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The permeability and elastic moduli of tuff from Campi Flegrei, Italy: implications for ground deformation modelling
permeability and elastic moduli tuff from Campi Flegrei Italy ground deformation modelling
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2015/1/6
The accuracy of ground deformation modelling at active volcanoes is a principal requirement in volcanic hazard mitigation. However, the reliability of such models relies on the accuracy of the rock ph...
EFFECT OF N, P, K CONCENTRATIONS ON YIELD AND FRUIT QUALITY OF TOMATO (Solanum lycopersicum L.) IN TUFF CULTURE
Tomato tuff open soilless macronutrients
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2010/12/9
This study concluded that high concentration of N, P and K in the nutrient solution gave higher total yield and tomato fruit weight than the control nutrient solution in tuff culture grown tomato. Hig...
Studies On Mushroom Production In Aquaculture With Tuff and Perlite
Mushroom Production Aquaculture With Tuff and Perlite
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2009/1/16
In this study perlite, volcanic tuff and peat moss media were investigated for their possible use in mushroom production in aquaculture between 1994-1995. In mushroom feeding studies, 2% sucrose mediu...
JORDANIAN ZEOLITIC TUFF AS A RAW MATERIAL FOR THE PREPARATION OF SUBSTRATES USED FOR PLANT GROWTH
zeolite substrate vegetable seedlings macro elements
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2010/12/1
One of the problems faced in front of industry for potting media is limited amount of quality row materials (mainly peat) for unlimited production of quality substrates in the future. The using of nat...
Electron Microscopy Study of Volcanic Tuff Alteration to Illite-Smectite under Hydrothermal Conditions
Hydrothermal Alteration Illite-Smectite SEM-EDS TEM-AEM Volcanic Tuff
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2011/12/6
Abstract: Experimental alteration of volcanic tuff from Almer韆, southeastern Spain, was performed in solutions with different Na/K ratios (0.01, 1, 10, and 100), different total salt concentrations (0...
Experimental Alteration of Volcanic Tuff: Smectite Formation and Effect on 18O Isotope Composition
Alteration Mechanism of Volcanic Tuff Oxygen Isotope Exchange Smectite Tuff
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2011/12/8
Abstract: Three samples of volcanic tuff were hydrothermally altered at ∼82°C in a soxhlet apparatus for periods from 745 to 2706 h. The samples correspond to partially altered specimens of volc...
Dioctahedral Tosudite in Hydrothermally Altered Pliocene Rhyolitic Tuff, Neutla, Mexico
Chlorite-smectite clay Clays Ditosudite Mexico Mixed-layer clay Tosudite
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2011/12/28
Dioctahedral tosudite, a regular interstratification of dioctahedral chlorite-dioctahedral smectite, occurs associated with kaolin in the hydrothermal area of Delgado, Neutla, Mexico. Its composition ...
Paleogeothermal and Paleohydrologic Conditions in Silicic Tuff from Yucca Mountain, Nevada
Geothermal gradients Illite/smectite K/Ar dating X-ray powder diffraction Yucca Mountain
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2011/12/29
The clay mineralogy of tuffs from Yucca Mountain, Nevada, the potential site of the nation's first high-level radioactive waste repository, has been studied in order to understand the alteration histo...
Saponite and Vermiculite in Amygdales of the Granby Basaltic Tuff, Connecticut Valley
Amygdales Basalt Fe-rich smectite Saponite Saponite-vermiculite intermediate Smectite Vermiculite
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2011/11/30
Abstract: Clay of apparent hydrothermal origin that fills amygdales in the Granby Basaltic Tuff (Lower Jurassic) of the Connecticut Valley was analyzed and found to consist of two exceptionally well-c...
Paramagnetic Defect Centers in Hydrothermal Kaolinite from an Altered Tuff in the Nopal Uranium Deposit, Chihuahua, Mexico
Defect centers Electron paramagnetic resonance Hydrothermal Kaolinite Natural radiation
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2012/1/5
Point defect centers in hydrothermal kaolinite have been investigated using electron paramagnetic resonance (EPR). Kaolinite was sampled in petrographically well-defined materials coming from uranium-...
Goyazite in Kaolinitic Altered Tuff Beds of Cretaceous Age Near Denver, Colorado
Diagenesis Goyazite Kaolinite Phosphorus Volcanic ash
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2012/2/7
A hydrated alumino-phosphate mineral was identified in thin, kaolinitic clay beds of the Cretaceous Dakota Group and the overlying Mowry Shale in the Dakota hogback west of Denver, Colorado. It occurs...
Zeolite Mineral Reactions in a Tuff in the Laney Member of the Green River Formation, Wyoming
Analcime Clinoptilolite Diagenesis Green River Formation Heulandite Volcanic ash Zeolites
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2012/2/8
Two diagenetic stages of zeolitic alteration were recognized in a study of a thin bed of rhyolitic ash that was deposited in Eocene Lake Gosiute (Laney Member of the Green River Formation). The ash be...