Titanium in quartz during growth and deformation under hydrothermal-magmatic conditions

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dc.contributor.advisorReed, Mark
dc.contributor.authorAcosta, Marisa
dc.date.accessioned2020-12-08T15:50:00Z
dc.date.available2020-12-08T15:50:00Z
dc.date.issued2020-12-08
dc.description.abstractDISSERTATION ABSTRACT Marisa Dawn Acosta Doctor of Philosophy Department of Earth Sciences September 2020 Title: Titanium in quartz during growth and deformation under hydrothermal-magmatic conditions 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 This dissertation includes previously published and unpublished co-authored material.en_US
dc.identifier.urihttps://hdl.handle.net/1794/25915
dc.language.isoen_US
dc.publisherUniversity of Oregon
dc.rightsAll Rights Reserved.
dc.subjectButte porphyry Cuen_US
dc.subjectdeformationen_US
dc.subjectquartzen_US
dc.subjectquartz growthen_US
dc.subjectrecrystallizationen_US
dc.subjectTitaniQen_US
dc.titleTitanium in quartz during growth and deformation under hydrothermal-magmatic conditions
dc.typeElectronic Thesis or Dissertation
thesis.degree.disciplineDepartment of Geological Sciences
thesis.degree.grantorUniversity of Oregon
thesis.degree.leveldoctoral
thesis.degree.namePh.D.

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