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Geophagy: The Potential Risk of Sand Impaction.
Tensile strength of sand, palygorskite and calcium carbonate mixtures and interpretation with the effective stress theory
Indirect tensile strength Palygorskite Calcium carbonate Effective stress Compaction Central Iran
2011/11/4
Many soils in arid regions of the world including those of central Iran contain palygorskite and carbonates in their mineral fraction. There is, however, little information on the effects of these min...
Clay Dispersion and Hydraulic Conductivity of Clay-Sand Mixtures as Affected by the Addition of Various Anions
Illite Kaolinite Organic anions Smectite
2011/12/31
The effect of anions on clay dispersion and the hydraulic conductivity (HC) of clay-sand mixtures has received little attention. This study investigates the effect that adding small amounts of anions ...
Chlorite Vermiculitization and Pyroxene Etching in an Aeolian Periglacial Sand Dune, Allen County, Indiana
Chlorite Denticulations Dunes Etching Hydroxy-Al Indiana Pleistocene Pyroxene Vermiculite Weathering
2012/1/4
Weathering has etched and deeply-denticulated the constituent orthopyroxenes, and chlorite has been transformed to vermiculite in the upper 3 m of an aeolian, periglacial sand dune formed in northeast...
Effect of Na-Hexametaphosphate on the Hydraulic Conductivity of Kaolinite-Sand Mixtures
Dispersion Hexametaphosphate Hydraulic conductivity Kaolinite Sand Sodium adsorption ratio
2011/12/31
Mixtures of kaolinite clay and quartz sand were packed in columns and leached with NaCl-CaCl2 solutions of different concentrations (ranging from 0.5 M to distilled water) having sodium adsorption rat...
Clay-Organic Complexes as a Cementing Agent in the Arahama Sand Dune, Japan
Cementing agent Clay-organic complex Gel Sand dune Scanning auger multiprobe analysis Transmission electron microscopy X-ray photoelectron spectroscopy
2012/1/5
Cementing materials in the Arahama sand dune, Japan, were studied mineralogicaUy and biogeochemically to gain a better understanding of the cause of hardening. The cementing material is a clay- organi...
Weathering of Iron-Bearing Minerals in Soils and Saprolite on the North Carolina Blue Ridge Front: I. Sand-Size Primary Minerals
Almandine Biotite Chlorite Iron Magnetite Saprolite Soils Weathering
2011/11/30
Abstract: The weathering products of primary biotite, chlorite, magnetite, and almandine in mica gneiss and schist in the North Carolina Blue Ridge Front were determined. Sand-size grains of biotite, ...
Effect of Magnesium on the Hydraulic Conductivity of Na-Smectite-Sand Mixtures
Charge density Dispersion Hydraulic conductivity Magnesium Salinity Smectite Swelling
2012/1/10
Changes in hydraulic conductivity (HC) and clay dispersion of smectite-sand mixtures as a function of exchangeable Na in Na-Ca and Na-Mg systems were measured. The charge density on the smectites had ...
Effect of Exchangeable Potassium on the Hydraulic Conductivity of Smectite-Sand Mixtures
Hydraulic conductivity Potassium Salinity Sand Smectite Swelling
2012/1/11
Changes in hydraulic conductivity of smectite-sand mixtures (using four reference smectites) as a function of the concentration (0.01, 0.003, 0.002, 0.001 M Cl- and distilled water) and potassium adso...
Effect of Clay Mineralogy and Aluminum and Iron Oxides on the Hydraulic Conductivity of Clay-Sand Mixtures
Aluminum oxide Exchangeable sodium percentage Hydraulic conductivity Illite Iron oxide Montmorillonite Salinity Sand
2012/2/2
Changes in hydraulic conductivity and clay dispersivity of clay-sand mixtures (four reference smectites and Fithian illite) as a function of concentration (0.01 M Cl− and distilled water) and so...
Formation and Characterization of Clay Complexes with Bitumen from Athabasca Oil Sand
Bitumen Clay-organic complex Infrared Montmorillonite Oil sand X-ray powder diffraction
2012/2/9
Montmorillonite, kaolinite, illite, and chlorite were found to adsorb bitumen and its pentane-soluble and pentane-insoluble fractions. The formation of clay-bitumen complexes is influenced by the natu...