搜索结果: 1-15 共查到“矿床学与矿相学 Alteration”相关记录63条 . 查询时间(0.08 秒)
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.
Facies-related diagenetic alteration in lacustrine–deltaic red beds of the Paleogene Ergeliin Zoo Formation (Erdene Sum area, S. Gobi, Mongolia)
Lacustrine–deltaic Carbonate Phyllosilicates Diagenesis Paleogene Mongolia
2011/11/14
The Late Eocene Ergeliin Zoo Formation, Mongolia, was subdivided into four facies associations/stratigraphic units which
are characterized by various carbonate minerals: (I) mud–sand flat (low-Fe dol...
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...
Multiple Episodes of Clay Alteration at the Precambrian/Paleozoic Unconformity, Appalachian Basin: Isotopic Evidence for Long-Distance and Local Fluid Migrations
Alteration Brines Chlorite Illite Isotopes Meteoric Water Precambrian Unconformity Ontario
2011/12/6
Abstract: Chlorite and illite are commonly associated with ubiquitous secondary K-rich feldspar in the rocks located immediately above and below the Precambrian-Paleozoic unconformity in southwestern ...
Electron Microscopy Study of Volcanic Tuff Alteration to Illite-Smectite under Hydrothermal Conditions
Hydrothermal Alteration Illite-Smectite SEM-EDS TEM-AEM Volcanic Tuff
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
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...
Chemical Changes and Genesis of Secondary Minerals during the Alteration of Biotites from Ignimbrites in the Tazzeka Mountain (Morocco)
Alteration Biotite Chlorite Ignimbrite Illite Structural Formula
2011/12/6
Abstract: The Tazzeka Mountain, located approximately 20 km south of Taza, eastern Morocco, is composed of a Westphalian volcano-sedimentary complex. It contains rhyolitic ignimbrites with the followi...
The Formation of Sulfides during Alteration of Biotite to Chlorite-Corrensite?
TEM AEM Altered Biotite Biotite Chlorite Corrensite Hydrobiotite Pyrite Sphalerite
2011/12/8
Abstract: Transmission electron microscopy/analytical electron microscopy (TEM/AEM) were utilized to study pyrite and sphalerite inclusions in chlorite or mixed-layer chlorite-corrensite from an analc...
Low-Temperature Alteration in Tuffs from Yucca Mountain, Nevada
Alteration Clays Coatings Glass Silica Smectite Tuff Weathering Yucca Mountain Zeolites
2011/12/2
Abstract: The structure, chemistry and distribution of hydrothermal alteration and weathering products of feldspars and glass in 3 samples of Yucca Mountain tuffs (GSW G4 borehole at a depth of 1531 f...
Alteration of microbially precipitated iron oxides and hydroxides
Alteration microbially precipitated iron oxides hydroxides
2012/4/1
Iron oxide and hydroxides can be precipitated from solution with both Fe21 and Fe31 states by a microbial consortium enriched from surface water draining a granitic batholith. The Fe21/Fe31 ratio of t...
Comparative Study of the Mobility of Major and Trace Elements During Alteration of an Andesite and a Rhyolite to Bentonite, in the Islands of Milos and Kimolos, Aegean, Greece
Alteration Andesite Bentonite Element Mobilization Mordenite Phosphates REE Fractionation Residual Enrichment Rhyolite Smectite Water:Rock Ratio
2011/12/8
Abstract: Progressive alteration by seawater of an andesite in the Aegean Island of Milos and an ignimbrite in the Aegean Island of Kimolos, Greece, formed bentonites with or without zeolites. Both pr...
Transmission electron microscopy of muscovite alteration of tourmaline
Transmission electron microscopy muscovite alteration tourmaline
2012/3/31
Partially sericitized tourmaline from a pegmatite was investigated using high-resolution transmission electron microscopy (HRTEM). Fine-grained muscovite crystals form exten-sive narrow veinlets prefe...
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...