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

Mineral assessment tracts in Gulkana (1:250,000 Alaska quadrangle in USGS Quadrangles)

[Additional scientific data in this geographic area]

AK-SC01: Basaltic Cu/Kennecott Cu (23) (Cretaceous) , covers 31 % of this area

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

AK-SC03: Besshi massive sulfide (24b) (Late Triassic) , covers 23 % of this area

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

AK-SC05: Cu-Ag quartz veins (Cretaceous) , covers 31 % of this area

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

AK-SC07: Au-Sb veins (36c) (Cretaceous - Tertiary) , covers < 0.1 % of this area

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

AK-SC08: Low-sulfide Au-quartz veins (36a) (Cretaceous - Tertiary) , covers < 0.1 % of this area

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

AK-SC09: Low-sulfide Au-quartz veins (36a) (Cretaceous) , covers 31 % of this area

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

AK-SC15: Sierran Kuroko mass. sulf. (28a.1) (Jurassic) , covers 3 % of this area

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

AK-SC16: Kuroko massive sulfide (28a) (Late Paleozoic) , covers 16 % of this area

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

AK-SC18: Synorogenic-synvolcanic Ni-Cu (7a) (Late Triassic) , covers 31 % of this area

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

AK-SC20: Porphyry Cu, BC-Ak type (17) (Cretaceous - Tertiary) , covers < 0.1 % of this area

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

AK-SC22: Porphyry Cu, BC-Ak type (17) (Jurassic - Cretaceous) , covers 36 % of this area

90%	50%	10%	5%	1%
4	15	30	30	30

AK-SC23: Porphyry Cu, BC-Ak type (17) (Paleozoic) , covers 16 % of this area

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

AK-SC24: Plutonic porphyry Au (43) (Cretaceous - Tertiary) , covers < 0.1 % of this area

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

AK-SC25: Placer Au (39a) (Cenozoic) , covers 89 % of this area

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

AK-SC27: Polymetallic vein (22c) (Mesozoic - Tertiary) , covers < 0.1 % of this area

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

AK-SC29: Polymetallic vein (22c) (Cenozoic) , covers 15 % of this area

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

AK-SC31: Cu (Au) skarn (18b) (Cretaceous - Tertiary) , covers 15 % of this area

90%	50%	10%	5%	1%
1	2	6	6	6

AK-SC32: Cu (Au) skarn (18b) (Jurassic - Cretaceous) , covers 36 % of this area

90%	50%	10%	5%	1%
1	2	6	6	6

AK-SC33: Cu (Au) skarn (18b) (Paleozoic) , covers 16 % of this area

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