Ralph E. Grim and Necip Güven (Eds.)'s Bentonites: Geology, Mineralogy, Properties and Uses PDF

By Ralph E. Grim and Necip Güven (Eds.)

ISBN-10: 008086936X

ISBN-13: 9780080869360

ISBN-10: 0444416137

ISBN-13: 9780444416131

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Extra info for Bentonites: Geology, Mineralogy, Properties and Uses

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It is of interest that the magnesium content of the smectite is higher than that of the probable parent ash. Fragments of unaltered ash, grains of feldspar, quartz, and biotite commonly make up less than 10% of the bentonite. The cristobalite is not restricted t o particular horizons and is not always present in a given bed. The smectite in the producing horizon commonly makes up about 90%of the material. Of the many bentonite beds in the area about seven are sufficiently thick, continuous, and rich enough in smectite t o be of commercial interest.

M. and Reynolds, R E . , 1966. Umiat bentonite. An unusual montmorillonite from Umiat, Alaska. Am. , 51: 1443-1456. , 1935. A preliminary investigation of the bleaching clays of Mississippi. Miss. Geol. Surv. , 29: 6 0 pp. , 1969. Bentonite in Montana. , Bur. Mines. , 74: 3 4 pp. , 1929. Occurrence of bentonite in Southern Arkansas. Am. Inst. Min. Metall. , Tech. , 239: 11 pp. , 1960. Geology of the Otay bentonite deposit, San Diego County, California. Calif. Dep. Nat. , Div. Mines, Spec. , 64: 1-16.

The S-type montmorillonite lamellae are occasionally found in both samples from Manitoba. In the “Pembina mountain clay”, sample 41, smectites consist mostly of Cheto-type mossy aggregates. A large number of micas, in the form of subhedral and euhedral crystallites are observed in the clay fraction of this sample. Colom b ia Bentonite deposits are reported in the vicinity of Marquita, Fresno, and Falan in the Tolima area by Varon (1960). They occur in the Honda formation of Tertiary age. Cuba Bentonitic clays composed of 90-95% montmorillonite overlying Cretaceous limestone were encountered in several bore holes near Rodas in the Province of Las Villas (Cech and Martiny, 1963).

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Bentonites: Geology, Mineralogy, Properties and Uses by Ralph E. Grim and Necip Güven (Eds.)

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