Near-Infrared Spectroscopic Study of Chlorite Minerals

Table 1

Description and mineral components of chlorite samples collected from the USGS spectral library in this study.

Components/samples	Clinochlore NMNH83369	Clinochlore GDS157	Clinochlore GDS158	Clinochlore GDS159	Clinochlore Fe SC-CCa-1	Chlorite SMR-13	Prochlorite SMR-14	Thuringite SMR-15
	Mg-rich	Fe-rich	Mg-rich	Mg-rich	Fe-rich	Mg-rich	Fe-rich	Fe-rich
SiO2	32	25.2	27.5	31.3	33.2	31	19.9	24.7
Al2O3	16	19.6	19.8	19.4	25.8	17.3	15.2	21.1
FeO	3.76	25.3	14.1	1.16	16.7	8.34	35.1	37.5
MgO	33.9	16.6	24.7	34.7	16.1	30.2	16.8	7.8
Al/(Al + Si)	0.33	0.44	0.42	0.38	0.44	0.36	0.43	0.46
Fe/(Fe + Mg)	0.1	0.60	0.36	0.03	0.51	0.22	0.68	0.83
References	Hunt and Salisbury [14], Clark [15]