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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
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. % ...
Solid-state 29Si MAS NMR studies of illite and illite-smectite from shale
Solid-state 29Si MAS NMR studies illite illite-smectite shale
2012/4/1
A new method to extract quantitative information from poorly resolved Si magic-angle spinning
(MAS) nuclear magnetic resonance (NMR) spectra of natural mixed-layer illite-smectite (I-S) clays29Si
i...
Frio Shale Mineralogy and the Stoichiometry of the Smectite-to-Illite Reaction: The Most Important Reaction in Clastic Sedimentary Diagenesis
Diagenesis Illite-Smectite Mass Balance Mineralogy Shale
2011/12/22
Abstract: Burial diagenesis of shales of the Frio Formation resulted in an increase in the abundance of mixed-layer illite-smectite (I-S), albite and chlorite, and a decrease in the abundance of K-fel...
Geologic Control of Severe Expansive Clay Damage to a Subdivision in the Pierre Shale, Southwest Denver Metropolitan Area, Colorado
Bentonites Expansive clays Pierre Shale Smectites
2011/12/27
Abstract: Shortly after construction of a subdivision in the southwest Denver metropolitan area in 1986, a portion of the subdivision built directly on steeply-dipping strata of the Pierre Shale began...
Low Temperature Experimental Investigation of the Effect of High pH KOH Solutions on the Opalinus Shale, Switzerland
Experimental investigation High pH K-rectorite K-feldspar Opalinus shale Phillipsite
2011/12/29
Batch reactor experiments were performed at 150°C, 175°C and 200°C to determine the effect of high pH KOH solutions on the mineralogy of the Opalinus shale. In these experiments, the change in solutio...
Shale Diagenesis: A Case Study from the Albian Harmon Member (Peace River Formation), Western Canada
Clay mineralogy Quantitative shale mineralogy Silicate diagenesis
2011/12/31
Shales have often been cited as the source of authigenic material that occurs in coarser grained sediments, but there are few comprehensive studies of diagenesis in shales that rigorously attempt to d...
Low Temperature Experimental Investigation of the Effect of High pH NaOH Solutions on the Opalinus Shale, Switzerland
Analcime Experimental investigation High pH Na-rectorite Opalinus shale Vermiculite
2011/12/31
Batch reactor experiments were performed at 150°C, 175°C, and 200°C to determine the effect of high pH NaOH solutions on the mineralogy of the Opalinus shale. In these experiments, the change in solut...
Characterization of Hydrothermal Tobelitic Veins from Black Shale, Oquirrh Mountains, Utah
Ammonium illite Hydrothermal Microprobe Nitrogen analysis Tobelite
2011/12/31
Hydrothermal tobelitic phyllosilicates modeled as ISII (R3) ordering with a minimum of 2–3% and a maximum of 6–8% interstratified smectite occur in veins and as replacement of fossils in hydrothermall...
Porosimetry Measurement of Shale Fabric and its Relationship to Illite/Smectite Diagenesis
Illite/Smectite Shale fabric Mercury porosimetry
2011/12/31
The extent of illite/smectite (I/S) reactions is linked with quantitative measurements of shale fabric in a suite of samples from a lower Frio Formation well. Greater illitization of the I/S clays is ...
Petrology of the Desmoinesian Excello Black Shale of the Midcontinent Region of the United States
Black shale Illite/smectite Kaolinite Nodules Organic carbon Petrology Phosphate
2012/1/11
The Excello Shale is one of the best exposed and most laterally continuous of the Pennsylvanian cyclothemic black shales in the midcontinent region of the United States. Its petrology and paleoenviron...
K/Ar Systematics of Bentonite and Shale in a Contact Metamorphic Zone, Cerrillos, New Mexico
Age dating Bentonite Contact metamorphism Illite Illite/smectite K/Ar ages
2012/1/12
To test the ability of illitic clay minerals to retain argon, K/Ar ages were measured on grain-size separates from the Cretaceous Mancos Shale and associated bentonites that have been transformed into...
Swelling Pressure Calculated from Mineralogical Properties of a Jurassic Opalinum Shale, Switzerland
Gouy double layer theory Mineralogical composition Shale Soil mechanics Surface area Surface charge Swelling pressure
2012/2/2
Nineteen drill core samples of lower Dogger opalinum shale from wells drilled in connection with a tunnel project near Brugg, northern Switzerland, were investigated. The shale is a well known swellin...
Clays, Cations, and Geophysical Log Response of Gas-Producing and Nonproducing Zones in the Gammon Shale (Cretaceous), Southwestern North Dakota
Exchange cations Geophysical log Mixed layer Natural gas Shale Statistical analysis
2012/2/6
The Upper Cretaceous Gammon Shale has served as both source bed and reservoir rock for accumulations of natural gas. Gas-producing and nonproducing zones in the Gammon Shale are differentiated on the ...
Burial and Contact Metamorphism in the Mancos Shale
Bentonite Burial metamorphism Illite Interstratification Shale Smectite X-ray powder diffraction
2012/2/8
Clay samples from shales and bentonites in the Mancos Shale (Cretaceous) and its stratigraphic equivalents in the southern Rocky Mountain and Colorado Plateau have been analyzed by X-ray powder diffra...
Black Shale—Its Deposition and Diagenesis
Black shale Deposition Diagenesis Organic matter Syngenetic ores
2012/2/10
Black shale is a dark-colored mudrock containing organic matter that may have generated hydrocarbons in the subsurface or that may yield hydrocarbons by pyrolysis. Many black shale units are enriched ...