搜索结果: 16-30 共查到“凹凸棒石 Alteration”相关记录63条 . 查询时间(0.076 秒)
Illite-Smectite Alteration and Accompanying Reactions in a Pennsylvanian Underclay Studied by TEM
Coal Basin Diagenesis HRTEM Illite/Smectite Paleosol Underclay Weathering
2011/12/22
Abstract: Pennsylvanian underclay from Illinois is characterized by well-developed mineral zonation: towards the coal bed, marly limestone gradually evolves into carbonate-free clay, chlorite becomes ...
Alteration of Silicic Vitric Tuffs Interbedded in Volcaniclastic Deposits of the Southern Basin and Range Province, Mexico: Evidences for Hydrothermal Reactions
Basin and Range Hydrothermal alteration Mass-balance calculations Mexico Smectites Transmission electron microscopy Volcanic tuffs Zeolites
2011/12/1
Abstract: In Northwestern Mexico, the Miocene basins that disrupted the Sierra Madre Occidental Province are filled with sandstones and conglomerates (the Báucarit Formation) cemented mainly by zeolit...
Geochemical alteration of pyrochlore group minerals: Betafite subgroup
pyrochlore group minerals Betafite subgroup
2012/4/6
Relatively low-temperature, secondary alteration is common in samples of metamict betafite and initially proceeds bythe substitution mechanisms ANaYF--+ADYD,ACaYO--+ADYD,and ACaXO--+ADXD.Alteration is...
Change in Layer Charge of Smectites and Smectite Layers in Illite/Smectite during Diagenetic Alteration
Beidellitization Charge Location Diagenesis Greene-Kelly Test Illite/Smectite Layer Charge Smectite
2011/12/27
Abstract: The changes in amount and location of layer charge during diagenetic alteration have been investigated for smectites and smectite layers of illite/smectite interstratified minerals (I/S) by ...
Formation of Mica During Experimental Alteration of K-Feldspar
Dissolution mechanism Experimental alteration Fibrous boehmite K-feldspar Mica
2011/12/28
Experimental alterations of K-feldspar in distilled-deionized water at 150°, 175°, 200°, and 225°C were performed. The alteration products and dissolution mechanism of K-feldspar were examined by X-ra...
Alteration of Smectite in a System Including Alanine at High Pressure and Temperature
Alanine Albite Ammonium-analcime Ammonium-mica Ammonium-montmorillonite Diagenesis High pressure X-ray diffraction
2011/12/27
Transformation of montmorillonite was experimentally investigated using a model system of montmorillonite-alanine at 100 MPa and up to 500°C. Sodium-montmorillonite changed to a mixed layer mineral of...
Growth of Smectite from Leached Layer During Experimental Alteration of Albite
Albite Amorphous leached layer Flaky smectite Noncrystalline fiber Transmission electron microscopy
2011/12/1
Abstract: Experimental alteration of albite in deionized-distilled water at 150° to 225°C for various times up to 30 days was performed to elucidate formation processes for alteration products of albi...
Alteration of Ilmenite in the Manavalakurichi Deposit, India
Alteration Ilmenite Pseudorutile Unit cell volume
2011/12/29
Magnetic fractionation, chemical, and structural analyses prove that alteration of ilmenite from Manavalakurichi deposit extends only up to the formation of pseudorutile with traces of rutile. The dat...
Formation of Hydrotalcite-like Compounds During R7T7 Nuclear Waste Glass and Basaltic Glass Alteration
Basaltic glass Experimental alteration Hydrotalcite-like compounds MgCl2-CaCl2 salt solution R7T7 nuclear waste glass Saponite
2011/12/29
Alteration experiments have been performed using RTT7 and synthetic basaltic glasses in MgCl2-CaCl2 salt solution at 190∑C. The duration of experiments ranged from 0.25 to 463 days. The alteration pro...
Formation of Clay Minerals During Low Temperature Experimental Alteration of Obsidian
Allophane Dealkalized leached layer Fibrous material Nonstoichiometric dissolution Obsidian Smectite
2011/12/30
Experimental alteration of obsidian in distilled-deionized water at 150? 175? 200? and 225癈 was studied. The alteration products were examined by X-ray powder diffraction, scanning electron microscopy...
AN EXAMPLE TO SEPIOLITE FORMATION IN VOLCANIC BELTS BY HYDROTHERMAL ALTERATION: KIBRISCIK (BOLU) SEPIOLITE OCCURRENCE
Geological mineralogical sepiolite occurrence
2011/11/8
Geological, mineralogical and chemical properties of a sepiolite occurrence, located in the south of K齜r齭c齥 township of Bolu Province, northcentral Turkey, have been investigated in detail, and new mi...
Formation of Allophane and Beidellite During Hydrothermal Alteration of Volcanic Glass Below 200°C
Allophane Amorphous aluminum-silicate coating Experimental alteration Smectite Transitional material Volcanic glass
2011/12/31
Experimental alteration of volcanic glass has been carried out in distilled water at 200°C and 150°C. The formation and transformation processes of alteration products have been examined by scanning e...
Mineralogy and Genesis of Clays in Postmagmatic Alteration Zones, Makurazaki Volcanic Area, Kagoshima Prefecture, Japan
Makurazaki volcanic area Alteration aureoles Mode of occurrence Mineralogical properties Sudoite Tosudite Rectorite
2012/1/4
Two distinct zonal sequences of clay minerals (H- and L-type) were found around silicified rocks in the Makurazaki volcanic area, Kagoshima Prefecture, Japan. The clay mineral sequences from the inner...
Clay Mineralogy, Alteration History, and Economic Geology of the Whitemud Formation, Southern Saskatchewan, Canada
Abrasion Brightness Eastend Formation Frenchman Formation Kaolin Kaolinite Paleosol Whitemud Formation
2012/1/4
The Upper Cretaceous (Maastrichtian) Whitemud Formation is a potentially commercial kaolin deposit located in southern Saskatchewan and southeastern Alberta. The Whitemud Formation contains a lower ka...
Mica Alteration Reactions in Jurassic Reservoir Sandstones from the Haltenbanken Area, Offshore Norway
Alteration Burial diagenesis Chlorite Illite Kaolinite Mica Sandstone
2012/1/5
Petrographic observations indicate that dolomite, siderite, pyrite, Ti oxides, quartz, and K-feldspar formed as by-products of mica alteration during diagenesis of Jurassic reservoir sandstones of the...