Origin and characteristics of grain dolomite of Ordovician Ma5 5 Member in the northwest of Ordos Basin, NW China

ZHANG Xi,ZHANG Tingshan,LEI Bianjun,ZHANG Jingxuan,ZHANG Ji,ZHAO Zhongjun,YONG Jinjie

Fig. 5. Core photographs, common slices, and Scanning Electron Microscope Photograph of dolomicrite from Well SD39-62C1. (a) 3 116.38 m, dolomicrite, birdeye structure, common slice; (b) 3 115.37 m, dolomicrite, gypsum pseudo-crystal, common slice; (c) 3 141.20 m, dolomicrite, rodlike gypsum pseudo-crystal, common slice; (d) 3 138.20 m, dolomicrite, gypsum pseudo-crystal, common slice; (e) 3107.45 m, dolomicrite, dense, Scanning Electron Microscope; (f) 3 107.45 m, dolomicrite, cathodoluminescence photograph.