dc.contributor.advisor |
Reed, Mark |
|
dc.contributor.author |
Acosta, Marisa |
|
dc.date.accessioned |
2020-12-08T15:50:00Z |
|
dc.date.available |
2020-12-08T15:50:00Z |
|
dc.date.issued |
2020-12-08 |
|
dc.identifier.uri |
https://scholarsbank.uoregon.edu/xmlui/handle/1794/25915 |
|
dc.description.abstract |
DISSERTATION 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This dissertation includes previously published and unpublished co-authored material.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.language.iso |
en_US |
|
dc.publisher |
University of Oregon |
|
dc.rights |
All Rights Reserved. |
|
dc.subject |
Butte porphyry Cu |
en_US |
dc.subject |
deformation |
en_US |
dc.subject |
quartz |
en_US |
dc.subject |
quartz growth |
en_US |
dc.subject |
recrystallization |
en_US |
dc.subject |
TitaniQ |
en_US |
dc.title |
Titanium in quartz during growth and deformation under hydrothermal-magmatic conditions |
|
dc.type |
Electronic Thesis or Dissertation |
|
thesis.degree.name |
Ph.D. |
|
thesis.degree.level |
doctoral |
|
thesis.degree.discipline |
Department of Geological Sciences |
|
thesis.degree.grantor |
University of Oregon |
|