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Showing 1 to 15 of 15 for “"analcime"”.
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Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming
… and the Devils Tower and Barlow Canyon rocks as analcime phonolite.</p> <p>Associated alloclastic breccia with a crystal-charged volcanic glass matrix, surrounding depressions representing collapse of igneous material back into the vent, striking similarity to known volcante necks, and the …
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Petrologic studies of the Robles Formation, south central Puerto Rico
… of metamorphic alteration phases as follows: (1) analcime, celadonite, chlorite, sericite; (2) laumontite and albite; (3) prehnite; (4) pumpellyite; (5) epidote; (6) actinolite. Assemblages containing analcime, celadonite, and laumontite belong to the zeolite facies of metamorphism. Remaining …
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Fluid evolution in the nepheline syenites of the Ditrău Alkaline Massif, Transylvania, Romania
… secondary minerals as sodalite, cancrinite and analcime. Fluid inclusion studies in nepheline, aegirine, albite and cancrinite provide evidence for the role of highly saline fluids in incongruent transformation reactions by which sodalite, cancrinite and analcime crystallize mostly on the …
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Origin and Diagenesis of Lacustrine Sediments of the Late Oligocene Creede Formation, Southwestern Colorado
… pH of 7-9. The higher-grade mineral assemblage (analcime, K-feldspar, quartz, interstratified illite/smectite and chlorite/smectite in CCM-1) is due to hotter fluids migrating through the more permeable strata. Alteration occurred in a relatively closed system. On the basis of studies of zeolite …
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Production of silver-loaded zeolites and investigation of their antimicrobial activity
… high-alumina Phillipsite. Silver-doped Analcime was produced by isomorphous substitution of silver ions into the Analcime framework. The silver-loaded zeolites were characterized by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), energy dispersive X-ray (EDX) …
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An integrated geochemical and sedimentological analysis of a lacustrine Lagerstätten in the Triassic Cow Branch Formation of the Dan River Basin
… The replacement of silica by the zeolite mineral analcime, coupled with primary dolomite precipitation suggests alkaline lake water. Geochemical evidence, including total organic carbon (TOC), pyrite sulfur and iron speciation data suggest anoxic, ferruginous waters. At the lagerstätte interval, …
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Geology of igneous extrusive and intrusive rocks in the Sundance area, Crook County, Wyoming
… during the same intrusive event, Primary analcime is the only feldspathoid present in the foyaite.</p> <p>The quartz latite is interpreted as being the youngest of the two rock types, A maximum age for the quartz latite is Paleocene, based on the presumed age of plagiofoyaite(?) clasts …
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High throughput optical materials
… conditions were optimised for the formation of analcime, sodalite, zeolite A and faujasite. All materials were characterised using powder x-ray diffraction.<br/>The thermal conversion of zeolite A and sodium chloride into sodalite has been studied using combined TGA and DTA analysis and time …
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Facies, stratigraphy, and mineralogy of the carbonate marker and D marker units, lower Green River Formation, Uinta Basin, Utah
… anoxic to dysoxic. As a result, precipitation of analcime cement, ferroan dolomite, and the severe alteration or dissolution of clay species is common in the sublittoral and profundal zones.
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Petrology of the Cenozoic phonolites and related rocks of the Houston Creek area, Bear Lodge Mountains, Wyoming
… sodalite, orthoclase, sphene, and melanite, with analcime, natrolite, calcite, and clays(?) occurring as major alteration products. Field relationships indicate that phonolite and trachyte porphyry were emplaced as sills within the Minnelusa Formation and phonolite porphyry was emplaced as a sill …
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The Provenance of Eocene Tuff Beds in the Fossil Butte Member of the Green River Formation of Wyoming: Relation to the Absaroka and Challis Volcanic Fields
… been altered to illite, calcite, clinoptilolite, analcime, albite, and K-feldspar. The variable alteration of the tuff beds confirms previous studies of Fossil Lake's salinity fluctuation through time. One outcrop (FB-10), which was previously interpreted to represent the K-spar tuff, has biotite …
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A structure-reactivity study of selected phosphorus compounds
… the hydrated and dehydrated forms of synthetic analcime indicate that the structures are essentially identical to structure of the natural form determined previously.
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Authigenic analcite in the Golden Valley Formation southwestern North Dakota
<p>Authigenic analcite constitutes up to about 60 percent of a massive, arksosic sandstone exposed on major buttes in the North Dakota Badlands. The analcite constitutes up to about 80 percent of a thin analcimolite bed at the top of the arkose unit. The analcite occurs as spherulites in the …
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Synthesis of zeolites from geological materials and industrial wastes for potential application in environmental problems
… zeolite Na-P1 (GIS), JBW-type zeolite (JBW), analcime (ANA), whereas the activation of KAO in KOH solutions produced chabazite (CHA), zeolite Barrer-KF, phillipsite (PHI) and K-feldspar. The hydrothermal conversion of kaolinite in fluoride media did not produce successful results, although …
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Lithium at the Thacker Pass deposit, Humboldt County, Nevada, U.S.A.
… rock. Other minerals observed in the deposit are analcime in the LGZ, K-feldspar in the HGZ, and secondary or detrital quartz throughout. HGZ euhedral pyrite was found to contain As and Mo and occurred as disseminations, veinlets, and bedding-parallel bands within individual lacustrine? units. …