Table 2.

Abundances of the Minerals Used in Laboratory Mixtures and Corresponding Band Parameters

Phyllosilicate (wt.%)	Pyroxene + plagioclase (wt.%)	Plagioclase (wt.%)	Pyroxene (wt.%)	Hematite (wt.%)	Band minimum (nm)	867 nm band depth	527 nm band depth	Similar Mars drill target	Hematite grain size (μm)
0	100	77.5	22.5	0	1,019	−0.036	−0.039		N/A
0	95	75	20	5	861	0.046	0.077		76–106
8	87	71	16	5	863	0.068	0.105	Oudam	76–106
23	65	57	8	5 a	897	0.0243	0.176		<20
					877	0.0172	0.183		20–45
					925	0.0046	0.106		45–90
					933	0.0123	0.044		90–150
25	70	61	9	5	869	0.073	0.102	Stoer	76–106
25	75	66	9	0	985	−0.017	−0.035		N/A
28	60	51	9	12	866	0.139	0.228	Duluth	76–106
56	39	31	8	5	876	0.101	0.142	Sebina	76–106
95	0	0	0	5	882	0.166	0.223		76–106
100	0	0	0	0	918	0.053	−0.080		N/A

Note. Some mixture abundances were based on actual CheMin results from drill targets (Bristow et al., 2018; Rampe et al., 2020). Other mixtures were created to provide nearly end‐member examples.

^aThis mixture has 7 wt.% iron‐bearing glass as a result of using the natural sample HWMK20.