Results 21 to 30 of about 53,501 (300)

Hydrothermal Alteration of Glass to Chrysotile [PDF]

Journal of the American Ceramic Society, 2012
Chrysotile fibers were synthesized from glass in hydrothermal conditions. The starting materials were first held at 1650°C and then rapidly quenched down to room temperature. The resulting glass, after the addition of mineralizing agents, was hydrothermically altered in the following conditions: temperature 300 °
BLOISE, Andrea, Belluso E, Catalano M, Barrese E, MIRIELLO, DOMENICO, APOLLARO, Carmine   +5 more
openaire   +3 more sources

Applying spectral analysis for identification of alteration zones in north Saveh area, Iran

Journal of Spectral Imaging, 2020
An extensive series of volcanic rocks are exposed in the north of Saveh city, Iran, which consist of phyllic, argillic and propylitic hydrothermal alteration types. For the purpose of the investigation, a FieldSpec3® spectroradiometer was used to measure
Kazem Rangzan, Somayeh Beyranvand, Hoshang Pourkaseb, Hojjatollah Ranjbar, Alireza Zarasvandi   +4 more
doaj   +1 more source

Nitrate-Dependent Iron Oxidation: A Potential Mars Metabolism [PDF]

, 2018
This work considers the hypothetical viability of microbial nitrate-dependent Fe2+ oxidation (NDFO) for supporting simple life in the context of the early Mars environment.
Abramov, Amils, Anand, Arevalo, Arnold, Arvidson, Bauermeister, Benz, Bibring, Bridges, Bridges, Bruce, Busigny, Byrne-Bailey, Cabrol, Canfield, Carlson, Carlson, Carr, Chakraborty, Chakraborty, Changela, Charlou, Chassefière, Chastain, Chaudhuri, Chevrier, Cockell, Cockell, Cockell, Comeau, Czaja, Dartnell, Edwards, Edwards, Edwards, Ehlmann, Ehlmann, Ehlmann, Ehrenreich, Emerson, Emerson, Emerson, Etique, Ettwig, Fassett, Filiberto, Fisk, Formisano, Fowler, Fox, Fox, Fox-Powell, Frydenvang, Gauger, Gendrin, Glavin, Grady, Gronstal, Grotzinger, Grotzinger, Hafenbradl, Hecht, Hedrich, Hicks, Hoefen, Hoehler, Hoppert, Hurowitz, Ilbert, Ionescu, Irwin, Jakosky, Jepsen, Johnson, Kappler, Kappler, Kappler, King, Kish, Klueglein, Klueglein, Konhauser, Konn, Kounaves, Kumaraswamy, Lack, Lalonde, Lanza, Laufer, Lopez-Reyes, Lovley, Lovley, Madigan, Mahaffy, Malin, Mangold, Manning, Martin, Martín-Torres, Marzo, McSween, McSween, Michalski, Millero, Ming, Ming, Miot, Miot, Miot, Miot, Miot, Miot, Miot, Miot, Mirvaux, Montoya, Morgan, Morris, Morris, Morris, Muehe, Myers, Nachon, Navarro-González, Nealson, Nie, Nixon, Nixon, Nixon, Oren, Osinski, Palucis, Pantke, Parnell, Pirajno, Popa, Raghoebarsing, Raiswell, Ramirez, Rampe, Rampe, Reimers, Revsbech, Roden, Santelli, Schieber, Schuerger, Schwenzer, Schwenzer, Schädler, Sephton, Sholes, Smith, Smith, Squyres, Squyres, Squyres, Steele, Stern, Stern, Stevens, Straub, Straub, Straub, Strohm, Summers, Summers, Summers, Sutter, Toporski, Tosca, Tosca, Tuff, Vaniman, Visscher, Wacey, Weber, Weber, Weber, Webster, Welhan, Wheat, Williams, Yen, Yen   +185 more
core   +8 more sources

When do we need pan-global freeze to explain ^(18)O-depleted zircons and rocks? [PDF]

, 2011
Rocks with δ^(18)O values of less than 5‰ SMOW (Standard Mean Ocean Water) contain oxygen derived from ∼0‰ seawater or meteoric (rain or melted snow,
Bindeman, Ilya
core   +1 more source

Spectral Responses of As and Pb Contamination in Tailings of a Hydrothermal Ore Deposit: A Case Study of Samgwang Mine, South Korea

Remote Sensing, 2018
We analyzed chemical composition, mineralogy, and spectral characteristics of the tailings of a hydrothermal gold mine in South Korea. We measured spectral responses of tailings to arsenic (As) and lead (Pb) concentration and developed and validated a ...
Yongsik Jeong, Jaehyung Yu, Lei Wang, Ji Hye Shin   +3 more
doaj   +1 more source

Surface alteration of pollucite under hydrothermal conditions. [PDF]

Journal of Nuclear Science and Technology, 1990
In connection with studies for evaluating the leachability of Cs from solidified radio-active waste, the surface alteration of pollucite was studied under hydrothermal conditions. Pollucite exposed to NaCl or KCl at 300°C formed on its surface a precipitate phase of analcime in the case of NaCl or leucite in the case of KCl.
Hitoshi MIMURA, Masahiro SHIBATA, Kenichi AKIBA   +2 more
openaire   +1 more source

Fertilizing Properties of Potassium Feldspar Altered Hydrothermally [PDF]

Communications in Soil Science and Plant Analysis, 2019
The material obtained through hydrothermal alteration of K-feldspar rock in alkaline conditions is a potential source of soluble potassium (K), but agronomic testing is needed to verify its capacity to supply K to crops. A (NH4)2SO4-based bioassay was used to test the capacity of the material to supply K to tomato plants (Lycopersicon esculentum Mill.)
Davide Ciceri, Thomas C. Close, Allen V. Barker, Antoine Allanore   +3 more
openaire   +3 more sources

Cap rock efficiency of geothermal systems in fold-and-thrust belts: Evidence from paleo-thermal and structural analyses in Rosario de La Frontera geothermal area (NW Argentina) [PDF]

, 2016
Cap rock characterization of geothermal systems is often neglected despite fracturing may reduce its efficiency and favours fluid migration. We investigated the siliciclastic cap rock of Rosario de La Frontera geothermal system (NW Argentina) in order to
Aldega, L., Bigi, S., Chiodi, Agostina Laura, Corrado, Sveva, Di Paolo, L., Giordano, G., Invernizzi, C., Maffucci, R.   +7 more
core   +2 more sources

The Alteration and Mineralization Characteristics of Miocene Porphyry Cu-Au Deposits of Chagai Magmatic Belt, District Chagai, Balochistan, Pakistan

International Journal of Economic and Environment Geology, 2021
Subduction related Miocene porphyry type deposits are found in the east-west trending Chagai magmatic belt (CMB) in Pakistan's western margin, Balochistan.
Fida Murad, Abdul Ghaffar, Innayat Ullah, Abdul Shakoor Mastoi, Muhammad Tariq Zaman
doaj   +1 more source

Enrichment in critical metals (In-Ge) and Te-Se in epithermal deposits of the 'La Carolina' district, San Luis, Argentina [PDF]

, 2018
This study was supported by the ‘Proyecto de Ciencia y Técnica P-3-2-0414, of the National University of San Luis’ and by the Project CGL2016-76532-R from the MINECO of ...
Cepedal Hernández, María Antonia, Fuertes Fuente, María Mercedes, Gallard Esquivel, M. C., Martín Izard, Agustín   +3 more
core   +2 more sources