1. Mineral Resources
2. Online Spatial Data
3. National Mineral Resource Assessment 1998

Mineral assessment tracts in Lassen county, California

[Additional scientific data in this geographic area]

GB01: Skarn Cu (18b) (Mesozoic - Tertiary) , covers 4 % of this area

90%	50%	10%	5%	1%
0	1	1	2	2

GB07: Porphyry Cu (17) (Mesozoic - Tertiary) , covers 4 % of this area

90%	50%	10%	5%	1%
0	0	0	1	2

GB14: Polymetallic replacement + skarn Zn-Pb (19a + 18c) (Mesozoic - Tertiary) , covers 4 % of this area

90%	50%	10%	5%	1%
0	3	5	8	8

GB21: Massive sulfide, Sierran kuroko (28a.1) (Mesozoic) , covers 4 % of this area

90%	50%	10%	5%	1%
1	3	6	7	8

GB22: Epithermal vein, Comstock (25c) (Tertiary) , covers 13 % of this area

90%	50%	10%	5%	1%
0	1	2	2	2

GB25: Epithermal vein, quartz-alunite (25e) (Tertiary) , covers 13 % of this area

90%	50%	10%	5%	1%
0	1	2	2	2

GB26: Epithermal vein, quartz-alunite (25e) (Tertiary) , covers < 0.1 % of this area

90%	50%	10%	5%	1%
2	5	9	12	15

PC03: Skarn Cu (18b) (Mesozoic) , covers 1 % of this area

90%	50%	10%	5%	1%
0	0	0	0	1

PC17: Massive sulfide, Sierran kuroko (28a.1) (Jurassic) , covers < 0.1 % of this area

90%	50%	10%	5%	1%
2	13	25	25	25

PC26: Epithermal vein, quartz-adularia (25c + 25d) (Tertiary) , covers 83 % of this area

90%	50%	10%	5%	1%
0	1	2	2	2

PC28: Hot-spring Au-Ag (25a) (Tertiary) , covers 36 % of this area

90%	50%	10%	5%	1%
0	1	3	5	7

PC40: Low-sulfide Au-quartz vein (36a) (Mesozoic) , covers 9 % of this area

90%	50%	10%	5%	1%
2	6	9	12	15