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

Table 1

Mineral composition and geochemical characteristics of the Yanchang shale samples.

Sample ID	Lithology	Depth (m)	TOC (%)	Ro (%)	Mineral content (%)
					Quartz	Feldspar	Calcite	Dolomite	Pyrite	Clay
L-1	Silty laminated shale	1400	1.7	0.93	35.2	11.1	7.1	2.2	3.1	41.1
L-2	Massive argillaceous shale	1625	3.5	1.02	25.3	15.8	5.2	0	4.2	48.8