Presenter Information

Andrew McEllen


Geosciences and Geological and Petroleum Engineering

Research Advisor

Hogan, John P.

Advisor's Department

Geosciences and Geological and Petroleum Engineering


The Mount Sheridan Gabbro of the Wichita Mountains of south western Oklahoma contains dikes and pods of a coarse grained pegmatite. Initial field work was carried out and samples collected. All samples have been slabbed with a rock saw and described. These samples reveal spectacular examples of the minerals amphibole, feldspar, quartz, and apatite and zircon. The minerals apatite and zircon were investigated u sing the SEM as part of a class. From these slabs, representative examples have been selected for making thin sections. These are prepared by a commercial lab, and I am awaiting their return. I can then complete my descriptions with a petrographic microscope. Rock powders have been prepared for geochemical analyses pending installation of the LAICPMS at UMR. I will also complete geochemical analyses of individual minerals using this equipment and the thin sections.

Presentation Type

Oral Presentation

Document Type


Presentation Date