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

From: Characteristics and evolution of inertinite abundance and atmospheric pO2 during China’s coal-forming periods

Literature source IAVG, % N R (min–max), % S pO2, % Stage/Formation/Locality Province
Early Cretaceous
 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