Physical approach to the problem of origin of charnockitic rocks of southern India: Mechanisms of crustal heating and transfer of carbon dioxide

Gliko, A. O.; Singh, R. N.; Swathi, P. S.

doi:10.2205/1999es000019

Cited by 5 publications

(4 citation statements)

References 47 publications

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“…; Connolly ; Gliko et al . ; Ague ; Tian & Ague ), their expression in nature would be complicated by a number of factors. These factors, which include geometry, lithological heterogeneity, tectonic stress, and rheological variations, have been reviewed elsewhere (Connolly & Podladchikov , ).…”

Section: Discussionmentioning

confidence: 99%

“…; Connolly ; Gliko et al . ; Tian & Ague ) are less exotic than seem at first sight. No attempt to make the case for the role of porosity waves in the lower crust is made in this study; rather, the reader is referred to the aforementioned work and recent reviews (Connolly & Podladchikov ; Ague ) that consider the relevance of the model and the hydraulic properties of the crust in greater detail.…”

Section: Introductionmentioning

confidence: 90%

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An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

Connolly

Podladchikov

2014

Geofluids

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Porosity waves are a mechanism by which fluid generated by devolatilization and melting, or trapped during sedimentation, may be expelled from ductile rocks. The waves correspond to a steady-state solution to the coupled hydraulic and rheologic equations that govern flow of the fluid through the matrix and matrix deformation. This work presents an intuitive analytical formulation of this solution in one dimension that is general with respect to the constitutive relations used to define the viscous matrix rheology and permeability. This generality allows for the effects of nonlinear viscous matrix rheology and disaggregation. The solution combines the porosity dependence of the rheology and permeability in a single hydromechanical potential as a function of material properties and wave velocity. With the ansatz that there is a local balance between fluid production and transport, the solution permits prediction of the dynamic variations in permeability and pressure necessary to accommodate fluid production. The solution is used to construct a phase diagram that defines the conditions for smooth pervasive flow, wave-propagated flow, and matrix fluidization (disaggregation). The viscous porosity wave mechanism requires negative effective pressure to open the porosity in the leading half of a wave. In nature, negative effective pressure may induce hydrofracture, resulting in a viscoplastic compaction rheology. The tubelike porosity waves that form in such a rheology channelize fluid expulsion and are predicted by geometric argumentation from the one-dimensional viscous solitary wave solution.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

Connolly

Podladchikov

2014

Geofluids

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“…The solution provides a simple means of estimating the scales of pressure and porosity (or permeability) variations as a function of fluid production rates and constitutive relations. Although porosity waves have been posited as a mechanism for fluid flow in the lower crust (Suetnova et al 1994;Connolly 1997;Gliko et al 1999;Ague 2014;Tian & Ague 2014), their expression in nature would be complicated by a number of factors. These factors, which include geometry, lithological heterogeneity, tectonic stress, and rheological variations, have been reviewed elsewhere (Connolly & Podladchikov 2004.…”

Section: Discussionmentioning

confidence: 99%

“…The existence of porosity waves in a viscous matrix has also been demonstrated experimentally by mechanical analog (Olson & Christensen 1986;Helfrich & Whitehead 1990). Thus, suggestions that porosity waves act as agents for compartmentalization and fluid migration in sedimentary basins (McKenzie 1987;Connolly & Podladchikov 2000;Appold & Nunn 2002) and the lower crust (Suetnova et al 1994;Connolly 1997; Gliko et al 1999;Tian & Ague 2014) are less exotic than they might seem at first sight. We make no attempt to make the case for the role of porosity waves in the lower crust in this study; rather, the reader is referred to the aforementioned works and recent reviews (Connolly & Podladchikov 2013; Ague 2014) that consider the relevance of the model and the hydraulic properties of the crust in greater detail.…”

Section: Introductionmentioning

confidence: 91%

An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

Connolly

Podladchikov

2012

Crustal Permeability

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Porosity waves are a mechanism by which fluid generated by devolatilization and melting, or trapped during sedimentation, may be expelled from ductile rocks. The waves correspond to a steady-state solution to the coupled hydraulic and rheologic equations that govern the flow of the fluid through the matrix and matrix deformation. This chapter presents an intuitive analytical formulation of this solution in one dimension that is general with respect to the constitutive relations used to define the viscous matrix rheology and permeability. This generality allows for the effects of nonlinear viscous matrix rheology and disaggregation. The solution combines the porosity dependence of the rheology and permeability in a single hydromechanical potential as a function of material properties and wave velocity. With the ansatz that there is a local balance between fluid production and transport, the solution permits the prediction of dynamic variations in permeability and pressure necessary to accommodate fluid production. The solution is used to construct a phase diagram that defines the conditions for smooth pervasive flow, wave-propagated flow, and matrix fluidization (disaggregation). The viscous porosity wave mechanism requires negative effective pressure to open the porosity in the leading half of a wave. In nature, negative effective pressure may induce hydrofracture, resulting in a viscoplastic compaction rheology. The tube-like porosity waves that form in a matrix with this rheology channelize fluid expulsion and are predicted by geometric argumentation from the one-dimensional viscous solitary wave solution.

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References

2012

Crustal Permeability

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A simple predictive model of quartz solubility in water-salt-C02 systems at temperatures up to 1000 ∘ C and pressures up to 1000 MPa. Geochimica Cosmochimica Acta, 76, 1597-1608. Allen DM, Grasby SE, Voormeij DA (2006) Determining the circulation depth of thermal springs in the southern Rocky Mountain Trench, southeastern British Columbia, Canada using geothermometry and borehole temperature logs.

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Physical approach to the problem of origin of charnockitic rocks of southern India: Mechanisms of crustal heating and transfer of carbon dioxide

Cited by 5 publications

References 47 publications

An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

An analytical solution for solitary porosity waves: dynamic permeability and fluidization of nonlinear viscous and viscoplastic rock

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