Short noteFlow mixing, object-matrix coherence, mantle growth and the development of porphyroclast tails
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Cited by (28)
Role of pressure and temperature in inclusion-induced shear localization: An analogue experimental approach
2015, Journal of Structural GeologyCitation Excerpt :Given all the thermo-mechanical parameters remaining constant during the deformation, these heterogeneities perturb the stress field in their vicinity (Eshelby, 1959), resulting in nucleation and propagation of ductile shear instabilities in the form of shear bands (Bowden, 1970; Rudniki and Rice, 1975; Poirier, 1980; Masuda and Ando, 1988). Understanding the mechanics of inclusion-induced shear localization has led to a plethora of experimental and theoretical studies in structural geology and rock mechanics (Ildefonse and Mancktelow, 1993; Bjornerud and Zhang, 1995; Christiansen and Pollard, 1997; Dresen et al., 1998; Brun and Cobbold, 1980; Mandal et al., 2004; Misra and Mandal, 2007). Most of these investigations show the effects of inclusion geometry in strain localization without accounting exclusively the effects of pressures or temperatures.
The behaviour of deformable and non-deformable inclusions in viscous flow
2014, Earth-Science ReviewsStrain partitioning in banded and/or anisotropic rocks: Implications for inferring tectonic regimes
2013, Journal of Structural GeologyCitation Excerpt :A bulk coaxial shortening can be partitioned into vorticity (Wk) domains in which Wk < 0 and domains in which Wk > 0 (e.g. Bell's millipedes, Bell, 1981). A simple shear of a rigid body generates flow perturbations with local domains with a Wk sign opposite to the Wk sign of the bulk deformation, (Fig. 4); (e.g. Bjørnerud and Zhang, 1995; Masuda and Mizuno, 1996; Mandal et al., 2005; Griera 2005; Dabrowski and Schmid, 2011). It follows from this discussion that deformation of crustal domains of rheologically heterogeneous rocks, e.g granite plutons emplaced in metasedimentary rocks, will entail flow perturbations with strain and vorticity partitioning.
Behaviour of an isolated rimmed elliptical inclusion in 2D slow incompressible viscous flow
2013, Journal of Structural GeologyCitation Excerpt :For detachment of the interface allowing shear slip but no normal movement (i.e., Mode 2 detachment of Samanta and Bhattacharyya, 2003), the concentric elliptical shape will be maintained as long as the inclusion itself remains elliptical. However, in general, a rim of finite thickness will be deformed into an increasingly non-elliptical shape with increasing bulk strain (Figs. 15–17) (e.g., Passchier and Simpson, 1986; Passchier and Sokoutis, 1993; Passchier et al., 1993; Bjørnerud and Zhang, 1995; ten Brink and Passchier, 1995; Masuda and Mizuno, 1996; Ten and Yuen, 1999; Mandal et al., 2000; Passchier and Trouw, 2005). The question is how significantly this alters the rotational and (for non-rigid inclusions) stretching behaviour of the inclusion.
Deformation of an elliptical inclusion in two-dimensional incompressible power-law viscous flow
2011, Journal of Structural GeologyCitation Excerpt :They then compared these results to analogue model experiments in simple shear. Details of the rotational behaviour of rigid particles and possible factors that could hinder this rotation have been the subject of many other studies, reflecting the importance of the subject for understanding deformed natural rocks (e.g., Gay, 1968; Ghosh and Sengupta, 1973; Ferguson, 1979; Fernandez et al., 1983; Freeman, 1985; Passchier and Simpson, 1986; Passchier, 1987; Ildefonse and Fernandez, 1988; Ildefonse et al., 1992a, b; Ildefonse and Mancktelow, 1993; Passchier and Sokoutis, 1993; Ježek, 1994; Ježek et al., 1994, 1996; Bjørnerud and Zhang, 1995; Marques and Cobbold, 1995; ten Brink and Passchier, 1995; Arbaret et al., 1996, 2001; Pennacchioni et al., 2000; Marques and Coelho, 2001; Mancktelow et al., 2002; Piazolo et al., 2002; Piazolo and Passchier, 2002; ten Grotenhuis et al., 2002; Ceriani et al., 2003; Mandal et al., 2003, 2005b, c; Fletcher, 2004; Marques and Bose, 2004; Marques, 2005; Marques et al., 2005a, b, c; Jiang, 2007a; Fay et al., 2008; Jessell et al., 2009; Johnson et al., 2009). Solutions for an isolated deformable ellipsoidal inclusion in an infinite matrix were initially established for linear elasticity (Robinson, 1951; Muskhelishvili, 1953; Eshelby, 1957, 1959).
A critique of vorticity analysis using rigid clasts
2011, Journal of Structural GeologyCitation Excerpt :However, rocks are likely non-Newtonian (Carter, 1975, 1976; Tullis, 1979; Kirby, 1983; Gleason and Tullis, 1995). Furthermore, many recent works have shown that clasts in rocks may not behave according to Jeffery’s theory because of interface slip between clasts and the surrounding material (Ildefonse and Mancktelow, 1993; Bjørnerud and Zhang, 1995; Marques and Cobbold, 1995; Pennacchioni et al., 2000; Mancktelow et al., 2002; Ceriani et al., 2003; Schmid and Podladchikov, 2004, 2005; Mandal et al., 2005; Mulchrone, 2007; Johnson et al., 2009), large clast size compared to the width of the shear zone (Marques and Coelho, 2001), and interaction among clasts (Ildefonse et al., 1992a, b; Marques and Bose, 2004; Mandal et al., 2005). Third, extrapolating the kinematics of a small scale to that of a regional scale essentially assumes that deformation kinematics is uniform across scales many orders of magnitude different, ignoring the heterogeneous nature of rock deformation and deformation partitioning (e.g., Lister and Williams, 1983).
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Present address: Department of Geological Sciences, The Ohio State University, Columbus, OH 43210, U.S.A.