It is important to understand what triggers silicic eruptions because of the implications for modern-day systems. Here, we use phase equilibria modeling to determine to what extent magmas within the crust are induced to erupt due to external triggers (e.g. earthquakes; new magma injection) and to what extent they naturally evolve to a point where eruption is inevitable. Modelling the effect of fluid exsolution on the increase in system volume demonstrates that rhyolitic magmas can reach internal triggering. We find that internal triggering is effective in magmas that are stored at 10 km or shallower, revealing a window of eruptibility within the Earthâs shallow crust.
Optical mineralogy is a skillset typically introduced in a microscope lab supporting lessons in Earth materials in the classroom. Challenges arise because students do not know what to look for when looking down the microscope. Eight videos were developed with accompanying pre-lab questions and hosted online as part of semester-long, undergraduate Earth materials courses at Vanderbilt University and Illinois State University. Vanderbilt students self-report increased confidence and their testing grades in 2015, when videos were implemented, were comparable or improved compared to the 2014 offering with no videos used.
| Identifer | oai:union.ndltd.org:VANDERBILT/oai:VANDERBILTETD:etd-07182016-211958 |
| Date | 26 July 2016 |
| Creators | Tramontano, Samantha |
| Contributors | Guilherme Gualda, Calvin Miller, Steven Goodbred |
| Publisher | VANDERBILT |
| Source Sets | Vanderbilt University Theses |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.vanderbilt.edu/available/etd-07182016-211958/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Vanderbilt University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
Page generated in 0.0016 seconds