Table 2. Results of FTIR Analysis of Shale Core Samples^a.

sample no.	formation	OH stretching/phyllosilicate	hydroxyl group	C–C stretch/kerogen	aromatic C=C	carbonates	kaolinite	Si–O stretching/quartz	A-factor	C-factor	IAL	IAR
JHK-1	Barren Measures	√	–	–	√	√	√	√	0.42	0.54	0.35	0.53
JHK-2		√	–	√	√	√	√	√	0.38	0.41	0.24	0.62
JHK-3		√	–	√	√	√	√	√	0.41	0.17	0.20	0.45
JHK-4		√	–	√	√	√	√	√	0.35	0.07	0.03	0.61
JHK-5		√	–	√	√	√	√	√	0.52	0.38	0.21	0.55
JHK-6		√	–	√	√	√	√	√	0.38	0.24	0.13	0.48
JHK-7	Barakar	√	–	√	√	√	√	√	0.34	0.32	0.18	0.62
JHK-8		√	–	√	√	√	√	√	0.18	0.26	0.14	0.51
JHK-9		√	–	√	√	√	√	√	0.32	0.29	0.16	0.48
JHK-10		√	–	√	√	√	√	√	0.29	0.29	0.16	0.45
JHK-11		√	–	√	√	√	√	√	0.30	0.27	0.15	0.38
JHK-12		√	–	√	√	√	√	√	0.44	0.38	0.15	0.64
JHK-13		√	–	√	√	√	√	√	0.36	0.19	0.10	0.47
JHK-14		√	–	√	√	√	√	√	0.42	0.18	0.08	0.52
JHK-15		√	–	√	√	√	√	√	0.49	0.41	0.22	0.56

^aExplanations: A-factor = {(2940 + 2850) cm^–1/(2940 + 2850 + 1604) cm^–1}; C-factor = {1740 cm^–1/(1740 + 1604) cm^–1}; IAL, aliphaticity index; IAR, aromaticity index.