Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"hydrous minerals"”.
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Emerging stable isotope techniques in hydrothermal research: new methods applied to carbonates and hydrous minerals in ore deposits and geothermal fields
… systems. Significantly, isotopic signals in minerals reflect conditions of crystallisation, and subsequent alteration history. In hydrothermal systems, isotope tools have been applied to interpret fluid origin, temperature, and interaction with host rock. The research carried out here makes …
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A stable isotope study of the Kaap Valley Tonalite, Barberton Mountain Land, South Africa
… alteration and increased proportions of hydrous minerals occur along the KVT and Barberton greenstone belt contact zone, and along major shear zones within the KVT.
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Mineral Equilibrium Constraints on the Feasibility of Diffusively-Fluxed Melting in the Continental Crust
… occurs by melting through the breakdown of hydrous minerals. However, melting due to the influx of water has been recognised in anatectic amphibolite-facies composite grey gneisses, metagreywackes and low-pressure metapelites, and has consequently been proposed as an alternative mechanism …
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Fluid Release During Eclogite Formation, North Qaidam Terrane, Western China
… path crosses the terminal stability boundary of hydrous minerals. Fluid release rates spike at ~560 kg/m<sup>3</sup>/Myr at the stability limit of amphibole and ~510 kg/m<sup>3</sup>/Myr at the stability limit of lawsonite. Such spikes in fluid release rates are interpreted to increase the …
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Relationships between crystal structure, bonding and thermal stability of amphiboles
… suggest that the amphiboles are potential index minerals for the physical conditions of their formation. Hydrothermal stability studies of several amphibole endmembers have demonstrated that the FeMg₋₁ substitution produces a wide spread in thermal stability. The crystal structure, upon …
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Advances in Subduction Zone Processes
… resulting in the breakdown of volatile-bearing minerals and producing anhydrous minerals and a free fluid phase. Previous works attempting to understand the evolution of subducted lithologies have provided a firm foundation in which to apply field work, computational thermodynamic modeling, and …
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Topographic reconstructions of the Variscan Belt of Western Europe through the study of fossil hydrothermal systems
This thesis presents the first stable isotope quantification of paleoaltimetry for the Variscan Belt of Western Europe that integrates late-Carboniferous hydrogen isotope ratios of meteoric water in the internal zones in the Armorican Massif (AM) and the French Massif Central (FMC) with …
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Measurement of elastic properties of silicates at realistic mantle pressures
… for the elastic properties of mantle minerals at high pressures and temperatures. In this study MHz ultrasonic measurements have been used to determine the velocities of P and S acoustic waves in mantle minerals at mantle conditions. These results are used to constrain the properties …