搜索结果: 1-14 共查到“凹凸棒石 Isotope”相关记录14条 . 查询时间(0.077 秒)
Thermoanalytical characterization, stable isotope and paleoenvironmental considerations of kaolinite from two genetic sources
Thermoanalytical characterization stable isotope paleoenvironmental considerations kaolinite two genetic sources
2012/3/14
Thermoanalytical characterization, stable isotope and paleoenvironmental considerations of kaolinite from two genetic sources.
Mineralogical and Rb-Sr Isotope Studies of Low-Temperature Diagenesis of Lower Cambrian Clays of the Baltic Paleobasin of North Estonia
Baltic Paleosedimentary Basin Cambrian Low-Temperature Diagenesis Illitization
2011/12/2
Abstract: X-ray diffraction (XRD), Rb-Sr isotope analysis, transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and Fourier transform infrared (FTIR) methods were used t...
Oxygen-Isotope Fractionation between Aluminum-Hydroxide Phases and Water at <60C: Results of Decade-Long Synthesis Experiments
Aluminum Hydroxides Fractionation Factor Gibbsite Oxygen Isotope Synthesis
2011/12/6
Abstract: Oxygen-isotope data were obtained for synthetic aluminum-hydroxide phases precipitated over 65–125 mo and have been compared to results from similar experiments conducted for 3–56 mo. The Al...
Stable Isotope Evolution of Volcanic Ash Layers during Diagenesis of the Miocene Monterey Formation, California
Bentonite Diagenesis Monterey Formation Stable Isotopes Volcanic Ash
2011/12/2
Abstract: The oxygen and hydrogen isotope compositions of volcanic ash layers from coastal outcrops of the Miocene Monterey Formation elucidate the progressive burial diagenesis of glass to bentonite ...
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...
Nitrogen-isotope record of fluid-rock interactions in the Skiddaw Aureole and granite, English Lake District
Nitrogen-isotope record fluid-rock interactions Skiddaw Aureole granite English Lake District
2012/4/1
The Skiddaw Granite and its contact metamorphic aureole in the English Lake District provide an
excellent opportunity to test the capability of the N-isotope system to trace devolatilization and larg...
Comparison of conventional and garnet-aluminosilicate-quartz O isotope thermometry: Insights for mineral equilibration in metamorphic rocks
Comparison of conventional garnet-aluminosilicate-quartz O mineral equilibration metamorphic rocks
2012/4/1
Oxygen isotope thermometry based on fractionations among quartz, garnet, kyanite, silliman-
ite, and potassium feldspar in amphibolite to granulite facies schists and gneisses was compared to
thermo...
Sulfur isotope variability in biogenic pyrite: Reflections of heterogeneous bacterial colonization?
Sulfur isotope variability biogenic pyrite Reflections colonization
2012/4/1
The top 20 cm of sediments at active cold seeps in Monterey Bay, coastal California,contain framboidal pyrite that occurs as infillings and pseudomorphs of the chambers of the tests of foraminifera an...
Oxygen Isotope Compositions of Mixed-Layer Serpentine-Chlorite and Illite-Smectite in the Tuscaloosa Formation (U.S. Gulf Coast): Implications for Pore Fluids and Mineralogic Reactions
Diagenesis Illite-Smectite Oxygen Isotopes Sandstone Serpentine-Chlorite Tuscaloosa Formation
2011/12/8
Abstract: Oxygen isotopic compositions were determined for coexisting mixed-layer serpentine-chlorite (Sp-Ch) and illite-smectite (I-S) from 5 Tuscaloosa Formation sandstone cores sampled between 1937...
Timing and mechanisms of carbon isotope exchange in granulite-facies calc-silicate boudins, Rauer Group, East Antarctica
Timing and mechanisms carbon isotope granulite-facies calc-silicate boudins Rauer Group East Antarctica
2012/4/5
Mineralogicallyzoned,decimeter-diametercalc-silicateboudinsenclosedwithinparag-
neissesfromLittleItalyIsland,RauerGroup,eastAntarcticaunderwentgranulite-facies
metamorphism(P 700¤C900MPa T 840 40C)f...
Stable Isotope Geochemistry of Kaolinite from the “White Section,” Black Ridge, Clermont, Central Queensland: Implications for the Age and Origin of the “White Section”
Inversion Isotopic exchange Kaolinite Late Triassic Low δD Weathering
2011/12/29
Kaolinite from the Black Ridge, Clermont, has relatively low δ18O (12.3‰ to 14.8‰) and very low δD values with a large variation (−120‰ to −85‰). Comparison of these data with those from t...
Oxygen Isotope Measurements of Albite-Quartz-Zeolite Mineral Assemblages, Hokonui Hills, Southland, New Zealand
Albite Diagenesis Formation temperature Heulandite Laumontite Oxygen isotopes Quartz Stilbite Zeolites
2012/1/6
The oxygen isotopes of albite, quartz, and zeolites from the Hokonui Hills, New Zealand, constrain crystallization temperatures and the type of pore fluids present during diagenesis. A section of alte...
Sorption, Desorption, and Isotope Exchange of Cesium (10−9–10−3 M) on Chlorite
Acid treatment Cation exchange Cesium Chlorite Isotope exchange Sorption
2012/1/13
Batch cation-exchange experiments were performed on chlorite, using synthetic ground water containing cesium in the concentration range 10−9–10−3 M. The sorption behavior was complex; with...
Oxygen Isotope Changes during Mica Alteration
Mica Oxygen isotopes Potassium Recrystallization Saponite Weathering
2012/2/1
Oxygen isotope analyses (δO18) of micas that were artificially depleted in K+ indicate little or no isotope exchange during the transformation. The oxidation of iron in K-depleted, iron-rich micas by ...