Table 2 Bulk geochemical features of Da’anzhai shale.

From: Paleosedimentary environmental reconstruction and mechanisms of the response to the Toarcian OAE in a lacustrine shale system

Submember

Depth (m)

TOC (%)

S1 (mg HC/g Rock)

S2 (mg HC/g Rock)

S3 (mg HC/g Rock)

HI (mg HC/g TOC)

PI

Tmax (°C)

δ13Corg (‰)

Upper

2874.70

0.10

–

–

–

–

–

–

− 25.47

2880.69

0.52

0.06

0.15

0.86

27.87

0.29

463

− 23.99

2889.67

2.10

0.32

1.29

1.14

61.63

0.20

456

− 23.07

2890.87

1.08

–

–

–

–

–

–

− 23.18

2896.49

0.68

0.24

0.58

1.02

85.48

0.29

453

− 26.38

2899.07

1.09

0.90

0.99

0.88

90.74

0.48

447

− 27.41

2902.47

2.88

4.36

6.57

2.25

227.80

0.40

447

− 29.42

Middle

2904.31

2.46

4.61

6.54

1.83

265.38

0.41

445

− 29.56

2906.87

2.19

4.51

5.87

1.95

267.80

0.43

442

− 29.18

2909.06

0.75

–

–

–

–

–

–

− 29.02

2909.80

2.23

–

–

–

–

–

–

− 29.55

2912.85

0.46

0.39

0.57

0.76

124.44

0.41

426

− 28.90

2913.56

2.00

3.45

4.74

1.43

236.28

0.42

434

− 29.65

2915.12

1.92

2.14

5.16

2.06

268.78

0.29

441

− 29.83

2915.86

1.23

–

–

–

–

–

–

− 29.25

2916.72

1.07

–

–

–

–

–

–

− 28.83

2917.91

1.48

2.10

3.03

1.48

205.03

0.41

436

− 29.12

2920.25

2.69

4.74

6.54

2.22

243.69

0.42

439

− 28.73

2922.68

2.36

3.47

5.79

2.08

245.19

0.38

432

− 28.98

2923.89

1.40

2.62

3.14

1.97

224.86

0.45

432

− 28.58

2924.91

1.97

4.24

5.58

1.75

283.33

0.43

440

− 28.67

2925.93

1.38

2.61

2.06

1.63

149.24

0.56

434

− 28.74

2928.28

1.46

2.15

3.17

1.44

217.22

0.40

446

− 28.12

2930.08

3.63

6.56

9.21

2.35

253.98

0.42

438

− 28.64

2932.11

1.19

1.20

2.33

1.26

195.51

0.34

447

− 27.46

2934.81

2.10

3.16

3.38

1.79

160.96

0.48

444

− 26.81

2936.05

3.54

8.14

8.39

2.91

237.23

0.49

438

− 26.12

2938.35

3.36

6.97

8.05

2.44

239.52

0.46

441

− 27.41

2939.36

1.79

3.04

4.06

1.62

226.98

0.43

447

− 28.42

2940.55

–

–

–

–

–

–

–

− 26.44

2942.44

0.94

0.65

1.19

1.17

126.51

0.35

448

− 25.85

2943.32

1.94

3.60

3.96

1.46

203.64

0.48

437

− 27.96

2944.67

2.19

2.61

3.68

2.69

168.32

0.41

445

− 26.91

2945.65

0.85

–

–

–

–

–

–

− 26.58

2946.04

–

–

–

–

–

–

–

− 27.58

2947.40

–

–

–

–

–

–

–

− 27.37

2947.78

–

–

–

–

–

–

–

− 26.02

Lower

2950.53

0.14

–

–

–

–

–

–

− 28.13

2953.48

0.49

0.59

0.46

0.79

94.00

0.56

445

− 25.97

2958.21

0.53

0.11

0.22

1.03

40.74

0.33

452

− 24.48

  1. TOC total organic carbon, HI hydrogen index, PI production index.
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