Petrological Characteristics and Rock Nomenclature of Sedimentary Bauxite Gas Reservoir: A Case Study of Bauxite in Taiyuan Formation of Ordos Basin

Figure 3

Mineral composition of bauxite in Taiyuan formation: (a) C3-25-11, 3812.28 m, bean-shaped and encrusted texture; the distribution of diaspore is aggregate, and clay minerals are mainly illite; (b) L47, 4119.0 m, acicular chlorite grows in dissolved pores of grains; (c) L58, 4049.84 m, idiomorphic biconical anatase; (d) C3-25-11, 3795.18 m, grey bauxite; a small part of siderite is dissolved to form micropores in grain; (e) L58, 4048.16 m, short columnar diaspore; (f) L47, 4124.00 m, pyrite in the form of cryptocrystalline aggregates is scattered.