Journal of Palaeogeography

Table 1 Main bulk coal quality parameters of the Late Permian coal seams from the Songhe mining area, western Guizhou

From: Using geophysical logs to identify Milankovitch cycles and to calculate net primary productivity (NPP) of the Late Permian coals, western Guizhou, China

Coal Seam No.	A_d (%)	V_daf (%)	S_{t, d} (%)	C_daf (%)	ARD (g⋅cm⁻³)
17#	17.41	21.03	0.40	79.63	1.33
18#	17.70	20.77	0.67	80.32	1.34
17 + 18#	NO DATA

All data are from the geological survey report of the Guizhou Administration of Coal Geology
A Ash, V Volatile, S_t Total sulfur, C Carbon, ARD Apparent density, d Dry basis, daf Dry ash-free basis

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