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Burial Diagenesis in Two Montana Tertiary Basins
Diagenesis Illite Illite/smectite Smectite Tarasovite Volcaniclastic
2011/12/31
Samples from initially smectite-rich Tertiary continental volcaniclastic sediment from the Deer Lodge and Big Hole basins of southwestern Montana show a general decrease in illite/smectite (I/S) expan...
Role of Iron Reduction in the Conversion of Smectite to Illite in Bentonites in the Disturbed Belt, Montana
Bentonite Illite Iron reduction Mixed layer Montana Smectite
2012/2/10
Cretaceous bentonites were collected in outcrop from the Sweetgrass Arch and the Disturbed Belt in Montana. The mixed-layer illite-smectite (I/S) components of the bentonites from the Sweetgrass Arch ...
Regularly Interstratified Chlorite桪ioctahedral Smectite in Dike-Intruded Shales, Montana
Chlorite Dioctahedral Smectite Dike-Intruded Shales
2012/2/15
Corrensite or 慶orrensite-like?minerals occur in dike-intruded shales and siltstones of the Montana Group and Colorado Group (Early Cretaceous) in Western Montana. The < 1 祄 size fraction of one specim...
Electron-Optical Study of Hydrothermal Fringe Alteration of Plagioclase in Quartz Monzonite, Butte District, Montana
Electron-Optical Study Hydrothermal Fringe Alteration Plagioclase Quartz Monzonite
2012/2/21
Plagioclase feldspar is one of the outermost minerals destroyed in the hydrothermal alteration of quartz monzonite of the Butte district, Montana. Single grains of andesine plagioclase showing varying...