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Titanium in quartz is a promising tool with which to investigate processes of quartz growth and deformation. In this dissertation, I present and interpret the results of experimentally synthesized Ti-doped quartz crystals and shed light on sources of complexity that arise during non-equilibrium growth at 800℃ and 1 kbar. I use images of the Ti distributions in quartz from the Butte, Montana, porphyry Cu-Mo deposit to detail the sequence of events by which barren quartz and quartz-molybdenite veins are formed. I compare temperature estimates made with Ti concentrations to other independent methods of temperature estimates to show that the dark growth bands of CL-euhedral hydrothermal quartz record near-equilibrium growth and that the bright growth bands of CL-euhedral quartz are markers of disequilibrium “kinetic effects”. Lastly, I present a possible mechanism for the formation of oscillatory CL-bright and -dark growth bands under constant pressure and temperature conditions at low supersaturation.
This dissertation includes previously published and unpublished co-authored material.
Advisor: | Reed, Mark H., Watkins, James M. |
Commitee: | Guenza, Marina G., Dilles, John H., Giachetti, Thomas |
School: | University of Oregon |
Department: | Department of Geological Sciences |
School Location: | United States -- Oregon |
Source: | DAI-B 82/4(E), Dissertation Abstracts International |
Source Type: | DISSERTATION |
Subjects: | Geology, Hydrologic sciences, Thermodynamics, Low Temperature Physics |
Keywords: | Butte porphyry Cu, Deformation, Quartz, Quartz growth, Recrystallization, TitaniQ |
Publication Number: | 28148228 |
ISBN: | 9798684690747 |