Geochemical characterization and modelling of the Toarcian/Domerian porewater at the Tournemire underground research laboratory

Trémosa, Joachim; Arcos, David; Matray, Jean-Michel; Bensenouci, F.; Gaucher, Éric C.; Tournassat, Christophe; Hadi, Jebril

doi:10.1016/j.apgeochem.2012.01.005

Cited by 46 publications

(26 citation statements)

References 33 publications

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“…This marly formation is composed by a clay fraction equal to 50%, in the upper Toarcian, riches in the 2 minerals, illite and smectite mixed (with 50-90% of illite) and some detrital micas (Trémosa et al, 2012); 10-20% of quartz grains and silt, 10-40% of carbonates (mainly calcite with traces of dolomite and siderite) and 2-7% of pyrite.…”

Section: Geological Backgroundmentioning

confidence: 99%

Temporal behavior of a ventilated claystone at the Tournemire URL: Cross-spectral analyses focused on daily harmonics

Bailly

Matray

Ababou

2014

Engineering Geology

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Section: Geological Backgroundmentioning

confidence: 99%

Temporal behavior of a ventilated claystone at the Tournemire URL: Cross-spectral analyses focused on daily harmonics

Bailly

Matray

Ababou

2014

Engineering Geology

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“…The average mineralogical composition of Tournemire shale is detailed in Table 1 [Tremosa et al, 2012]. We note the presence of an important amount of swelling clay minerals such as illite and smectite.…”

Section: Tournemire Shale Description and Sample Preparationmentioning

confidence: 96%

Elastic wave velocity evolution of shales deformed under uppermost crustal conditions

et al. 2017

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Conventional triaxial tests were performed on a series of samples of Tournemire shale along different orientations relative to bedding (0°, 90°). Experiments were carried out up to failure at increasing confining pressures ranging from 2.5 to 80 MPa, and at strain rates ranging between 3 × 10−7 s−1 and 3 × 10−5 s−1. During each experiment, P and S wave elastic velocities were continuously measured along many raypaths with different orientations with respect to bedding and maximum compressive stress. This extensive velocity measurement setup allowed us to highlight the presence of plastic mechanisms such as mineral reorientation during deformation. The evolution of elastic anisotropy was quantified using Thomsen's parameters which were directly inverted from measurement of elastic wave velocity. Brittle failure was preceded by a change in P wave anisotropy, due to both crack growth and mineral reorientation. Anisotropy variations were largest for samples deformed perpendicular to bedding, at the onset of rupture. Anisotropy reversal was observed at the highest confining pressures. For samples deformed parallel to bedding, the P wave anisotropy change is weaker.

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“…The mean features of the pore water chemistry at ambient temperature are summarised in Table 1 [21]. The mean porosity and effective diffusion coefficient of the argillite are 10% and 2×10 -11 m 2 /s (at 20°C), respectively.…”

Section: In Situ Clayey Rockmentioning

confidence: 99%

Impact of a 70 °C temperature on an ordinary Portland cement paste/claystone interface: An in situ experiment

Lalan

Dauzères

Windt

et al. 2016

Cement and Concrete Research

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Geochemical characterization and modelling of the Toarcian/Domerian porewater at the Tournemire underground research laboratory

Cited by 46 publications

References 33 publications

Temporal behavior of a ventilated claystone at the Tournemire URL: Cross-spectral analyses focused on daily harmonics

Temporal behavior of a ventilated claystone at the Tournemire URL: Cross-spectral analyses focused on daily harmonics

Elastic wave velocity evolution of shales deformed under uppermost crustal conditions

Impact of a 70 °C temperature on an ordinary Portland cement paste/claystone interface: An in situ experiment

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