Articles | Volume 7, issue 2
https://doi.org/10.5194/se-7-375-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/se-7-375-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Brittle grain-size reduction of feldspar, phase mixing and strain localization in granitoids at mid-crustal conditions (Pernambuco shear zone, NE Brazil)
Gustavo Viegas
CORRESPONDING AUTHOR
School of Geography, Earth and Environmental Sciences, Plymouth
University, Drake Circus, Plymouth, UK
Instituto de Geociências, Universidade de São Paulo, Rua do Lago
562, Sao Paulo, Brazil
Luca Menegon
School of Geography, Earth and Environmental Sciences, Plymouth
University, Drake Circus, Plymouth, UK
Carlos Archanjo
Instituto de Geociências, Universidade de São Paulo, Rua do Lago
562, Sao Paulo, Brazil
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58 citations as recorded by crossref.
- Myrmekite and strain weakening in granitoid mylonites A. Ceccato et al. 10.5194/se-9-1399-2018
- Weaker Than Weakest: On the Strength of Shear Zones C. Stenvall et al. 10.1029/2019GL083388
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- Large-scale strain localization induced by phase nucleation in mid-crustal granitoids of the south Armorican massif N. Mansard et al. 10.1016/j.tecto.2018.07.022
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- Interplay between crystal-plasticity, fracturing and dissolution-precipitation creep in lower-crustal ultramylonite from hole U1473A, Atlantis Bank, Southwest Indian Ridge R. Taufner et al. 10.1016/j.jsg.2022.104780
- The competition between rates of deformation and solidification in syn-kinematic granitic intrusions: Resolving the pegmatite paradox R. Butler & T. Torvela 10.1016/j.jsg.2018.08.013
- Structural relationships between ultramylonite, pseudotachylyte and cataclasite in the East Pernambuco shear zone (Borborema Province, NE Brazil) G. Viegas et al. 10.1016/j.jsg.2021.104346
- Deformation, thermochronology and tectonic significance of the crustal-scale Cubatão Shear Zone, Ribeira Belt, Brazil D. Cabrita et al. 10.1016/j.tecto.2022.229278
- Creep of mafic dykes infiltrated by melt in the lower continental crust (Seiland Igneous Province, Norway) G. Degli Alessandrini et al. 10.1016/j.lithos.2016.12.030
- Shear zones – A review H. Fossen & G. Cavalcante 10.1016/j.earscirev.2017.05.002
- The strain‐dependent spatial evolution of garnet in a high‐P ductile shear zone from the Western Gneiss Region (Norway): a synchrotron X‐ray microtomography study A. Macente et al. 10.1111/jmg.12245
- Interactions between deformation and dissolution-precipitation reactions in plagioclase feldspar at greenschist facies J. Gardner et al. 10.1016/j.lithos.2021.106241
- The ultimate fate of a synmagmatic shear zone. Interplay between rupturing and ductile flow in a cooling granite pluton I. Zibra et al. 10.1016/j.jsg.2018.02.001
- Fracturing, comminution and grain-size-sensitive creep as a record of coseismic loading in the middle-crust: Insights from the Urtiga mylonitic pluton (NE Brazil) G. Viegas et al. 10.1016/j.jsg.2024.105237
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- Protracted Shearing at Midcrustal Conditions During Large‐Scale Thrusting in the Scandinavian Caledonides F. Giuntoli et al. 10.1029/2020TC006267
- Partial melting and strain localization in metapelites at very low-pressure conditions: The northern Apennines magmatic arc on the Island of Elba, Italy S. Papeschi et al. 10.1016/j.lithos.2019.105230
- Evolution of shear zones through the brittle-ductile transition: The Calamita Schists (Elba Island, Italy) S. Papeschi et al. 10.1016/j.jsg.2018.05.023
- Grain size reduction due to fracturing and subsequent grain-size-sensitive creep in a lower crustal shear zone in the presence of a CO2-bearing fluid T. Okudaira et al. 10.1016/j.jsg.2016.11.001
- Grain damage, phase mixing and plate-boundary formation D. Bercovici & P. Skemer 10.1016/j.jog.2017.05.002
