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K/Ar Systematics of Bentonite and Shale in a Contact Metamorphic Zone, Cerrillos, New Mexico
Age dating Bentonite Contact metamorphism Illite Illite/smectite K/Ar ages
2012/1/12
To test the ability of illitic clay minerals to retain argon, K/Ar ages were measured on grain-size separates from the Cretaceous Mancos Shale and associated bentonites that have been transformed into...
Textural Variation and Composition of Bentonite Derived from Basaltic Ash
Basaltic ash Bentonite Chemical composition Hyaloclast Petrography Scanning electron microscopy Texture
2012/1/12
The Rokle bentonite deposit is part of an accumulation of argillized volcanoclastic rocks in the Tertiary stratovolcanic complex of the Doupovsk?Mountains east of Karlovy Vary (Carlsbad), about 100 km...
Mineralogy and Genetic Relationships of Tonstein, Bentonite, and Lignitic Strata in the Eocene Yegua Formation of East-Central Texas
Bentonite Clinoptilolite Kaolinite Lignite Smectite Tonstein Weathering
2012/2/6
A kaolinite-rich bed (tonstein) and an associated bentonite in the upper part of Yegua Formation at College Station, east-central Texas, were formed by in situ weathering processes in a late Eocene sw...
Interactions of Some Large Organic Cations with Bentonite in Dilute Aqueous Systems
Adsorption Bentonite Herbicide Organocations Smectite
2012/2/8
Adsorption studies indicate that paraquat, diquat, and thionine are bound on bentonite by amounts greater than the measured cation-exchange capacity (CEC) of the clay. Methylene blue, new methylene bl...
Formation of Polymeric Species in the Interlayer of Bentonite
Bentonite Hydrophobic Infrared spectroscopy Interlayer Polymerization
2012/2/10
Infrared spectroscopic, X-ray powder diffraction, diffuse reflectance, and electron-spin resonance examination of homoionic bentonite from Sardinia treated with diazomethane indicates that polymethyle...
Identification of Tetramethylammonium Ion in Methylated NH4-Bentonite
Bentonite Diazomethane Exchange Montmorillonite Tetramethylammonium
2011/11/18
Abstract: Treating NH4-bentonite with diazomethane results in methylation of adsorbed ammonium with the formation of the tetramethylammonium ion. This ion, which can be completely removed through ion ...
Internal Surface Area of Wyoming Bentonite from Swelling Relationships
Wyoming Bentonite Swelling Relationships Internal Surface Area
2012/2/13
The internal surface area of Na-Wyoming bentonite was determined for linearly swelling pastes, using a physically based equation which describes such swelling. Information required is simply the linea...
Bentonite Characteristics from Deposits near Rosalind, Alberta
Bentonite Characteristics Deposits
2012/2/15
Two bentonite deposits having average thicknesses of 10 and 4 ft are exposed within nonmarine strata of Late Cretaccous age along the Battle River near Rosalind, Alberta. They are characterized by sca...
On the Mechanism of the Adsorption of Trace Copper by Bentonite
Trace Copper Bentonite Mechanism Adsorption
2012/2/15
The adsorption of trace quantities of Cu (3·89 × 10−6 to 3·00 × 10−4 M) by a bentonite clay from calcium acetate solution was studied over the range of pH 4·27–5·87. The data were fitted t...
Abstract: The petrography of shale partings in carbonate rocks from eleven cores in the Illinois (Jeffersonville Formation) and Michigan Basins (Detroit River Formation) of Indiana indicates the prese...
Sealing with waterborne clays is a rapid and low cost method of controlling seepage through porous media whenever the clay source is within economical shipping distance of the sealing site. But more m...