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

Mineral assessment tracts in Yuma county, Arizona

[Additional scientific data in this geographic area]

SB03: Skarn Cu (18b) (Mesozoic - Tertiary) , covers 18 % of this area

90%	50%	10%	5%	1%
3	30	50	60	60

SB11: Porphyry Cu (17) (Laramide) , covers 2 % of this area

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

SB17: Porphyry Cu-Au (20c) (Laramide) , covers 58 % of this area

90%	50%	10%	5%	1%
0	1	2	3	4

SB20: Polymetallic replacement + skarn Zn-Pb (19a + 18c) (Mesozoic - Tertiary) , covers 18 % of this area

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

SB24: Distal disseminated Ag-Au (19c) (Mesozoic - Tertiary) , covers 18 % of this area

90%	50%	10%	5%	1%
1	2	5	7	10

SB29: Epithermal vein, Comstock (25c) (Tertiary) , covers 2 % of this area

90%	50%	10%	5%	1%
1	5	7	10	15

SB34: Epithermal vein, quartz-alunite (25e) (Tertiary) , covers 43 % of this area

The number of undiscovered deposits in this tract was not estimated.

SB39: Hot-spring Au-Ag (25a) (Tertiary) , covers 36 % of this area

The number of undiscovered deposits in this tract was not estimated.