- Evolution of a rapidly slipping, active low-angle normal fault, Suckling-Dayman metamorphic core complex, SE Papua New Guinea T. Little et al. 10.1130/B35051.1
- Interrogating an along-strike variation in the evolution and rheology of a large continental strike-slip fault zone W. Sullivan 10.1016/j.jsg.2024.105268
- Microstructural and rheological evolution of calcite mylonites during shear zone thinning: Constraints from the Mount Irene shear zone, Fiordland, New Zealand M. Negrini et al. 10.1016/j.jsg.2017.11.013
- Kinematics, nature of deformation and tectonic setting of the Taxaquara Shear Zone, a major transpressional zone of the Ribeira Belt (SE Brazil) B. Ribeiro et al. 10.1016/j.tecto.2018.12.025
- Weak and Slow, Strong and Fast: How Shear Zones Evolve in a Dry Continental Crust (Musgrave Ranges, Central Australia) F. Hawemann et al. 10.1029/2018JB016559
- Formation of the Cenozoic Ailao Shan mid-crustal tectonic discontinuity: Role of Oligo-Miocene stratified sub-horizontal middle to lower crustal flow in the southeastern Tibetan Plateau W. Fan et al. 10.1016/j.jsg.2021.104464
- Contribution of deformation and reaction of amphiboles to the weakening of the middle continental crust: A case study from sheared diorites along the Shuiyu shear zone in Northern Beijing H. Shan et al. 10.1016/j.jsg.2022.104727
- Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran) S. Abbasi et al. 10.1134/S0016852117030025
- Hierarchical creep cavity formation in an ultramylonite and implications for phase mixing J. Gilgannon et al. 10.5194/se-8-1193-2017
- Rheology of the anatectic mid-lower crust in the Paleoproterozoic orogenic belt in Daqingshan, Inner Mongolia L. TongJun et al. 10.18654/1000-0569/2020.11.04
- Slow‐to‐Fast Deformation in Mafic Fault Rocks on an Active Low‐Angle Normal Fault, Woodlark Rift, SE Papua New Guinea M. Mizera et al. 10.1029/2020GC009171
- Interplay between seismic fracture and aseismic creep in the Woodroffe Thrust, central Australia – Inferences for the rheology of relatively dry continental mid-crustal levels S. Wex et al. 10.1016/j.tecto.2018.10.024
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- Fluid-enhanced grain-size reduction of K-feldspar from a natural middle crustal shear zone in northern Beijing, China B. Zhou et al. 10.1016/j.tecto.2022.229478
- Magnetic fabric of the early-Ediacaran Itapetim monzogranitic pluton: magma flow during oblique extension along strike-slip shear zones (Eastern Brazil) G. Viegas et al. 10.1016/j.jsg.2022.104738
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- On the petrology and microstructures of small-scale ductile shear zones in granitoid rocks: An overview A. Ceccato et al. 10.1016/j.jsg.2022.104667
- Seismic cycle feedbacks in a mid-crustal shear zone B. Melosh et al. 10.1016/j.jsg.2018.04.004
- Deformation characteristics of the high-grade metamorphic and anatectic rocks in the Daqingshan Paleoproterozoic orogenic belt, Inner Mongolia: A case study from the Shijiaqu-Xuehaigou area T. Liu et al. 10.1016/j.precamres.2022.106644
- The Impact of Rheology on the Transition From Stick‐Slip to Creep in a Semibrittle Analog T. Birren & J. Reber 10.1029/2018JB016914
- How Does Viscosity Contrast Influence Phase Mixing and Strain Localization? A. Cross et al. 10.1029/2020JB020323
- A cavitation-seal mechanism for ultramylonite formation in quartzofeldspathic rocks within the semi-brittle field (Vivero fault, NW Spain) M. Lopez-Sanchez & S. Llana-Fúnez 10.1016/j.tecto.2018.07.026
- Development of cataclastic foliation in deformation bands in feldspar-rich conglomerates of the Rio do Peixe Basin, NE Brazil M. Nicchio et al. 10.1016/j.jsg.2017.12.013
- The role of deformation-reaction interactions to localize strain in polymineralic rocks: Insights from experimentally deformed plagioclase-pyroxene assemblages N. Mansard et al. 10.1016/j.jsg.2020.104008
- Rheology, shear zone width, microstructural evolution and tectonics of a zippered strike-slip shear zone: The Senador Pompeu shear zone, northern Borborema Province, Brazil C. Ávila et al. 10.1016/j.jsg.2022.104776
