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The role of mineral surfaces in the preservation and transformation of organic carbon: meso- to nano– scale spatial complexity of organic matter forms in organic-rich shales
mineral surfaces preservation transformation organic carbon meso- to nano– scale spatial complexity organic matter forms organic-rich shales
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2012/3/30
Sequestration of organic matter (OM) in sediments is a fundamental biogeochemical process that regulates planetary temperature, the flux of free oxygen to the atmosphere and oceans, and the distributi...
Authigenic Illite and Organic Matter: The Principal Hosts of Vanadium in the Mecca Quarry Shale at Velpen, Indiana
Black Shale Illite Mecca Quarry Organic Matter Vanadium
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2011/12/6
Abstract: The Mecca Quarry Shale Member from Velpen, Indiana contains abundant vanadium which occurs in solid solution within illite-rich illite-smectite (I-S) having an average content of 1.65 wt. % ...
Goethite Dispersibility in Solutions of Variable Ionic Strength and Soluble Organic Matter Content
Citrate Dispersion Flocculation Goethite Humic Acid Light Scattering Salicylate Soluble Organic Matter
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2011/12/23
Abstract: The degree of flocculation of aqueous suspensions of microcrystalline goethite was measured in salts of monovalent, divalent and trivalent cations at pH 6.0?.5 over a range of ionic strength...
Adsorption of Water Vapor by Soils: Investigations of the Influence of Organic Matter, Iron, and Aluminum on Energetic Heterogeneity of Soil Clays
Soil constituents Surface heterogeneity Water adsorption
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2011/12/29
Water vapor adsorption isotherms were measured for samples of loessial soil clays modified by removing organic matter and Fe and Al compounds. The isotherms were analyzed by the exponential adsorption...
Comparison of I/S Transformation and Maturity of Organic Matter at Elevated Temperatures
Illite/smectite Kinetics Vitrinite maturity
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2011/12/29
Comparing the state of reaction advancement of I/S (illite content of illite/smectite mixed layer minerals) and organic matter (vitrinite reflectance) in instances of high temperature gradients allows...
Ammonium Substitution in Illite During Maturation of Organic Matter
Ammonium substitution ?Fixed-ammonium ?Hydrocarbon generation ?Illite/smectite transformation ?Organic maturation
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2012/1/4
Pierre shale samples from a thin stratigraphic zone within the contact aureole of the lamprophyric Walsen dike record changes due to thermal effects that are not influenced by detrital differences. An...
A Comparison of the Effectiveness of Eight Methods for the Removal of Organic Matter from Clay
Carbon disulfide Hydrogen peroxide Hypobromite Montmorillonite Organic
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2012/2/10
Organic matter present in clayey sediments may act as a cement between the clay particles as well as a blocking agent for the swelling of clay minerals like montmorillonite.Removal of the organic matt...
A Relationship between Crystallographic Properties of Illite and Chemical Properties of Extractable Organic Matter in Pre-Phanerozoic and Phanerozoic Sediments
Crystallographic Properties Illite Chemical Properties Extractable Organic Matter Pre-Phanerozoic Phanerozoic Sediments
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2012/2/13
Crystallographic properties of illite and chemical properties of organic matter in various mudstones ranging in age from Archean to Miocene were investigated. The breadth of the (001) X-ray powder dif...
Relation of Potassium Exchange and Fixation to Degree of Weathering and Organic Matter Content in Micaceous Clays of Podzol Soils
Potassium Exchange Degree Weathering Organic Matter Content Micaceous Clays
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2012/2/20
The rates of K exchange of untreated and peroxide-treated micaceous clays from five Podzol soils of increasing degrees of weathering were determined using sodium tetraphenyl boron. In addition, the am...