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ANOMALY DETECTION AND COMPARATIVE ANALYSIS OF HYDROTHERMAL ALTERATION MATERIALS TROUGH HYPERSPECTRAL MULTISENSOR DATA IN THE TURRIALBA VOLCANO
Spectral Anomaly Hydrothermal Alteration Hyperspectral Multispectral Multisensor
2014/4/29
The aim of this work is the comparative study of the presence of hydrothermal alteration materials in the Turrialba volcano (Costa Rica) in relation with computed spectral anomalies from multitemporal...
Characterization of Hydrothermal Alteration in Mount Berccha Area of Main Ethiopian Rift using Hyperspectral Data
Hyperspectral Imaging Spectrometry AISA Hawk LiDAR-DEM Wavelength Mapping
2011/11/11
Characterization of Hydrothermal Alteration in Mount Berccha Area of Main Ethiopian Rift using Hyperspectral Data.
Geology and Hydrothermal Alteration of the Aydın-Salavatlı Geothermal Field, Western Anatolia, Turkey
geothermal field hydrothermal alteration Büyük Menderes Graben Salavatlı western Anatolia Turkey
2009/7/8
The Aydın-Salavatlı geothermal field is located in the middle part of the Büyük Menderes Graben, and is characterized by normal-fault structures. The stratigraphic sequence of the Aydın...
Identification of Hydrothermal Alteration Zones for Exploration of Porphyry Copper Deposits Using ASTER Data
ASTER alteration mapping band ratio principal component analysis
2009/3/18
Alteration zones are important features for the exploration of porphyry copper deposits. The ASTER sensor is able to identify the types of alteration and its alteration zoning, which are important inf...
Genesis of Dioctahedral Phyllosilicates During Hydrothermal Alteration of Volcanic Rocks: II. The Broadlands-Ohaaki Hydrothermal System, New Zealand
Crystallization Dioctahedral Phyllosilicates Hydrothermal System Illite-Smectite (I-S) Polytypism Transmission Electron Microscopy
2011/12/2
Abstract: The clay mineral textures, assemblages, formation mechanisms, and controlling geological parameters relating to alteration of silicic volcanic rocks by hydrothermal solutions, in core sample...
Genesis of Dioctahedral Phyllosilicates During Hydrothermal Alteration of Volcanic Rocks: I. The Golden Cross Epithermal Ore Deposit, New Zealand
1M polytype Dioctahedral Clay Minerals Epithermal Hydrothermal Alteration Illite-Smectite (I-S) Neoformation Smectite Transmission Electron Microscopy (TEM)
2011/12/2
Abstract: To characterize the evolution of dioctahedral interstratified clay minerals in the Golden Cross epithermal deposit, New Zealand, hydrothermally altered volcanic rocks containing the sequence...
Reaction Mechanisms of Smectite Illitization Associated with Hydrothermal Alteration from Ponza Island, Italy
Atomic Force Microscopy Chemical Analysis Illite Polytype Smectite XRD
2011/12/6
Abstract: A hydrothermally altered rhyolitic hyaloclastite from Ponza island, Italy, has four alteration zones with unique clay assemblages: (1) a non-pervasive argillic zone characterized by smectite...
The Genesis of a Mordenite Deposit by Hydrothermal Alteration of Pyroclastics on Polyegos Island, Greece
Clinoptilolite Greece Heulandite Hydrothermal Alteration Mordenite Polyegos Pyroclastics Rhyolite Zeolites
2011/12/22
Abstract: The vitric component of the silicic pyroclastic flows and surge deposits (Prassa ignimbrite unit), from the northwestern exposures of the pyroclastics formation of Polyegos Island, South Aeg...
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...
Further Investigations of a Conversion Series of Dioctahedral Mica/Smectites in the Shinzan Hydrothermal Alteration Area, Northeast Japan
Burial diagenesis Interstratification K-fixation Mica Rectorite • Smectite
2012/2/7
A complete conversion series for mica/smectites was found in a hydrothermal alteration envelope around Kuroko-type ore deposits at the Shinzan area, Akita Prefecture, Northeast Japan. The minerals are...
Hydrothermal Alteration of a Serpentinite Near Takovo, Yugoslavia, to Chromium-Bearing Illite/Smectite, Kaolinite, Tosudite, and Halloysite
Cr-halloysite Cr-illite/smectite Cr-kaolinite Cr-tosudite Hydrothermal Serpentinite
2012/2/9
Hydrothermal alteration products of serpentinite near Takovo, Yugoslavia, were studied by X-ray powder diffraction and chemical analysis. A zone of mainly blue clays adjacent to the hydrothermal vein ...
Cristobalite Morphology and Oxygen Isotopic Composition Variation under Hydrothermal Alteration
Cristobalite Morphology Oxygen Isotopic Composition Variation Hydrothermal Alteration
2011/11/18
Abstract: From 2 to 28% opal-cristobalite was isolated from the 2–20 µm fraction of rhyolitic and andesitic tuffaceous pyroclastics from the Island of Honshu, Japan, where it had been formed in ...
Flint Clay by Hydrothermal Alteration of Sedimentary Rock in Mexico
Flint Clay Hydrothermal Alteration Sedimentary Rock Mexico
2012/2/20
This paper documents the first report of flint clay in Mexico, located at Estola, Guerrero, 199 km south of Mexico City, on Mexico Highway 95. It is the first report (known to the writers) of flint cl...
Hydrothermal Alteration of a Rhyolite Flow Breccia near San Luis Potosi, Mexico, to Refractory Kaolin
Hydrothermal Alteration Rhyolite Flow Breccia San Luis Potosi Refractory Kaolin
2012/2/21
A deposit of kaolin clay, the site of the General Zaragosa Mine, located about 50 km northwest of San Luis Potosi, S. L. P., Mexico, has produced more than 250,000 tons of refractory clay by room and ...