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Comparative study of the effects of thermal and mechanical treatments on the structures of clay minerals
clay minerals grinding and thermal treatments reactivity structural changes
2011/11/10
Controlled heating (in air) of clay minerals leads to transformations into disordered structures and recrystallization into new phases at high temperatures. These phase transformations are of topotact...
Comparative Study of the Mobility of Major and Trace Elements During Alteration of an Andesite and a Rhyolite to Bentonite, in the Islands of Milos and Kimolos, Aegean, Greece
Alteration Andesite Bentonite Element Mobilization Mordenite Phosphates REE Fractionation Residual Enrichment Rhyolite Smectite Water:Rock Ratio
2011/12/8
Abstract: Progressive alteration by seawater of an andesite in the Aegean Island of Milos and an ignimbrite in the Aegean Island of Kimolos, Greece, formed bentonites with or without zeolites. Both pr...
Cation Exchange Capacity of Layer Silicates and Palagonitized Glass in Mafic Volcanic Rocks: A Comparative Study of Bulk Extraction and In Situ Techniques
Cation Exchange Capacity Corrensite Electron microprobe analysis Extractable cations Palagonite Smectite
2011/12/27
The cation exchange capacities (CEC) and extractable cations in smectite, corrensite and palagonitized glass from hydrothermally-altered pillow lavas and hyaloclastite breccias were measured by both b...
A Comparative Study of Thermal Effects on Surface and Structural Parameters of Natural Californian and Quebec Chrysotile Asbestos up to 700°C
Thermal Effects Quebec Chrysotile Asbestos surface area
2012/2/13
The effect of heat treatment on surface area, pore volume, pore size distribution, physical and chemical structure up to 700°C have been studied on samples of naturally occurring chrysotile minerals f...
A Comparative Study of Simulated and Natural Weathering of Some Oklahoma Shales
Oklahoma Shales Natural Weathering mineralogical characteristics
2011/11/18
Abstract: Shales from six locations in Oklahoma were subjected to natural weathering for 2 yr. Simulated weathering of these shales was effected in the laboratory by subjecting them to ultrasonic trea...
A Comparative Study of the Diagenetic Alteration of Clay Minerals in Mesozoic Shales from Papua, New Guinea, and in Tertiary Shales from Louisiana, U.S.A.
Diagenetic Alteration Clay Minerals Mesozoic Shales
2011/11/17
Abstract: Gradual change from 60% montmorillonite/40% illite randomly interstratified clay minerals at 3500 ft depth to 20% montmorillonite/80% illite at 10,200 ft can be observed in a complete sectio...