- Syn-kinematic hydration reactions, grain size reduction, and dissolution–precipitation creep in experimentally deformed plagioclase–pyroxene mixtures S. Marti et al. 10.5194/se-9-985-2018
- Transient High Strain Rate During Localized Viscous Creep in the Dry Lower Continental Crust (Lofoten, Norway) L. Campbell & L. Menegon 10.1029/2019JB018052
- Deformation mechanisms of granulite-facies mafic shear zones from hole U1473A, Atlantis Bank, Southwest Indian Ridge (IODP Expedition 360) R. Taufner et al. 10.1016/j.jsg.2021.104380
- New perspectives on ‘geological strain rates’ calculated from both naturally deformed and actively deforming rocks Å. Fagereng & J. Biggs 10.1016/j.jsg.2018.10.004
- Deformation conditions during syn-convergent extension along the Cordillera Blanca shear zone, Peru C. Hughes et al. 10.1130/GES02040.1
- Fluid-enhanced diffusive mass transfer combined with GBS as an important process for protracted weakening in the middle-lower crust C. Hou et al. 10.1016/j.jsg.2023.104861
- A continuum theory for phase mixing and grain-damage relevant to tectonic plate boundary evolution D. Bercovici & E. Mulyukova 10.1016/j.pepi.2018.10.005
- The recognition of former melt flux through high‐strain zones C. Stuart et al. 10.1111/jmg.12427
- Microstructures, geochemistry, and geochronology of mica fish: Review and advances B. Ribeiro et al. 10.1016/j.jsg.2023.104947
58 citations as recorded by crossref.
- Myrmekite and strain weakening in granitoid mylonites A. Ceccato et al. 10.5194/se-9-1399-2018
- Weaker Than Weakest: On the Strength of Shear Zones C. Stenvall et al. 10.1029/2019GL083388
- Deformation mechanisms and rheology inversion of jointly deformed marble and quartzite in natural thermal gradient K. Schulmann et al. 10.1016/j.jsg.2023.104892
- Comparison of brittle- and viscous creep in quartzites: Implications for semi-brittle flow of rocks J. Reber & M. Pec 10.1016/j.jsg.2018.05.022
- Large-scale strain localization induced by phase nucleation in mid-crustal granitoids of the south Armorican massif N. Mansard et al. 10.1016/j.tecto.2018.07.022
- The effect of hydrous mineral content on competitive strain localization mechanisms in felsic granulites R. Graziani et al. 10.1016/j.jsg.2020.104015
- Interplay between crystal-plasticity, fracturing and dissolution-precipitation creep in lower-crustal ultramylonite from hole U1473A, Atlantis Bank, Southwest Indian Ridge R. Taufner et al. 10.1016/j.jsg.2022.104780
- The competition between rates of deformation and solidification in syn-kinematic granitic intrusions: Resolving the pegmatite paradox R. Butler & T. Torvela 10.1016/j.jsg.2018.08.013
- Structural relationships between ultramylonite, pseudotachylyte and cataclasite in the East Pernambuco shear zone (Borborema Province, NE Brazil) G. Viegas et al. 10.1016/j.jsg.2021.104346
- Deformation, thermochronology and tectonic significance of the crustal-scale Cubatão Shear Zone, Ribeira Belt, Brazil D. Cabrita et al. 10.1016/j.tecto.2022.229278
- Creep of mafic dykes infiltrated by melt in the lower continental crust (Seiland Igneous Province, Norway) G. Degli Alessandrini et al. 10.1016/j.lithos.2016.12.030
- Shear zones – A review H. Fossen & G. Cavalcante 10.1016/j.earscirev.2017.05.002
- The strain‐dependent spatial evolution of garnet in a high‐P ductile shear zone from the Western Gneiss Region (Norway): a synchrotron X‐ray microtomography study A. Macente et al. 10.1111/jmg.12245
- Interactions between deformation and dissolution-precipitation reactions in plagioclase feldspar at greenschist facies J. Gardner et al. 10.1016/j.lithos.2021.106241
- The ultimate fate of a synmagmatic shear zone. Interplay between rupturing and ductile flow in a cooling granite pluton I. Zibra et al. 10.1016/j.jsg.2018.02.001
