A baseline study of mineralogical and morphological properties of different size fractions of illite du Puy

Asaad, Ali; Hubert, Fabien; Dazas, Baptiste; Razafitianamaharavo, Angélina; Brunet, Julien; Glaus, Martin A.; Savoye, S.; Ferrage, Eric; Tertre, Emmanuel

doi:10.1016/j.clay.2022.106517

Cited by 4 publications

(8 citation statements)

References 43 publications

(79 reference statements)

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“…A detailed discussion of the characterization results can be found in SI 11. Briefly, the comparison of the Fe K-edge XANES spectra inflection points of nontronite (Fe(III)-rich smectite) and olivine (Fe(II) neosilicate) with IdP A (Figure 1A) showed that Fe is predominantly present as Fe(III) with a minor fraction of 51 Wyoming smectite (SWy�red circles), 52 Fe-free montmorillonite (IfM�empty black squares). 40 The error bars refer to ±0.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Figure 2. Distribution coefficients (log K D ) of Np(V) on clay minerals (A) in dependence on pH at c 0 (Np(V)) = 1 × 10 −8 mol/L; (B) log K D of Np(V) in dependence on pH and contact time (t c ) at c 0 (Np(V)) = 1 × 10 −6 mol/L; Illite du Puy (IdP A�green signs, IdP B�blue signs),51 Wyoming smectite (SWy�red circles),52 Fe-free montmorillonite (IfM�empty black squares) 40. The error bars refer to ±0.25 log K D units on the single sorption experiments and to the 95% confidence interval of the quadruplicate sorption experiments.…”

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confidence: 99%

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Np(V) Retention at the Illite du Puy Surface

Schacherl

Joseph

Beck

et al. 2023

Environ. Sci. Technol.

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In this study, Np(V) retention on Illite du Puy (IdP) was investigated since it is essential for understanding the migration behavior of Np in argillaceous environments. The presence of structural Fe(III) and Fe(II) in IdP was confirmed by Fe K-edge X-ray absorption near-edge structure (XANES) and 57Fe Mössbauer spectroscopy. In batch sorption experiments, a higher Np sorption affinity to IdP was found than to Wyoming smectite or iron-free synthetic montmorillonite. An increase of the relative Np(IV) ratio sorbed onto IdP with decreasing pH was observed by solvent extraction (up to (24 ± 2)% at pH 5, c 0(Np) = 10–6 mol/L). Furthermore, up to (33 ± 5)% Np(IV) could be detected in IdP diffusion samples at pH 5. Respective Np M5-edge high-energy resolution (HR-) XANES spectra suggested the presence of Np(IV/V) mixtures and weakened axial bond covalency of the NpO2 + species sorbed onto IdP. Np L3-edge extended X-ray absorption fine structure (EXAFS) analysis showed that significant fractions of Np were coordinated to FeO entities at pH 9. This highlights the potential role of Fe(II/III) clay edge sites as a strong Np(V) surface complex partner and points to the partial reduction of sorbed Np(V) to Np(IV) via structural Fe(II).

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Section: ■ Results and Discussionmentioning

confidence: 99%

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confidence: 99%

Np(V) Retention at the Illite du Puy Surface

Schacherl

Joseph

Beck

et al. 2023

Environ. Sci. Technol.

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“…Mineralogical and physico-chemical properties of illite du Puy material (Puy-en-Velay, France), envisaged as a model clay system in the European Joint Programme on Radioactive Waste, were studied [151]. Gradual decrease in the mean crystallite size in ethylene-glycolated mount was found from the coarsest (0.2-2 µm fractio) to the <0.05 µm size fraction, with slight increase in the smectite layer content, and with no significant changes in particle aspect ratios.…”

Section: Muscovite Illite Vermiculitementioning

confidence: 99%

Applications of X-ray Powder Diffraction Microstructural Analysis in Applied Clay Mineralogy

Bastida,

Pardo-Ibañez

2024

Minerals

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Clay minerals and sheet silicates are the main constituents of lutites and clays. These materials are relevant in earth science research as well as in economic geology because of the great variety of applications, based on their particular features at different levels of aggregation in mineral assemblages and on the microstructural and structural characteristics of the mineral constituents frequently characterized by micro- and nanocrystalline appearance. Thus, X-ray diffraction is a main tool for fundamental and applied research of these materials. The present review concerns their microstructural research from powder X-ray diffraction data.

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“…The temperature threshold for the conversion of kaolinite to illite is 120 °C-140 °C. When the temperature exceeds this threshold, kaolinite converts to illite in large quantities and can form wiry illite (Blanc et al, 2021;Asaad et al, 2022). However, there was an abrupt segment in the study area's Frontiers in Earth Science frontiersin.org vitrinite reflectance (Ro) profile (Figure 11).…”

Section: Carbonate Cementationmentioning

confidence: 99%

“…Particularly, the Si 4+ released in Reaction two is approximately five times greater than that in Reaction 1, causing the severe quartz cementation observed in the P 3 w sandstones in the study area. The temperature at which montmorillonite starts to convert to illite is more remarkable at around 60 °C (Blanc et al, 2021;Asaad et al, 2022;Hueck et al, 2022). However, when the temperature exceeds 60 °C-100 °C, the silica released from the transitional reaction will be produced in the form of a quartz secondary increase (French and Worden, 2013;Oye et al, 2018;Fiedrich et al, 2020).…”

Section: Figure 10mentioning

confidence: 99%

The characteristics and genetic mechanisms of the Upper Permian Shangwuerhe clastic reservoir in the eastern Junggar Basin, Northwest China

Qin

Tang²,

Chang³

et al. 2023

Front. Earth Sci.

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In this paper, the lithology, pore type, throat structure, and physical characteristics of the sandstone and conglomerate reservoirs of the Upper Permian Shangwuerhe Formation in the Fukang Sag of the Junggar Basin were analyzed through rock cast thin section, scanning electron microscopy, fluid inclusions, piezometric mercury, and porosity–permeability analysis. In addition, the reservoir densification mechanism and the genesis of deep effective reservoirs were discussed. The results show that the reservoir is dominated by lithic sandstone (or lithic sandstone conglomerate). The lithic fragments primarily comprise tuffaceous volcanic rocks, supported by grains and cemented by clay, carbonate, authigenic quartz, and laumontite. The reservoir properties are characterized by extra-low porosity and permeability, and the pore type is dominated by inter- and intragrain dissolved pores of lithic fragments, feldspar, and quartz. The pore connectivity is poor due to poorly sorted extra-fine throat channels. The tightness of the reservoir.is due to the strong cementation of calcite, chlorite, montmorillonite, illite-montmorillonite mixed layer, authigenic quartz, and laumontite. Furthermore, the large amount of Ca2+ released by the hydration of tuff rock debris and intermediate–basic volcanic rock debris and the CO2-rich thermal fluid from the deep layers cause the development of several calcites. The formation of several montmorillonites is mainly related to the alteration of filled volcanic ash, and the hydration of volcanic tuff material primarily causes the development of laumontite cementation. The dissolution of feldspar and various volcanic lithic fragments by acidic fluids triggers the physical improvement of the reservoir in the local section.

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A baseline study of mineralogical and morphological properties of different size fractions of illite du Puy

Cited by 4 publications

References 43 publications

Np(V) Retention at the Illite du Puy Surface

Np(V) Retention at the Illite du Puy Surface

Applications of X-ray Powder Diffraction Microstructural Analysis in Applied Clay Mineralogy

The characteristics and genetic mechanisms of the Upper Permian Shangwuerhe clastic reservoir in the eastern Junggar Basin, Northwest China

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