Mineral Heterogeneity Characterization of the Lacustrine Yanchang Shales, Ordos Basin Using Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR) Technique

Figure 3

Photos of cores and thin sections of shale samples L-1 and L-2. (a) Silty laminated shale (sample ID L-1, 1400 m). (b) Massive argillaceous shale (sample ID L-2, 1625 m). (c) Thin section images of sample L-1, showing silty laminae in silty laminated shale that can be seen by naked eyes. (d) Thin section images of sample L-2, showing argillaceous shale without silty laminae.