dc.contributor.advisor |
Miller, Marli |
|
dc.contributor.author |
Jarrett, Corey |
|
dc.date.accessioned |
2018-04-10T15:09:18Z |
|
dc.date.available |
2018-04-10T15:09:18Z |
|
dc.date.issued |
2018-04-10 |
|
dc.identifier.uri |
http://hdl.handle.net/1794/23181 |
|
dc.description.abstract |
The exposed shear zone within the footwall of the Badwater turtleback presents an excellent opportunity to explore the brittle-ductile transition. Within this shear zone, a variety of lithologies preserve the last stages of crystal-plastic deformation concurrent with exhumation of the turtleback. The included field study captures a snapshot of each lithologic element during the last stages of ductile deformation.
The exposed shear zone's journey through the brittle-ductile transition is analyzed using the deformation mechanisms of calcite and quartz. A history of strain partitioning is constructed through comparison of the strain and temperature environments needed to facilitate each mechanism of crystal-plastic deformation. As the shear zone cooled, strain was partitioned from quartz-rich mylonitic gneiss to the calcite-dominated marbles and mylonites. Correlation of deformation temperatures with previous studies further constrains the timing of the last stage of ductile deformation to between 13 and 6 Ma. |
en_US |
dc.language.iso |
en_US |
|
dc.publisher |
University of Oregon |
|
dc.rights |
Creative Commons BY-NC-ND 4.0-US |
|
dc.subject |
Calcite |
en_US |
dc.subject |
Death Valley |
en_US |
dc.subject |
Microtectonics |
en_US |
dc.subject |
Mylonite |
en_US |
dc.subject |
Shear zone |
en_US |
dc.subject |
Structural geology |
en_US |
dc.title |
Analysis of an Exposed Portion of the Badwater Turtleback Shear-zone, Death Valley, California, USA |
|
dc.type |
Electronic Thesis or Dissertation |
|
thesis.degree.name |
M.S. |
|
thesis.degree.level |
masters |
|
thesis.degree.discipline |
Department of Geological Sciences |
|
thesis.degree.grantor |
University of Oregon |
|