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Origin of an Underclay as Revealed by Vertical Variations in Mineralogy and Chemistry
Acid leaching Coal Expandability Illite/smectite Mixed layer Underclay
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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
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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...
Mossbauer Studies of Palygorskite and Some Aspects of Palygorskite Mineralogy
Infrared spectroscopy Iron Mossbauer spectroscopy Palygorskite Sepiolite Thermal treatment X-ray powder diffraction
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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
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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
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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
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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
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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
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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...
Mineralogy and Genesis of the Wealdian Sediments in the Southern Cordillera Iberica (Spain)
Mineralogy Genesis Wealdian Sediments Southern Cordillera Iberica
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2012/2/14
The present paper presents the mineralogical composition of sediments from the Spanish Wealdian facies, selected from four stratigraphic sections of several regions in the Southern Cordillera Iberica....
The Mineralogy of Glauconite
Mineralogy Glauconite
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2012/2/14
The mineral in monomineralic glauconite pellets is an iron-rich mixed-layer illite-smectite (here called glauconite), often composed almost entirely of illite layers. The nature of the interlayering i...
Origin and Mineralogy Glacial and Interglacial Clays of Southern Norway
Origin Mineralogy Glacial Interglacial Clays Southern Norway
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2012/2/13
The Numedal River basin (6000 km2) in central and east Norway contains 3 × 109 m3 of clayey material, corresponding to a clay loam sediment, which contains 2 million tons of absorbed rare earth elemen...
Mineralogy and Origin of the Coalinga Asbestos Deposit
Mineralogy Origin the Coalinga Asbestos Deposit
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2012/2/13
Since 1960 asbestos production of the United States has more than tripled, a phenomenon due in large part to the development of the Coalinga asbestos deposit in western California. Although most asbes...
Mineralogy and Cation Exchange Properties of Libby Vermiculite Separates as Affected by Particle-Size Reduction
Mineralogy Cation Exchange Properties Libby Vermiculite Particle-Size Reduction
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2012/2/15
A vermiculite (Libby, Montana) sample obtained from the Zonolite company contained mostly coarse-grained separates with only 8? per cent clay. The 2?0 祄 fraction was used for particle-size reduction s...
Mineralogy of Palagonitic Material from the Golan Heights, Israel
Mineralogy Palagonitic Material Golan Heights
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2012/2/15
Sideromelane in Pleistocene lapilli-tuff rocks from the Golan Heights had partly altered into palagonite. X-ray and electron diffraction showed that the major part of the clay alteration product is co...
Clay Mineralogy of Some Silty Soils of the Inner Coastal Plains of Mississippi
Clay Mineralogy Silty Soils the Inner Coastal Plains Mississippi
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2012/2/15
The chemical and mineralogical properties of six soils previously believed to be developed from coastal plain sediments were found to be significantly influenced by thin loess overlays and admixtures....