Mineral Heterogeneity Characterization of the Lacustrine Yanchang Shales, Ordos Basin Using Micro-Fourier Transform Infrared Spectroscopy (Micro-FTIR) Technique

Table 3

Mineral composition calculated from micro-FTIR spectra of the Yanchang shale samples.

Sample ID	Spot ID	Mineral composition (wt%)
		Quartz	Feldspar	Calcite	Dolomite	Pyrite	Clay	Illite/smectite	Kaolinite	Chlorite
L-1	#1	32.07	14.24	—	1.3	—	42.54	32.66	—	8.36
	#2	28.26	11.95	—	—	3.2	39.75	24.71	6.54	7.27
	#3	42.39	12.68	—	2.2	—	36.39	24.80	—	10.80
	#4	38.60	13.80	4.95	—	2.05	44.09	31.57	—	11.79
	#5	37.94	13.64	4.1	—	3.11	43.06	26.18	—	15.77
L-2	#6	34.77	15.65	—	—	0.21	47.47	25.06	—	16.36
	#7	26.09	15.29	5.33		0.44	44.01	33.06	—	10.64
	#8	36.56	13.11	—	1.6	—	49.64	21.41	—	12.53
	#9	30.24	10.12	—	11.04	—	42.97	27.18	—	—
	#10	31.47	12.51	4.01	—	1.8	45.67	22.71	8.22	—