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Smectites in Iron-Rich Calcareous Soil and Black Soils of Taiwan
Black Soils Iron-Rich Calcareous Soil Mollisols Smectite Vermiculite Vertisols
2011/12/7
Abstract: The iron-rich calcareous soil (Typic Rhodustalf) from the Penghu island group represents a volcanic area. The black soils (Typic Haplustert, Vertic Endoaquoll, Typic Hapludolls) are typical ...
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
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
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...
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...