Caracterização Geométrica E Cinemática Da Zona De Cisalhamento Major Gercino E Sua Importância Na Compartimentação Dos Terrenos Pré-Cambrianos De Santa Catarina

Passarelli, Cláudia Regina; Basei, Miguel Ângelo Stipp; Neto, M.C. Campos

doi:10.25249/0375-7536.1993233234241

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…This belt, similar to that proposed by Porada (1979), was generated from the NW subduction of an oceanic crust, the Brusque Group having evolved in a back-arc setting. This model, has been modified as a consequence of studies taken place in different DFB segments, such as: da Silva et al (1980), Basei et al (2000Basei et al ( , 2005Basei et al ( and 2008a, Passarelli et al (1993), Mantovani et al (1989), Phillip et al (2004Fernandes et al (1995, in Rio Grande do Sul, and Bossi and Gaucher (2004), Sanchez-Bettucci et al (2004, Oyhantçabal et al (2009) and Gaucher et al (2009) in Uruguay.…”

Section: Geological Settingmentioning

confidence: 99%

Tectonic evolution of the Brusque Group, Dom Feliciano belt, Santa Catarina, Southern Brazil

Basei

Neto

Castro

et al. 2011

Journal of South American Earth Sciences

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Section: Geological Settingmentioning

confidence: 99%

Tectonic evolution of the Brusque Group, Dom Feliciano belt, Santa Catarina, Southern Brazil

Basei

Neto

Castro

et al. 2011

Journal of South American Earth Sciences

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“…Embora as temperaturas estimadas (a partir das microestruturas?) para a deformação na ZCMG e seu contexto geológico sejam compatíveis com as da ZCTDC, os sentidos de cisalhamento, reportados como dextral (Bitencourt et al 1989) e 'predominantemente dextral' (Passarelli et al 1993), são incompatíveis com a interpretação apresentada nesta contribuição, evidenciando a necessidade de esclarecimento dessa questão.…”

Section: Figura -Movimento Relativo Sinistrai Deduzido Para Os Difereunclassified

Zona De Cisalhamento Transcorrente Dorsal De Canguçu: Caracterização E Importância Na Compartimentação Tectônica Do Cinturão Dom Feliciano

Fernandes

TOMMASI²,

Vauchez³

et al. 1993

RBG

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THE DORSAL DE CANGUÇU STRIKE-SLIP SHEAR ZONE OF THE UPPER PROTEROZOIC DOM FELICIANO BELT OF SOUTHERN BRAZIL: MAIN CHARACTERISTICS AND TECTONICIMPORTANCE. Crustal-scale strike-slip shear zones of the inner part of Dom Feliciano Belt show evidence of a long history of left-lateral movement. They started as transtensional structures along which porphyritic granitoids with mantle-derived signature and a well-developed magmatic fabric were emplaced, followed by the intrusion of a suite of crustal-derived peraluminous leucogranites. Several stages of movement of these shear zones where recognized and characterized at different scales. The eldest is typified by a welldeveloped magmatic planar and linear fabric with NE-NS trends in syntectonic granites. Transitional magmatic to solid state deformational microstructures include undeformed quartz grains within feldspars showing high temperature deformation. Abundant myrmekites along contacts between feldspar porphyroclasts and matrix are suggestive of stress induced diffusion. Mechanical twining, kink bands and interpenetrating grain boundaríes in plagioclase crystals indicates that oriented growth was active. Other high-T structures include grain boundary migration in quartz and grain-size comminution of K-feldspars through ubiquitous development of myrmekites producing a granoblastic polygonal texture. Quartz occurs as mono or polycrystalline ribbons with large polygonal grains with lobate boundaries while biotite shows grain-size reduction keeping cleavage planes parallel to the main foliation. Lovv-T microstructures are abundant in thick sequences of phyllonites and quartz mylonites and nucleation of new grains was the main grain-size reduction process during this stage. Extensive fracturing of feldspar crystals and their replacement by white mica and biotite suggests abundance of fluids. Quartz shows basal slip during this stage. Mylonites of these lOs of km-thick shear zones are affected by several sets of syngenetic and late folds The former show variable geometry becoming cylindrical towards the high strain zones. These strike-slip shear zones which were formerly interpreted as boundaries between allochthonous terranes and collisional sutures are better interpreted as intracontinental structures responsible for the accomodation of late-orogenic belt-parallel movement.

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Shear Zones in Brasiliano-Pan-African Belts and Their Role in the Amalgamation and Break-Up of Southwest Gondwana

Oriolo

Hueck

Oyhantçabal

et al. 2018

Regional Geology Reviews

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Caracterização Geométrica E Cinemática Da Zona De Cisalhamento Major Gercino E Sua Importância Na Compartimentação Dos Terrenos Pré-Cambrianos De Santa Catarina

Cited by 10 publications

References 9 publications

Tectonic evolution of the Brusque Group, Dom Feliciano belt, Santa Catarina, Southern Brazil

Tectonic evolution of the Brusque Group, Dom Feliciano belt, Santa Catarina, Southern Brazil

Zona De Cisalhamento Transcorrente Dorsal De Canguçu: Caracterização E Importância Na Compartimentação Tectônica Do Cinturão Dom Feliciano

Shear Zones in Brasiliano-Pan-African Belts and Their Role in the Amalgamation and Break-Up of Southwest Gondwana

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