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Table 1 Maceral and mineral compositions of the Lower Cretaceous coals in NE China

From: Characteristics of Early Cretaceous wildfires in peat-forming environment, NE China

Area Sample No. Total macerals (vol.%) Total minerals (vol.%) Percentage of maceral groups in the total macerals (vol.%, mmf) Percentage of inertinite macerals in the total macerals (vol.%, mmf) Huminite Reflectance (%Ro)
Huminite Liptinite Inertinite Fusinite Semifusinite Sclerotinite Macrinite Micrinite Inertodetrinite
Hailar Basin 401 100.0 0.0 84.7 0.0 15.3 14.6 0.7 0.0 0.0 0.0 0.0 0.42
  407 99.5 0.5 84.2 0.0 15.8 15.8 0.0 0.0 0.0 0.0 0.0 0.38
  411 99.8 0.2 79.4 0.0 20.6 18.2 2.4 0.0 0.0 0.0 0.0 0.43
  416 93.8 6.2 93.6 0.0 6.4 4.7 1.7 0.0 0.0 0.0 0.0 0.40
  419 97.4 2.6 87.2 0.0 12.8 12.8 0.0 0.0 0.0 0.0 0.0 0.42
  426 98.3 1.7 89.2 0.0 10.8 10.8 0.0 0.0 0.0 0.0 0.0 0.40
  431 98.8 1.2 90.9 0.0 9.1 9.1 0.0 0.0 0.0 0.0 0.0 0.39
  436 98.5 1.5 83.8 0.0 16.2 16.2 0.0 0.0 0.0 0.0 0.0 0.35
  441 100.0 0.0 81.4 0.0 18.6 18.6 0.0 0.0 0.0 0.0 0.0 0.40
  446 99.6 0.4 95.6 0.0 4.4 4.4 0.0 0.0 0.0 0.0 0.0 0.30
  452 99.4 0.6 67.2 0.0 32.8 32.8 0.0 0.0 0.0 0.0 0.0 0.32
  455 100.0 0.0 40.2 0.0 59.8 55.8 4.0 0.0 0.0 0.0 0.0 0.41
Sanjiang Basin 302 100.0 0.0 92.0 2.3 5.7 3.5 2.2 0.0 0.0 0.0 0.0 0.55
  305 100.0 0.0 88.7 1.5 9.8 6.8 3.0 0.0 0.0 0.0 0.0 0.41
  310 99.8 0.2 74.9 0.8 24.3 19.2 5.1 0.0 0.0 0.0 0.0 0.57
  311 99.3 0.7 91.5 2.2 6.3 1.5 4.8 0.0 0.0 0.0 0.0 0.60
  313 99.0 1.0 88.1 9.2 2.7 0.0 2.7 0.0 0.0 0.0 0.0 0.44
Erlian Basin 201 99.2 0.8 64.2 1.2 34.6 6.5 15.0 0.0 0.0 0.0 13.1 0.32
  203 98.1 1.9 68.7 5.4 25.9 4.9 4.2 0.0 1.2 0.2 15.4 0.40
  204 95.2 4.8 86.3 2.3 11.3 5.0 2.7 0.0 0.0 0.0 3.6 0.33
  205 91.0 9.0 89.2 1.5 9.2 1.3 2.7 0.0 0.0 0.0 5.2 /
  206 96.3 3.7 96.8 1.9 1.3 0.4 0.0 0.0 0.0 0.0 0.9 0.33
  207 94.2 5.8 98.7 0.6 0.6 0.2 0.0 0.0 0.0 0.0 0.4 /
  208 92.0 8.0 29.3 9.5 61.2 20.4 19.7 0.2 5.0 0.0 15.9 0.42
  209 94.4 5.6 54.3 1.4 44.3 16.6 11.2 0.0 0.2 0.0 16.3 /
  210 98.0 2.0 31.1 2.2 66.7 33.1 17.9 0.6 0.6 0.0 14.5 0.39
  211 96.9 3.1 67.5 1.7 30.9 18.0 2.1 0.0 0.0 0.0 10.8 /
  212 94.6 5.4 14.4 0.6 85.0 39.5 11.9 0.0 0.2 0.0 33.4 /
  213 97.6 2.4 34.2 2.0 63.7 29.6 9.9 0.0 0.4 0.2 23.6 /
  214 98.0 2.0 58.8 6.1 35.1 7.4 14.9 0.0 1.0 0.0 11.8 0.34
  215 97.4 2.6 63.1 9.4 27.4 7.3 8.2 0.2 0.6 0.0 11.1 /
  216 89.0 11.0 95.1 3.9 1.0 0.2 0.0 0.0 0.2 0.0 0.6 0.32
  217 94.1 5.9 29.9 1.1 69.0 44.4 6.8 0.2 0.4 0.0 17.2 /
  218 97.2 2.8 83.7 15.0 1.2 0.2 0.0 0.0 0.0 0.0 1.0 /
  219 82.3 17.7 99.3 0.5 0.2 0.0 0.0 0.0 0.0 0.0 0.2 /
  220 98.8 1.2 32.1 0.4 67.5 19.9 27.2 0.0 0.2 0.0 20.2 0.36
  14–1* 98.6 1.4 68.4 0.2 31.4 22.8 3.7 0.7 0.2 0.0 4.0 /
  14–2* 97.6 2.4 76.2 1.4 22.4 8.1 3.6 0.4 0.0 0.0 10.3 /
  14–3* 98.8 1.2 71.5 1.8 26.7 11.5 3.5 1.0 0.2 0.0 10.5 /
  11–1* 99.1 0.9 14.9 0.5 84.6 54.2 6.1 0.2 1.9 0.0 22.2 /
  11–2* 84.5 15.5 86.9 1.5 11.6 2.2 0.4 0.4 0.0 0.0 8.6 /
  1. *Data from the Tengger Formation of the Huolinhe sag in the Erlian Basin (Xu 2011). mmf Mineral-matter-free (= no mineral matter)