmetric collision zone, with rapid variations in pressure and temperature. In contrast, the Araçuaí‐West Congo orogen soon developed into a more symmetric geometry due to its easily flowing hot crust, with a relatively flat base and a corresponding plateau in its upper part. Deformation of the cold Caledonian crust was controlled by plate‐tectonic stress, while gravitational forces more strongly influenced the hot Brasiliano/Pan‐African example.

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Suturing Gondwana in the Cambrian: The Orogenic Events of the Final Amalgamation

Schmitt

Fragoso

Collins

2018

Regional Geology Reviews

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The tectonic significance of the Cabo Frio Tectonic Domain in the SE Brazilian margin: a Paleoproterozoic through Cretaceous saga of a reworked continental margin

Cited by 71 publications

References 75 publications

Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

Controls on the Thermomechanical Evolution of Hyperextended Lithosphere at Magma‐Poor Rifted Margins: The Example of Espirito Santo and the Kwanza Basins

Hot Versus Cold Orogenic Behavior: Comparing the Araçuaí‐West Congo and the Caledonian Orogens

Suturing Gondwana in the Cambrian: The Orogenic Events of the Final Amalgamation

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