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Lithofacies paleogeography and exploration significance of Sinian Doushantuo depositional stage in the middle-upper Yangtze region, Sichuan Basin, SW China
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Zecheng WANG,Jingjiang LIU,Hua JIANG,Shipeng HUANG,Kun WANG,Zhengyu XU,Qingchun JIANG,Shuyuan SHI,Mengyi REN,Tianyu WANG
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Table 2 Analysis data of source rock samples of Doushantuo Formation from the periphery of Sichuan Basin.
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| Section name | Strata | Lithology | Sedimentary environment | TOC/% | Kerogen δ13C/‰ | Ro/% | Number of sample | | Ebianxianfeng | Z2d2 | Mudstone | Lagoon | 0.78-4.64/2.42 | -32.4 - -29.0/-30.4 | 3.26-3.54 | 6 | | Songlinliujing | Z2d2 | Mudstone | Shallow continental shelf | 0.11-4.64/1.51 | -31.5 - -30.3/-30.8 | 2.08-2.34 | 35 | | Songlindashidun | Z2d2 | Mudstone | Shallow continental shelf | 0.62-3.33/1.92 | -31.2 - -30.7/-30.9 | 3.46-3.82 | 13 | | Xiushanxiaoxi | Z2d2 | Mudstone | Shallow continental shelf | 1.69-13.87/6.26 | -32.0 - -29.7/-31.4 | 3.14-3.46 | 43 | | Chengkoumingyue | Z2d2 | Mudstone | Deep continental shelf | 0.75-13.10/3.29 | -32.8 - -29.7/-32.1 | 2.86-3.22 | 60 |
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