Black shale formation environment and its control on shale oil enrichment in Triassic Chang 7 Member, Ordos Basin, NW China

ZHANG Bin,MAO Zhiguo,ZHANG Zhongyi,YUAN Yilin,CHEN Xiaoliang,SHI Yuxin,LIU Guanglin,SHAO Xiaozhou

Fig. 6. Intersection diagram of inorganic elements in the black shale of the Chang 7 Member of the Well Feng 75 (oxidation-reduction boundary according to reference [17]).