- Fracturing, comminution and grain-size-sensitive creep as a record of coseismic loading in the middle-crust: Insights from the Urtiga mylonitic pluton (NE Brazil) G. Viegas et al. 10.1016/j.jsg.2024.105237
- Enhancement of ductile deformation in polycrystalline anorthite due to the addition of water J. Fukuda et al. 10.1016/j.jsg.2022.104547
- Early to late Neoproterozoic subduction-accretion episodes in the Cariris Velhos Belt of the Borborema Province, Brazil: Insights from isotope and whole-rock geochemical data of supracrustal and granitic rocks L. Santos et al. 10.1016/j.jsames.2019.102384
- Protracted Shearing at Midcrustal Conditions During Large‐Scale Thrusting in the Scandinavian Caledonides F. Giuntoli et al. 10.1029/2020TC006267
- Partial melting and strain localization in metapelites at very low-pressure conditions: The northern Apennines magmatic arc on the Island of Elba, Italy S. Papeschi et al. 10.1016/j.lithos.2019.105230
- Evolution of shear zones through the brittle-ductile transition: The Calamita Schists (Elba Island, Italy) S. Papeschi et al. 10.1016/j.jsg.2018.05.023
- Grain size reduction due to fracturing and subsequent grain-size-sensitive creep in a lower crustal shear zone in the presence of a CO2-bearing fluid T. Okudaira et al. 10.1016/j.jsg.2016.11.001
- Grain damage, phase mixing and plate-boundary formation D. Bercovici & P. Skemer 10.1016/j.jog.2017.05.002
- Evolution of a rapidly slipping, active low-angle normal fault, Suckling-Dayman metamorphic core complex, SE Papua New Guinea T. Little et al. 10.1130/B35051.1
- Interrogating an along-strike variation in the evolution and rheology of a large continental strike-slip fault zone W. Sullivan 10.1016/j.jsg.2024.105268
- Microstructural and rheological evolution of calcite mylonites during shear zone thinning: Constraints from the Mount Irene shear zone, Fiordland, New Zealand M. Negrini et al. 10.1016/j.jsg.2017.11.013
- Kinematics, nature of deformation and tectonic setting of the Taxaquara Shear Zone, a major transpressional zone of the Ribeira Belt (SE Brazil) B. Ribeiro et al. 10.1016/j.tecto.2018.12.025
- Weak and Slow, Strong and Fast: How Shear Zones Evolve in a Dry Continental Crust (Musgrave Ranges, Central Australia) F. Hawemann et al. 10.1029/2018JB016559
- Formation of the Cenozoic Ailao Shan mid-crustal tectonic discontinuity: Role of Oligo-Miocene stratified sub-horizontal middle to lower crustal flow in the southeastern Tibetan Plateau W. Fan et al. 10.1016/j.jsg.2021.104464
- Contribution of deformation and reaction of amphiboles to the weakening of the middle continental crust: A case study from sheared diorites along the Shuiyu shear zone in Northern Beijing H. Shan et al. 10.1016/j.jsg.2022.104727
- Deformation condition determination and strain analysis: Application of microstructural and microthermometry study of the Zamanabad Shear Zone (East of Iran) S. Abbasi et al. 10.1134/S0016852117030025
- Hierarchical creep cavity formation in an ultramylonite and implications for phase mixing J. Gilgannon et al. 10.5194/se-8-1193-2017
- Rheology of the anatectic mid-lower crust in the Paleoproterozoic orogenic belt in Daqingshan, Inner Mongolia L. TongJun et al. 10.18654/1000-0569/2020.11.04
- Slow‐to‐Fast Deformation in Mafic Fault Rocks on an Active Low‐Angle Normal Fault, Woodlark Rift, SE Papua New Guinea M. Mizera et al. 10.1029/2020GC009171
- Interplay between seismic fracture and aseismic creep in the Woodroffe Thrust, central Australia – Inferences for the rheology of relatively dry continental mid-crustal levels S. Wex et al. 10.1016/j.tecto.2018.10.024
- Brittle–ductile fabrics and P – T conditions of deformation in the East Pernambuco shear zone (Borborema Province, NE Brazil) P. Castellan et al. 10.1144/jgs2020-109
- Fluid-enhanced grain-size reduction of K-feldspar from a natural middle crustal shear zone in northern Beijing, China B. Zhou et al. 10.1016/j.tecto.2022.229478
- Magnetic fabric of the early-Ediacaran Itapetim monzogranitic pluton: magma flow during oblique extension along strike-slip shear zones (Eastern Brazil) G. Viegas et al. 10.1016/j.jsg.2022.104738
