Petrological characteristics and shale oil enrichment of lacustrine fine-grained sedimentary system: A case study of organic-rich shale in first member of Cretaceous Qingshankou Formation in Gulong Sag, Songliao Basin, NE China |
Bo LIU,Jiaxin SHI,Xiaofei FU,Yanfang LYU,Xianda SUN,Lei GONG,Yunfeng BAI |
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Fig. 2. Triangle diagram of mineral compositions of fine-grained rock in the Qing-1 Member, Gulong Sag (72 samples). I—limestone facies; II—clayey marlstone facies; III—siliceous marlstone facies; IV—clayey mudstone facies; V—siliceous mudstone. |