Influence of Elevation on Slake Durability Index of Quartz Mica Schist: A Case Study of East Slope of Manjiazhai Open Pit

Table 3

Main mineral components of quartz mica schist at different elevations.

Sample number	Mineral composition and content (%)							Ratio of muscovite to quartz
	Elevation	Quartz	Muscovite	Chlorite	Altered biotite	Sericite	Iron clay montmorillonite
QYD-1	1044	48	45	2	3	1	1	0.94
QYD-2	1080	42	50	2	5	1	Rare	1.19
QYD-3	1120	35	55	3	7	Rare	Rare	1.57
QYD-4	1170	33	57	1	4	3	2	1.73
QYD-5	1230	33	60	2	4	Rare	1	1.82
QYD-6	1280	30	60	1	3	2	4	2.00
QYD-7	1310	26	55	3	8	3	5	2.12