QEMSCAN analysis of Green River Formation oil shale samples, Skyline 16 core, eastern Uinta basin, UT

Conclusions in the presentations: 1. QEMscan analysis reveals mineralogic textures dominated by dolomite, illite, and calcite. 2. A few interpretations are made in regards to the documented compositional results generated automatically by the QEMscan: "Background" is assumed to reflect organic matter content, as organic carbon is below the instrument detection limit. "Plagioclase" is interpreted as an iron-rich variant of illite, and not plagioclase. "Quartz" content is likely biogenic silica rather than detrital quartz. 3. Variations in mineralogy between samples documented here are broadly in line with stratigraphic variations as predicted from detailed geologic description (Birgenheier & Vanden Berg, 2011). 4. The nature of intersample variability needs to be further evaluated with additional samples from the same intervals.