Isotopic and fluid inclusion studies of fluid movement along the Gavarnie Thrust, central Pyrenees; reaction fronts in carbonate mylonites

McCaig, A. M.; Wayne, David M.; Marshall, J. D.; Banks, DA; Henderson, I. H. C.

doi:10.2475/ajs.295.3.309

Cited by 81 publications

(53 citation statements)

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“…Fluid flow related to the Gavarnie thrust in, and immediately above, the basement was further investigated by Grant et al (1990), Banks et al (1991), McCaig et al (1995. Fluid flow through the thrusted Cretaceous-Palaeocene limestones was studied by Rye & Bradbury (1988).…”

Section: Geological Settingmentioning

confidence: 99%

“…Recent geophysical investigations and in-situ measurements in active accretionary prisms reveal the occurrence of present-day pore-fluid overpressure and circulation in fault zones, and the importance of this circulation in diagenesis and heat transfer (Moore & Vrolijk, 1992;Shipley et al 1994;Moore et al 1995). However, the study of ancient structures remains the main opportunity to unravel complex fluid flow patterns and fluid-rock interactions in thrust systems, through the combination of structural, mineralogical, geochemical, and fluid-inclusion analyses (e.g., Marquer & Burkhard 1992;Guilhaumou et al 1994;McCaig et aL 1995;Muchez et al 1995).…”

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confidence: 99%

“…Indeed, calcite veins which precipitated in the Cretaceous substratum of the Ainsa basin from fluids having this origin show significantly lower Sr content and higher 87Sr/86Sr ratio (McCaig et aL 1995) than the Arro syncline veins, where (i) the Sr content is high and (ii) the 87Sr/86Sr ratio and the ~348 of the connate water were not modified. A more probable origin for the deep fluid is the dewatering of the most deeply buried Eocene sediments at the inner edge of the Ainsa basin, where vein calcite shows Sr content and 87Sr/86Sr ratio values (McCaig et al 1995) similar to those found in the Arro syncline calcite. The circulation of this fluid mainly took place within the discontinuity planes formed by the veins, and was expelled upwards without producing any exchange within the marls immediately adjacent to the veins.…”

mentioning

confidence: 99%

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Fluid migration during Eocene thrust emplacement in the south Pyrenean foreland basin (Spain): an integrated structural, mineralogical and geochemical approach

Travé

Labaume

Calvet

et al. 1998

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In the frontal part of the south Pyrenean Eocene thrust-fault system, syn-kinematic fluid flow during the early compressional deformation of the foreland basin marls is evidenced macroscopically by the abundance of calcite shear veins within the thrust-fault zones and folds.The geometry and distribution of the veins are indicative of the mechanisms and kinematics of fluid-deformation relationships, and give assessment of the fluid migration paths. The crack-seal mechanism of formation of the shear veins attests to the episodic nature of fault-slip and associated fluid flow in fractures. The distribution of the veins suggests that the main source of fluid was the dewatering of the overpressured, poorly permeable marls from the thrust footwalls, probably related to both (i) vertical compaction due to burial under thrust sheets and (ii) tectonic horizontal shortening. These fluids drained upwards towards the thrust-fault zones, in which they migrated laterally towards the thrust front due to the anisotropy of the fracture permeability in these zones.

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Section: Geological Settingmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Fluid migration during Eocene thrust emplacement in the south Pyrenean foreland basin (Spain): an integrated structural, mineralogical and geochemical approach

Travé

Labaume

Calvet

et al. 1998

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“…The growth of crystals in dilation sites is of great importance in many fields of applied and basic earth science, because of the associated large changes in transport properties and rock strength (Blanpied et al, 1992;McCaig et al, 1995;Cox et al, 2001). A wide range of microscale processes has been identified, which, usually coupled, may contribute to the evolution of veins (Fisher and Brantley, 1992;Renard et al, 2000).…”

Section: Introductionmentioning

confidence: 97%

Microstructural evolution of syntaxial veins formed by advective flow

Hilgers

Dilg-Gruschinski

Urai

2004

Geol

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“…McCaig et al 1995); and (2) vein formation dominated by diffusional transport (e.g. Jamtveit & Yardly DEFORMATION MECHANISMS, RHEOLOGY & TECTONICS 5 1997;Bons 2000).…”

Section: Channelized and Pervasive F L U I D F L O Wmentioning

confidence: 99%

Current issues and new developments in deformation mechanisms, rheology and tectonics

Meer

Drury

Bresser

et al. 2002

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Abstract:We present a selective overview of current issues and outstanding problems in the field of deformation mechanisms, rheology and tectonics. A large part of present-day research activities can be grouped into four broad themes. First, the effect of fluids on deformation is the subject of many field and laboratory studies. Fundamental aspects of grain boundary structure and the diffusive properties of fluid-filled grain contacts are currently being investigated, applying modern techniques of light photomicrography, electrical conductivity measurement and Fourier Transform Infrared (FTIR) microanalysis. Second, the interpretation of microstructures and textures is a topic of continuous attention. An improved understanding of the evolution of recrystallization microstructures, boundary misorientations and crystallographic preferred orientations has resulted from the systematic application of new, quantitative analysis and modelling techniques. Third, investigation of the theology of crust and mantle minerals remains an essential scientific goal. There is a focus on improving the accuracy of flow laws, in order to extrapolate these to nature. Aspects of strain and phase changes are now being taken into account. Fourth, crust and lithosphere tectonics form a subject of research focused on large-scale problems, where the use of analogue models has been particularly successful. However, there still exists a major lack of understanding regarding the microphysical basis of crust-and lithosphere-scale localization of deformation.

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Isotopic and fluid inclusion studies of fluid movement along the Gavarnie Thrust, central Pyrenees; reaction fronts in carbonate mylonites

Cited by 81 publications

References 0 publications

Fluid migration during Eocene thrust emplacement in the south Pyrenean foreland basin (Spain): an integrated structural, mineralogical and geochemical approach

Fluid migration during Eocene thrust emplacement in the south Pyrenean foreland basin (Spain): an integrated structural, mineralogical and geochemical approach

Microstructural evolution of syntaxial veins formed by advective flow

Current issues and new developments in deformation mechanisms, rheology and tectonics

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