Table 5 The inertinite abundance and pO₂ characteristics in Early Cretaceous coal-bearing strata in China. I_AVG: Mean inertinite abundance; N: Samples number; R: Percentage range; S: Standard deviation

 Yang 1996

10.8

4

5.0–19.1

5.3

25

Jibei Stage (Berriasian–Hauterivian)/Huolinhe F./Huolinhe Coalfield

Inner Mongolia

5.3

4

2.0–8.5

2.5

22

Jibei Stage (Berriasian–Hauterivian)/Huolinhe F./Yuanbaoshan Coalfield

Inner Mongolia

 Potential evaluation of coal resources in Inner Mongolia

34.7

2

26.7–42.6

8.0

28

Jibei Stage (Berriasian–Hauterivian)/Huolinhe F./Erenhot Basin

Inner Mongolia

 Han 1996

42.4

4

26.1–55.8

11.2

29

Rehei Stage (Barremian)/Yimin F./Jalainur Coalfield

Inner Mongolia

 Yang 1996

37.5

2

35.0–40.0

2.5

29

Rehei Stage (Barremian)/Yimin F./Yimin Coalfield

Inner Mongolia

25.0

2

20.0–30.0

5.0

27

Rehei Stage (Barremian)/Yixian F./Hegang Coalfield

Heilongjiang

 Han 1996

9.4

11

1.2–20.8

6.1

24

Rehei Stage (Barremian)/Yixian F./Jixi Coalfield

Heilongjiang

18.5

6

7.8–39.8

11.4

26

Rehei Stage (lower Aptian)/Jiufotang F./Boli Coalfield

Heilongjiang

10.7

3

6.9–14.3

3.0

24

Rehei Stage (lower Aptian)/Jiufotang F./Shuangyashan Coalfield

Heilongjiang

 Yang 1996

16.5

4

12.0–19.0

2.7

26

Liaoxi Stage (upper Aptian)/Shahai F./Fuxin Coalfield

Liaoning

5.0

4

2.0–8.0

2.2

22

Liaoxi Stage (upper Aptian)/Shahai F./Tiefa Coalfield

Liaoning

2.2

4

1.0–3.4

0.9

20

Liaoxi Stage (upper Aptian)/Shahai F./Yingcheng Coalfield

Liaoning

 Potential evaluation of coal resources in Hebei

31.1

3

20.7–39.4

7.8

28

Liaoxi Stage (Aptian)/Fuxin F./Yushugou Mine Field, Guyuan

Hebei

28.3

6

10.0–50.0

13.6

28

Liaoxi Stage (Aptian)/Fuxin F./Wanquan Coalfield

Hebei