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MYflow - A simple computer program for rheological modelling of mylonites.

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Title: MYflow - A simple computer program for rheological modelling of mylonites.
Authors: Casini, Leonardo1 (AUTHOR) casini@uniss.it, Maino, Matteo2 (AUTHOR), Manna, Ludovico2 (AUTHOR), Funedda, Antonio3 (AUTHOR)
Source: Journal of Structural Geology. Dec2023, Vol. 177, pN.PAG-N.PAG. 1p.
Subjects: Strains & stresses (Mechanics), Strain rate, Computer software, Graphical user interfaces, Shear strain
Abstract: In this study, we present a new Matlab-derived software, MYflow, developed to perform rheological modelling of high-strain rocks and mylonites. The software handles both monomineralic and compositionally heterogeneous rocks made of various proportions of the most common minerals such as quartz, feldspar, calcite, olivine, plagioclase, micas, pyroxene, amphibole and garnet. The rheology of composite mylonites is evaluated using a suite of mixing models combined with two complementary mechanical constraints derived from the assumption of either uniform stress or strain-rate. Various compositions can be used to run either 0th dimensional rheological models corresponding to classical strength profiles, or 2D maps showing the grain-scale spatial variability of stress and strain rate as a function of composition, grain size and effective deformation mechanism. The applicability of the code, along with its main functionalities, is demonstrated using a model of composite mylonite that reproduces the typical microstructure of rocks deformed in high-strain zones. The software is further benchmarked by modelling the grain-scale distribution of effective deformation mechanism, stress, and strain-rate of three natural mylonite developed under different pressure, temperature, and strain-rate conditions. The outcomes of our modelling approach are compared to the results obtained from classical paleopiezometry studies and evaluated in relation to the processes that yield to partitioning of stress and strain rate in shear zones. Finally, we discuss the significance of mean stress and strain rate in mylonites addressing the applicability of recrystallized grain-size paleopiezometry. • MYflow is a Matlab-derived software designed to perform rheological modelling of mylonite. • A user-friendly Graphical User Interface controls model setup, the experimental runs and the analysis of the outputs. • The software provides a new thermodynamically consistent approach to calculate the average stress of mylonite. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Structural Geology is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 173945891
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: MYflow - A simple computer program for rheological modelling of mylonites.
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  Data: <searchLink fieldCode="AR" term="%22Casini%2C+Leonardo%22">Casini, Leonardo</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> casini@uniss.it</i><br /><searchLink fieldCode="AR" term="%22Maino%2C+Matteo%22">Maino, Matteo</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Manna%2C+Ludovico%22">Manna, Ludovico</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Funedda%2C+Antonio%22">Funedda, Antonio</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Structural+Geology%22">Journal of Structural Geology</searchLink>. Dec2023, Vol. 177, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Strains+%26+stresses+%28Mechanics%29%22">Strains & stresses (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Strain+rate%22">Strain rate</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+software%22">Computer software</searchLink><br /><searchLink fieldCode="DE" term="%22Graphical+user+interfaces%22">Graphical user interfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+strain%22">Shear strain</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this study, we present a new Matlab-derived software, MYflow, developed to perform rheological modelling of high-strain rocks and mylonites. The software handles both monomineralic and compositionally heterogeneous rocks made of various proportions of the most common minerals such as quartz, feldspar, calcite, olivine, plagioclase, micas, pyroxene, amphibole and garnet. The rheology of composite mylonites is evaluated using a suite of mixing models combined with two complementary mechanical constraints derived from the assumption of either uniform stress or strain-rate. Various compositions can be used to run either 0th dimensional rheological models corresponding to classical strength profiles, or 2D maps showing the grain-scale spatial variability of stress and strain rate as a function of composition, grain size and effective deformation mechanism. The applicability of the code, along with its main functionalities, is demonstrated using a model of composite mylonite that reproduces the typical microstructure of rocks deformed in high-strain zones. The software is further benchmarked by modelling the grain-scale distribution of effective deformation mechanism, stress, and strain-rate of three natural mylonite developed under different pressure, temperature, and strain-rate conditions. The outcomes of our modelling approach are compared to the results obtained from classical paleopiezometry studies and evaluated in relation to the processes that yield to partitioning of stress and strain rate in shear zones. Finally, we discuss the significance of mean stress and strain rate in mylonites addressing the applicability of recrystallized grain-size paleopiezometry. • MYflow is a Matlab-derived software designed to perform rheological modelling of mylonite. • A user-friendly Graphical User Interface controls model setup, the experimental runs and the analysis of the outputs. • The software provides a new thermodynamically consistent approach to calculate the average stress of mylonite. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Structural Geology is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.jsg.2023.105006
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Strains & stresses (Mechanics)
        Type: general
      – SubjectFull: Strain rate
        Type: general
      – SubjectFull: Computer software
        Type: general
      – SubjectFull: Graphical user interfaces
        Type: general
      – SubjectFull: Shear strain
        Type: general
    Titles:
      – TitleFull: MYflow - A simple computer program for rheological modelling of mylonites.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Casini, Leonardo
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            NameFull: Maino, Matteo
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            NameFull: Manna, Ludovico
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            NameFull: Funedda, Antonio
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          Dates:
            – D: 01
              M: 12
              Text: Dec2023
              Type: published
              Y: 2023
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              Value: 177
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            – TitleFull: Journal of Structural Geology
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