Modelling the coupled heterogeneities of the lacustrine microbialite-bearing carbonate reservoir of the Yacoraite Formation (Salta, Argentina)

Télès, Vanessa; Hamon, Youri; Deschamps, Rémy; Rohais, Sébastien; Nader, Fadi H.; Heckenmeyer, Elodie; Gasparrini, Marta; Barbier, Mickaël; Lerat, Olivier; Joseph, Philippe; Doligez, Brigitte

doi:10.5802/crgeos.187

Cited by 3 publications

(2 citation statements)

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“…The stratigraphic architecture of the Yacoraite Fm. was primarily controlled by climate changes [30,38] and the sedimentation pattern and stratigraphic framework are characterised by multiple hierarchies of cyclicity [30,38,[57][58][59]63,[76][77][78][79]. The present study considers the mid-term cyclicity reported by [30,38] for the Metán-Alemania sub-basins.…”

Section: Geological Contextmentioning

confidence: 99%

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

et al. 2023

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The Yacoraite Fm. (Salta rift basin, Argentina) consists of a mixed carbonate–siliciclastic lacustrine succession, interbedded with volcanic ash layers and organised in four third-order stratigraphic sequences. It is one of the few sites in South America that encompass the Cretaceous–Paleogene (K–Pg) transition, the position of which remains debated. Here, samples were collected along a depocentral stratigraphic section that was previously dated by zircon and carbonate U-Pb geochronology. The consistency between zircon and carbonate U-Pb ages, together with an accurate petrographic analysis, allowed the selection of carbonates potentially preserving the original geochemical signature. Accordingly, C-O stable isotopes were analysed from microbialites, oncoids, ooids and lacustrine cements. The available depositional age model from zircon geochronology defined the stratigraphic interval, potentially including the K–Pg transition. Within this interval, carbonates provided negative δ13C values consistent with the negative C anomaly recorded in various K–Pg sites elsewhere. Additionally, spherical particles resembling spherulites related to meteorite impacts were found in two samples. Accordingly, the K–Pg transition could be placed at the top of the second stratigraphic sequence. These findings encourage further investigation of the Yacoraite Fm. to gain insights into the response of South American terrestrial settings to the K–Pg palaeoenvironmental crisis.

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Section: Geological Contextmentioning

confidence: 99%

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

et al. 2023

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“…Chihi et al [2023] present a geostatistical analysis of a multiscale groundwater reservoir system, combining geological-geophysical investigations, geostatistics, and 3D geological modelling in the Jeffara basin of southeast Tunisia. The behaviour of a complex heterogeneous lacustrine carbonate formation in Argentina is modelled by Teles et al [2023], using a bivariate plurigaussian geostatistical method to constrain the porosity simulation. Last, de Fouquet and Nos [2023] discuss the cokriging of transmissivity using head measurements and show that the estimation is improved in comparison with the case of head data from a single flow.…”

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confidence: 99%

A hydrogeological acrostic: in honour of Ghislain de Marsily

Andréassian,

Plagnes,

Simmons

et al. 2024

Comptes Rendus. Géoscience

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Stochastic Periodic Microstructures for Multiscale Modelling of Heterogeneous Materials

Ricketts

2024

Transp Porous Med

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Plurigaussian simulation is a method of discrete random field generation that can be used to generate many complex geometries depicting real world structures. Whilst it is commonly applied at larger scales to represent geological phenomena, the highly flexible approach is suitable for generating structures at all scales. Here, an extension of plurigaussian simulation to periodic plurigaussian simulation (P-PGS) is presented, such that the resulting fields are periodic in nature. By using periodic Gaussian random fields as components of the method, periodicity is enforced in the generated structures. To substantiate the use of P-PGS in capturing complex heterogeneities in a physically meaningful way, the pore-scale microstructure of cement paste was represented such that its effective properties can be calculated through a computational homogenisation approach. The finite element method is employed to model the diffusion of heat through the medium under dry and saturated pore conditions, where numerical homogenisation is conducted to calculate the effective thermal conductivity of the medium. Comparison of the calculated values with experimental observations indicated that the generated microstructures are suitable for pore-scale representation, given their close match. A maximal error of 1.38% was observed in relation to the numerically determined effective thermal conductivity of mortar paste with air filled pores, and 0.41% when considering water filled pores. As the assumption of a periodic domain is often an underlying feature of numerical homogenisation, this extension of plurigaussian simulation enables a path for its integration into such computational schemes. Article Highlights Integrating P-PGS into numerical homogenisation frameworks enhances complex heterogeneous material representation The flexibility of P-PGS enables a wide range of material microstructures to be represented accurately Use of the generated structures allows material properties to be estimated accurately through numerical homogenisation

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Modelling the coupled heterogeneities of the lacustrine microbialite-bearing carbonate reservoir of the Yacoraite Formation (Salta, Argentina)

Cited by 3 publications

References 59 publications

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

A Lacustrine Record for the Cretaceous–Paleogene Boundary—Yacoraite Fm., (Northwest Argentina)

A hydrogeological acrostic: in honour of Ghislain de Marsily

Stochastic Periodic Microstructures for Multiscale Modelling of Heterogeneous Materials

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