Fractal Properties of Various Clay Minerals Obtained from SEM Images

Figure 1

(a) Location and structural division of the Beibuwan Basin [32] and (b) geological map of the Sanlutian coalfield and location of the Scientific Drilling Project of Gas Hydrates in the Qilian Mountains [35–38]. 1: upper Jiangcang, 2: lower Jiangcang, 3: upper Muli, 4: lower Muli, 5: lower Jurassic, 6: upper Triassic, 7: concordant stratigraphic boundary, 8: discordant stratigraphic boundary, 9: normal fault, 10: reverse fault, 11: supposed fault, 12: no gas hydrate borehole, 13: gas hydrate borehole, and 14: research boundary.