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Crystal Chemical Differences in Al-Rich Smectites as Shown by Multivariate Analysis of Variance and Discriminant Analysis
Aluminum smectite Beidellite Chemical composition Classification Crystal chemistry Discriminant analysis Multivariate analysis
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2012/2/2
Multivariate analysis of variance and discriminant analysis were used to establish the crystal chemistry of several Al-rich smectites. The statistical analyses were carded out on 78 samples taken from...
Mineralogy, O18/O16, and D/H Ratios of Clay-Rich Sediments from Deep Sea Drilling Project Site 180, Aleutian Trench
Deep sea sediments D/H Isotopic ratios O18/O16 Provenance
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2012/2/8
Mineralogy, O18/O16, and D/H ratios have been determined in five size fractions (<0.1, 0.1?.5, 0.5?.0, 1.0?.0, and >2.0祄) of seven samples taken from 500 m of Pleistocene deep-sea sediments cored at D...
Origin of Iron-Rich Montmorillonite from the Manganese Nodule Belt of the North Equatorial Pacific
Authigenic Formation Deep-Sea Clay Manganese Nodule Belt Montmorillonite Pacific Sediments Smectite
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2012/2/9
Clay minerals in the upper 50 cm of sediment that surround the Cu- and Ni-rich manganese nodules in the North Equatorial Pacific form two fractions: terrigenous (mostly eolian) illite, chlorite, and k...
Hisingerite Occurring as a Weathering Product of Iron-Rich Saponite
Hisingerite Occurring Iron-Rich Saponite
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2012/2/14
Hisingerite occurs as a weathering product of iron-rich saponite in rhyolitic tuff of Oya, Tochigi Prefecture. The chemical composition: SiO2, 40·68%; Al2O3, 4·44%; Fe2O3, 28·54%; MgO, 1·85%; CaO, 1·4...
Iron-Rich Saponite (Ferrous and Ferric Forms)
Iron-Rich Saponite Ferrous Ferric Forms
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2012/2/15
Clayey fragments colored deep bluish-green are widely found in glassy rhyolitic tuffs at Oya, Tochigi Prefecture. In room-air the color changes to black or gray within one hour and finally to brown in...
A Sepiolite-Rich Playa Deposit in Southern Nevada
Sepiolite-Rich Playa Deposit Southern Nevada
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2012/2/17
Sepiolite is seldom reported in playa deposits, even though it is generally believed to form in a highly saline, alkaline environment. Its rareness suggests that unusual conditions are necessary for f...