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Weathering of Iron-Bearing Minerals in Soils and Saprolite on the North Carolina Blue Ridge Front: II. Clay Mineralogy
Chlorite Goethite Hematite Iron Kaolinite Mossbauer spectroscopy Saprolite Soils Vermiculite Weathering
2011/11/30
Abstract: The mineralogy of the clay fraction was studied for soils and saprolite on two Blue Ridge Front mountain slopes. The clay fraction contained the weathering products of primary minerals in th...
Weathering of Basalt: Changes in Rock Chemistry and Mineralogy
Basalt Core-stone Element mobilization Goethite Halloysite Smectite Weathering
2012/1/10
The weathering of eastern Australian basalts, sampled from the rounded, hard, core-stone to the rind of softer weathered material, has been examined by bulk chemical analyses, thin section petrography...
Mossbauer Spectroscopic Study of the Iron Mineralogy of Post-Glacial Marine Clays
Hematite Iron Magnetite Mossbauer spectroscopy Quick clay Smectite Yield strength
2012/1/12
Three post-glacial marine clays from eastern Canada and one marine clay from Japan have been studied by M鰏sbauer spectroscopy to ascertain their iron mineralogy. Small amounts of hematite (in two samp...
Mineralogy from Geochemical Well Logging
Elemental analysis Illite Kaolinite Mineralogical analysis Multivariate analysis Neutron capture cross section Well logging
2012/1/11
Multivariate statistical analyses of geochemical, mineralogical, and cation-exchange capacity (CEC) data from a Venezuelan oil well were used to construct a model which relates elemental concentration...
Effect of Clay Mineralogy and Aluminum and Iron Oxides on the Hydraulic Conductivity of Clay-Sand Mixtures
Aluminum oxide Exchangeable sodium percentage Hydraulic conductivity Illite Iron oxide Montmorillonite Salinity Sand
2012/2/2
Changes in hydraulic conductivity and clay dispersivity of clay-sand mixtures (four reference smectites and Fithian illite) as a function of concentration (0.01 M Cl− and distilled water) and so...
Mineralogy, Crystallinity, O18/O16, and D/H of Georgia Kaolins
Crystallinity Hardness Isotope Kaolin Origin Oxygen isotopes
2012/1/13
Mineralogy, kaolin crystallinity, Fe content, 銸18, and 銬 were determined for late Cretaceous 搒oft?and early Tertiary 揾ard?Georgia kaolins. The crystallinity of the <0.5-, 0.5?.0-, and 1.0?.0- 祄 size f...
Mineralogy and Genetic Relationships of Tonstein, Bentonite, and Lignitic Strata in the Eocene Yegua Formation of East-Central Texas
Bentonite Clinoptilolite Kaolinite Lignite Smectite Tonstein Weathering
2012/2/6
A kaolinite-rich bed (tonstein) and an associated bentonite in the upper part of Yegua Formation at College Station, east-central Texas, were formed by in situ weathering processes in a late Eocene sw...
Origin of an Underclay as Revealed by Vertical Variations in Mineralogy and Chemistry
Acid leaching Coal Expandability Illite/smectite Mixed layer Underclay
2012/2/8
Regular vertical variations in mineralogy and chemistry indicate that underclay beneath the Herrin (No. 6) coal in southwestern Illinois has undergone in situ alteration. Alteration resulted from the ...
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
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...
Mossbauer Studies of Palygorskite and Some Aspects of Palygorskite Mineralogy
Infrared spectroscopy Iron Mossbauer spectroscopy Palygorskite Sepiolite Thermal treatment X-ray powder diffraction
2012/2/8
Fe3+ ions in palygorskite occupy sites at the edges and in the interior of the alumino-silicate chains. The M鰏sbauer parameters of the doublets associated with Fe3+ ions in edge sites indicate that th...
Geochemistry and Mineralogy of an Unusual Diabase Saprolite Near Columbia, South Carolina
Bulk density Diabase Kaolinite Oxidation Saprolite Smectite Weathering
2012/2/8
Empirical reaction progress diagrams showing the trends of major element oxide concentrations (in g/cm3) as functions of bulk density for a diabase saprolite reveal discontinuities in the trends of Al...
Mineralogy and Geology of the Maungaparerua Halloysite Deposit in New Zealand
Mineralogy Geology Maungaparerua Halloysite Deposit New Zealand
2011/11/18
Abstract: The Maungaparerua halloysite deposit is located on the North Island of New Zealand some 210 km north of Auckland. The halloysite deposit was formed by hydrothermal alteration of rhyolite flo...
Clay Mineralogy in Relation to Deltaic Sedimentation Patterns of Desmoinesian Cyclothems in Iowa-Missouri
Clay Mineralogy Desmoinesian Cyclothems Iowa-Missouri
2012/2/13
Almost four decades of study of Desmoinesian strata of Middle Pennsylvanian age in south-central Iowa and north-central Missouri have provided the stratigraphic control required to test the variation ...
Mineralogy of Al-Hasa Desert Soils (Saudi Arabia)
Mineralogy Al-Hasa Desert Soils Attapulgite illite X-ray mineralogical examination
2012/2/13
X-ray mineralogical examination of the 2?0 祄 fraction of oriented samples from a highly calcereous swamp soil and neighbouring Mio-Pliocene strata in A1-Hasa showed a wide range in mineralogy: attapul...
Microstructure, Mineralogy and Chemistry of Cambrian Glauconite Pellets and Glauconite, Central U.S.A.
Microstructure Mineralogy Cambrian Glauconite Pellets
2012/2/13
Glauconite pellets in the Cambrian of the central U.S.A. frequently contain two textural forms of glauconite–aggregate and oriented—which differ in both mineralogy and chemistry. The aggregate glaucon...