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Re–Os isotope geochemistry in the surface layers of ferromanganese crusts from the Takuyo Daigo Seamount, northwestern Pacific Ocean
ferromanganese crust Re and Os isotopes geochemistry Takuyo Daigo Seamount northwestern Pacific Ocean
2017/4/10
Os isotope compositions in ferromanganese crusts (Fe–Mn crusts) have been used for the dating of model ages from
present to the Late Cretaceous. This dating method assumes that the Fe–Mn crusts prese...
Mn- and Fe-carbonate rich layers in Meso-Cenozoic shales as proxies of environmental conditions: A case study from the southern Apennine, Italy
geochemistry manganese Northern-Calabrian Unit rhodochrosite southern Italy
2017/8/9
Mn-rich layers and interbedded shales from a well exposed natural section of the Northern-Calabrian Unit (Late Jurassic-Early Oligocene) in the surroundings of the Terranova del Pollino village, south...
Anomalous Strong Reflections on High Resolution Seismic Data from the Turkish Shelf of the Eastern Black Sea: Possible Indicators of Shallow Hydrogen Sulphide-Rich Gas Hydrate Layers
Black Sea gas hydrate hydrogen sulphide high-resolution acoustic methods
2009/7/7
Some strong reflections about 3 to 5 m thick were observed at depths of 25-60 metres below the sea floor using deep-towed, 5 kHz subbottom profiler data in the Turkish shelf and upper slope of the Ea...
Stable Isotope Evolution of Volcanic Ash Layers during Diagenesis of the Miocene Monterey Formation, California
Bentonite Diagenesis Monterey Formation Stable Isotopes Volcanic Ash
2011/12/2
Abstract: The oxygen and hydrogen isotope compositions of volcanic ash layers from coastal outcrops of the Miocene Monterey Formation elucidate the progressive burial diagenesis of glass to bentonite ...
Pedogenic Formation of Kaolinite-Smectite Mixed Layers in a Soil Toposequence Developed from Basaltic Parent Material in Sardinia (Italy)
Basaltic Rock (Weathering) Kaolinite-Smectite Mixed Layers Sardinia Smectite-Layer Charge Soils
2011/12/7
Abstract: Formation of kaolinite-smectite (K-S) mixed layers in a soil toposequence developed from basaltic parent material was examined. The soil formed in a temperate climate with alternating dry an...
Swelling Pressure of Montmorillonite Layers versus H-O-H Bending Frequency of the Interlayer Water
Bending Frequency Hydration Infrared Spectroscopy Interlayer Force Interlayer Water Montmorillonite Swelling Pressure
2011/12/27
The in-depth perturbation of vicinal water by the surfaces of montmorillonite layers was investigated by relating the swelling pressure, Π, of the montmorillonite layers to the H-O-H bending frequency...
The nature of diffraction effects from illite and illite-smectite consisting of interstratified trans-vacant and cis-vacant 2:1 layers: A semiquantitative technique for determination of layer-type content
illite illite-smectite interstratified trans-vacant cis-vacant 2:1 layers semiquantitative technique layer-type content
2012/4/6
Previous workhas described the structural and diffraction criteria for distinguishing between tv-1M, cv-lM, and m-lM illite varieties, wheretv-1M illite corresponds to a structure withtrans vacant(tv)...
Dickite, Nacrite and Possible Dickite/Nacrite Mixed-Layers from the Betic Cordilleras (Spain)
Dickite Differential thermal analysis Infrared spectroscopy Mixed-layers Nacrite Very low-grade metamorphism X-ray powder diffraction
2011/12/23
Abstract: Nacrite, dickite and intermediate dickite-nacrite phases have been identified from the upper Paleozoic sequences of the Malúguide Complex (Betic Cordilleras, Spain). Nacrite developed as euh...
Interrelated Features of Structure and Stacking of Kaolin Mineral Layers
Dickite Halloysite Kaolinite Polytypism Stacking faults
2011/12/23
Abstract: Layer stackings in the ideal and real kaolinite structures are considered in terms of layer orientations i = 1, 2, ˇ 6, intra- and interlayer displacements of adjacent 0- and T-sheets, si an...
Change in Layer Charge of Smectites and Smectite Layers in Illite/Smectite during Diagenetic Alteration
Beidellitization Charge Location Diagenesis Greene-Kelly Test Illite/Smectite Layer Charge Smectite
2011/12/27
Abstract: The changes in amount and location of layer charge during diagenetic alteration have been investigated for smectites and smectite layers of illite/smectite interstratified minerals (I/S) by ...
Some Evidence Supporting the Existence of Polar Layers in Mixed-Layer Illite/Smectite
Differential Thermal Analysis Mixed-layer illite/smectite Polar layer
2011/12/28
The fraction <20 祄 of a bentonitic material was selected to study the transformation of smectite into illite under hydrothermal conditions. Powder XRD showed that the studied material was composed of ...
Microfabric of Altered Ash Layers, ODP LEG 131, Nankai Trough
Accretionary prism Alteration Ash Microfabric Nankai Trough Physical properties Porosity
2011/12/29
Samples of ash layers and associated background sediments from Site 808 of ODP Leg 131 in the Nankai Trough accretionary prism were analyzed for changes in mineralogy, porosity and microfabric associa...
Effect of 1,4-Dioxane on the Expansion of Montmorillonite Layers in Montmorillonite/Water Systems
1,4-dioxane Layer expansion Montmorillonite Swelling
2011/12/28
Suspensions were produced by mixing Na-saturated, Upton montmorillonite with aqueous solutions containing different concentrations of 1,4-dioxane. Each suspension was deposited on a porous ceramic fil...
Compositional Variation in Component Layers in Natural Illite/Smectite
Bentonite Cation-exchange capacity Diagenesis Hydrothermal Illite Interstratification Smectite
2012/1/13
Published chemical data for suites of mixed-layer minerals from diagenetic sedimentary rocks, hydrothermally altered tufts, and a metasomatic bentonite bed indicate that the layer charge and compositi...
Electrical Potential Between Dissimilar Clay Double Layers
Double layer Electrolyte Film thickness Montmorillonite Surface charge Water
2011/11/23
Abstract: A model describing the electric double layers in clay-electrolyte systems containing particles with different surface charge densities was developed and used to calculate the film thickness ...