Global ETD Search
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Showing 1 to 9 of 9 for “"Geothermometer"”.
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A comparison of the Nickel and the conventional geothermometers with respect to the Jagersfontein and the Matsoku kimberlite peridotite xenolits
… et al., 1996; T-Ryan) calibrations of the Ni geothermometer has been evaluated on two suites of geochemically and geothermobarometrically well characterised mantle xenoliths from Matsoku and Jagersfontein by comparison to the more commonly used conventional geothermometers. The two published …
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CO₂ and Heat Release from Magmatic Hydrothermal Systems: Insights from CO₂ Flux and Other Modern Methods
… to units of temperature using a pre-existing CO2 geothermometer. Results show good correlation between geothermometer temperatures and measured aquifer temperatures at Wairakei-Tauhara. Geothermometer results at Reporoa suggest high reservoir temperatures. Chapter 7 applies the geothermometer …
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Salobo Sequence, Carajas, Brazil: Geology, Geochemistry And Metamorphism
… of 750{dollar}spcirc{dollar}C (garnet-hornblende geothermometer); the associated fluids had P{dollar}sb{lcub}rm CO2{rcub}{dollar} {dollar}>{dollar} P{dollar}sb{lcub}rm H2O{rcub}{dollar} and log f{dollar}sb{lcub}rm O2{rcub}{dollar} from {dollar}-{dollar}18 to {dollar}-{dollar}22. Garnet-biotite and …
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Ghost granophyre: A new texture with implications for plagiogranite differentiation and Ti-in-Quartz thermometry
… question the applicability of the Ti-in-Quartz geothermometer—a powerful and widely used tool for estimating crystallization temperatures in silicic igneous lithologies generally—to situations like Troodos where pervasive mineralogical reactions occur and drive bulk compositional differentiation …
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Theory and Utility of the Three Isotope Fractionation Relationship
… purpose of calibration the three oxygen isotope geothermometer. The three isotope geothermometer concept used here is applied similarly to the more common two oxygen isotope thermometer, but utilizes a somewhat independent assumption. For mineral-water equilibrium systems, because the two-isotope …
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Petrology of the Taconian-Acadian Overlap Zone, Hartland Belt, Western Connecticut
… were calculated by simultaneously solving for a geothermometer and a geothermobarometer in low-variance assemblages. All of the possible equilibria for each sample were then calculated using an internally consistent thermodynamic database with the software TWEEQU (thermobarometry with estimations …
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LITHIUM ENRICHMENT IN ANATECTIC PEGMATITES: NEW INSIGHTS FROM THE THERMOMETAMORPHIC AUREOLE OF THE ADAMELLO BATHOLITH
… metapelite-derived pegmaties. The Ti-in-zircon geothermometer confirms that anatectic pegmatites crystallized at the peak metamorphic temperature calculated through phase equilibria modelling. Once defined that Li-enriched pegmatites are anatectic, tourmaline was used to study the continous …
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Blueschists and associated rocks in the south Sepik region, Papua New Guinea; field relations, petrology, mineralogy, metamorphism and tectonic setting
… a minimum of 420°C from the calcite-dolomite geothermometer, and 444° ± 20°C from coexistence of chloritoid, garnet, albite paragonite and quartz. A pressure of 10-11 kbar at 500°C is calculated from garnet, epidote, albite, paragonite and quartz in the highest grade blueschists. Corrections …
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Studies of Magmatic Systems
… for a basanite with different olivine-spinel geothermometers. While olivine spinel pair records the evolution of the basanite during crystallization, low temperatures calculated with the geothermometers are unrealistic. This is likely due to the presence of significant amounts of Ti in our …