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Reaction Mechanisms of Smectite Illitization Associated with Hydrothermal Alteration from Ponza Island, Italy
Atomic Force Microscopy Chemical Analysis Illite Polytype Smectite XRD
2011/12/6
Abstract: A hydrothermally altered rhyolitic hyaloclastite from Ponza island, Italy, has four alteration zones with unique clay assemblages: (1) a non-pervasive argillic zone characterized by smectite...
Evolution of Fundamental-Particle Size during Illitization of Smectite and Implications for Reaction Mechanism
Crystal Growth Fundamental Particle Illite-Smectite Illitization Mechanism Lognormal Distribution Ostwald Ripening
2011/12/6
Abstract: Area-weighted thickness distributions of fundamental illite particles for samples of illite and illite-smectite from seven locations (including bentonites and hydrothermally altered pyroclas...
Transmission Electron Microscopy Study of Illitization in Pelites from the Iberian Range, Spain: Layer-by-Layer Replacement?
Analytical Electron Microscopy I-S Illite Illitization Process Polytypism Prograde Diagenesis Scanning Electron Microscopy Transmission Electron Microscopy
2011/12/6
Abstract: A sequence of interstratified illite-smectite (I-S) and illite in Paleozoic pelites and metapelites from the Iberian Range, Spain, was studied by X-ray diffraction (XRD), scanning electron m...
Smectite Illitization in Pliocene-Age Gulf of Mexico Mudrocks
Clay Diagenesis Core Analysis Gulf of Mexico Illite Smectite TEM XRD
2011/12/1
Abstract: Utilizing high-resolution transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD) techniques, we have studied the transition from shallower s...
Comparison of Structural Models of Mixed-Layer Illite/Smectite and Reaction Mechanisms of Smectite Illitization
Illite Illite/Smectite Mixed-Layer Reaction Mechanism Smectite
2011/12/22
Abstract: This paper compares mechanisms of the reaction of smectite to illite, in light of structural models for interstratified illite/smectite (I/S). The crystal structure of I/S has been described...
Mechanism of Illitization of Bentonites in the Geothermal Field of Milos Island Greece: Evidence Based on Mineralogy, Chemistry, Particle Thickness and Morphology
Bentonite Hydrothermal alteration Illitization Illite/smectite Kaolinite Neoformation Ostwald ripening Solid state transformation
2011/12/28
Hydrothermal alteration has caused illitization along a 40m vertical profile in the Tsantilis bentonite deposit, Eastern Milos, Greece which consists principally of a Wyoming-type montmorillonite and ...
Aspects on the Illitization of the Kinnekulle Bentonites
Bentonite Illitization Smectites
2011/12/28
Earlier interpretations of the conversion of the virgin smectite of the Ordovician Kinnekulle K-bentonites into the present mixed-layer illite/smectite imply that it took place through charge increase...
Changes in Particle Morphology During Illitization: An Experimental Study
Illitization Morphology Particle TEM
2011/12/29
Smectite was reacted at several temperatures between 200°C and 500°C to produce interstratified illite/smectite (I/S) with different proportions of expandable layers. Dispersed and sedimented products...
Effects of Octahedral Mg2+ and Fe3+ Substitutions on Hydrothermal Illitization Reactions
Illite/smectite Illitization Interstratification Octahedral substitution Synthesis
2012/1/4
Three gels of illitic composition having different octahedral substitutions were hydrothermally treated in distilled water at 300°C and 500 bars for 7 to 90 days. The gel of the composition K0.7Al2.0(...
Characterization of Illitization of Smectite in Bentonite Beds at Kinnekulle, Sweden
Bentonite Diagenesis Illite/smectite Illitization Transmission electron microscopy X-ray powder diffraction
2012/1/4
Structure, morphology, and chemical composition of illite/smectite (I/S) containing 30–50% smectite layers (% S) from Kinnekulle bentonites, Sweden, of diagenetic origin were examined using X-ray powd...
Layer-by-Layer Mechanism of Smectite Illitization and Application to a New Rate Law
Illitization Interstratification Layer mechanism Rate law Smectite Solid-state transformation
2012/1/11
A layer-by-layer mechanism explains important features of mixed-layer clay minerals formed during the illitization of smectite, including the occurrence of randomly interstratified illite/smectite, th...
Pathways of Smectite Illitization
Illite/smectite Illitization Junction probability diagram Mixed layer Ordering Smectite
2012/1/11
Junction probability diagrams show variation in both composition and layer arrangement in mixed-layer clay minerals. These diagrams can represent short-range and long-range ordered, random, and segreg...
Montmorillonite-Alkali Halide Interaction: A Possible Mechanism for Illitization
Montmorillonite-Alkali Halide Interaction Mechanism Illitization
2012/2/15
The reaction products obtained when montmorillonites react with potassium halide at elevated temperatures, which were described in a previous publication, are further characterized. On the basis of th...