Title

Origin of Quartz Clusters in the Rhyolite Dike at Medicine Park, Oklahoma

Presenter Information

Michelle Mild

Department

Geosciences and Geological and Petroleum Engineering

Major

Geology and Geophysics

Research Advisor

Hogan, John Patrick

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Funding Source

OURE; Dr. Hogan

Abstract

The Rhyolite Dike at Medicine Park contain quartz clusters which currently have two proposed models for their origin: Synneusis, which occurs while the quartz is crystallizing, or resorption which occurs while the crystals are dissolving. Each of these models predict a different scenario for the character of the quartz clusters. The Synneusis model requires quartz crystals to show clean, sharp boundaries between the shared faces of the crystals while the resorption model would likely show disordered clusters. In order to test these models, qualitative observations with a petrographic microscope using thin sections will be used to describe the quartz crystals. Cathodoluminescene (CL) on the scanning electron microscope (SEM) will also be used to determine zoning due to Ti variations. Lastly, the crystallographic orientations of these quartz crystals will be determined using both the EBSD on the SEM scope, and a universal stage with a petrographic microscope.

Biography

Michelle Mild is a senior at Missouri S&T and is working toward a B.S. in Geology and geophysics. She is expected to graduate in May 2016, at which point she’d like to go onto graduate school to pursue a Master’s Degree. In her free time, Michelle likes to read, rollerblade, and play video games.

Research Category

Research Proposals

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hall

Presentation Date

15 Apr 2015, 1:00 pm - 3:00 pm

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Apr 15th, 1:00 PM Apr 15th, 3:00 PM

Origin of Quartz Clusters in the Rhyolite Dike at Medicine Park, Oklahoma

Upper Atrium/Hall

The Rhyolite Dike at Medicine Park contain quartz clusters which currently have two proposed models for their origin: Synneusis, which occurs while the quartz is crystallizing, or resorption which occurs while the crystals are dissolving. Each of these models predict a different scenario for the character of the quartz clusters. The Synneusis model requires quartz crystals to show clean, sharp boundaries between the shared faces of the crystals while the resorption model would likely show disordered clusters. In order to test these models, qualitative observations with a petrographic microscope using thin sections will be used to describe the quartz crystals. Cathodoluminescene (CL) on the scanning electron microscope (SEM) will also be used to determine zoning due to Ti variations. Lastly, the crystallographic orientations of these quartz crystals will be determined using both the EBSD on the SEM scope, and a universal stage with a petrographic microscope.