Micro-spectroscopic investigation of selenium-bearing minerals from the Western US Phosphate Resource Area

Table I Description of bulk rock samples used in this study collected by USGS (see Sec. II A)

Sample No.	Weathered classification	Unit within mead peak member	As (mg kg^-1)	Cu (mg kg^-1)	Se (mg kg^-1)	Fe (%)	C (%)
WSPA080C^a	More	Middle waste shale	27.3	62.0	216	1.18	8.01
WSPB131C^a	Less	Phosphorite	9.50	94.0	1070	0.84	12.3
WPSC155C^b	More	Upper waste shale	17.4	41.0	259	2.49	2.74
WPSD098C^b	Less	Middle waste shale	32.9	2.88	193	1.63	19.1
WPSE131C^c	More	Upper waste shale	6.60	157	277	1.76	8.20
WPSH047C^d	Less	Phosphorite	15.6	196	413	0.79	12.3
WPSH053C^d	Less	Phosphorite	23.4	105	708	1.19	12.2
WPSJ006C^d	Least	Footwall siltstone	39.9	111	254	1.57	9.88
WPSJ186C^d	Least	Upper waste	13.1	55.0	445	1.36	4.27

ISSN: 1467-4866