BIB-SEM/EDS showing Niobrara Oil Shale

picture-of-the-week-2016-cw40-wmi-and-cryo-bib-sem

BIB-SEM/EDS image showing Niobrara Oil Shale. Backscattered electron image with transparent EDS-overlay on BIB-milled surface shows carbonate lenses (purple) in shale matrix (green). The carbonate porosity is filled with organic matter. A twin-sample was injected with molten Wood’s metal, which fills the carbonate porosity (inset), presumably having replaced the hydrocarbons from the pore space.
Further reading:
Klaver et al. (2015, doi: 10.1111/gfl.12128)
Schmatz et al. (2016)

BIB-SEM/EDS showing Niobrara Oil Shale