- Deformation Mechanisms of Blueschist Facies Continental Metasediments May Offer Insights Into Deep Episodic Tremor and Slow Slip Events F. Giuntoli et al. 10.1029/2022JB024265
- Strain localization at brittle-ductile transition depths during Miocene magmatism and exhumation in the southern Basin and Range A. Zuza et al. 10.1016/j.jsg.2022.104709
- On the petrology and microstructures of small-scale ductile shear zones in granitoid rocks: An overview A. Ceccato et al. 10.1016/j.jsg.2022.104667
- Seismic cycle feedbacks in a mid-crustal shear zone B. Melosh et al. 10.1016/j.jsg.2018.04.004
- Deformation characteristics of the high-grade metamorphic and anatectic rocks in the Daqingshan Paleoproterozoic orogenic belt, Inner Mongolia: A case study from the Shijiaqu-Xuehaigou area T. Liu et al. 10.1016/j.precamres.2022.106644
- The Impact of Rheology on the Transition From Stick‐Slip to Creep in a Semibrittle Analog T. Birren & J. Reber 10.1029/2018JB016914
- How Does Viscosity Contrast Influence Phase Mixing and Strain Localization? A. Cross et al. 10.1029/2020JB020323
- A cavitation-seal mechanism for ultramylonite formation in quartzofeldspathic rocks within the semi-brittle field (Vivero fault, NW Spain) M. Lopez-Sanchez & S. Llana-Fúnez 10.1016/j.tecto.2018.07.026
- Development of cataclastic foliation in deformation bands in feldspar-rich conglomerates of the Rio do Peixe Basin, NE Brazil M. Nicchio et al. 10.1016/j.jsg.2017.12.013
- The role of deformation-reaction interactions to localize strain in polymineralic rocks: Insights from experimentally deformed plagioclase-pyroxene assemblages N. Mansard et al. 10.1016/j.jsg.2020.104008
- Rheology, shear zone width, microstructural evolution and tectonics of a zippered strike-slip shear zone: The Senador Pompeu shear zone, northern Borborema Province, Brazil C. Ávila et al. 10.1016/j.jsg.2022.104776
- Syn-kinematic hydration reactions, grain size reduction, and dissolution–precipitation creep in experimentally deformed plagioclase–pyroxene mixtures S. Marti et al. 10.5194/se-9-985-2018
- Transient High Strain Rate During Localized Viscous Creep in the Dry Lower Continental Crust (Lofoten, Norway) L. Campbell & L. Menegon 10.1029/2019JB018052
- Deformation mechanisms of granulite-facies mafic shear zones from hole U1473A, Atlantis Bank, Southwest Indian Ridge (IODP Expedition 360) R. Taufner et al. 10.1016/j.jsg.2021.104380
- New perspectives on ‘geological strain rates’ calculated from both naturally deformed and actively deforming rocks Å. Fagereng & J. Biggs 10.1016/j.jsg.2018.10.004
- Deformation conditions during syn-convergent extension along the Cordillera Blanca shear zone, Peru C. Hughes et al. 10.1130/GES02040.1
- Fluid-enhanced diffusive mass transfer combined with GBS as an important process for protracted weakening in the middle-lower crust C. Hou et al. 10.1016/j.jsg.2023.104861
- A continuum theory for phase mixing and grain-damage relevant to tectonic plate boundary evolution D. Bercovici & E. Mulyukova 10.1016/j.pepi.2018.10.005
- The recognition of former melt flux through high‐strain zones C. Stuart et al. 10.1111/jmg.12427
- Microstructures, geochemistry, and geochronology of mica fish: Review and advances B. Ribeiro et al. 10.1016/j.jsg.2023.104947
Saved (final revised paper)
Latest update: 21 Nov 2024
Short summary
This paper presents microstructural and chemical data of mylonitic granitoids deformed at the brittle-ductile transition in the continental crust. Through a combination of microstructures, chemical analyses and modelling of the strength of constituent phases, we were able to show that strain localisation in shear zones may be triggered primarily by brittle failure, without the need for reaction-softening mechanisms promoted by metamorphic fluids.
This paper presents microstructural and chemical data of mylonitic granitoids deformed at the...