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%
12444
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%
24101010
AK-SC08: Low-sulfide Au-quartz veins (36a) (Cretaceous - Tertiary) , covers < 0.1 % of this area
90%50%10%5%1%
510505050
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%
012410
AK-SC16: Kuroko massive sulfide (28a) (Late Paleozoic) , covers 16 % of this area
90%50%10%5%1%
00111
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%
15777
AK-SC22: Porphyry Cu, BC-Ak type (17) (Jurassic - Cretaceous) , covers 36 % of this area
90%50%10%5%1%
415303030
AK-SC23: Porphyry Cu, BC-Ak type (17) (Paleozoic) , covers 16 % of this area
90%50%10%5%1%
00123
AK-SC24: Plutonic porphyry Au (43) (Cretaceous - Tertiary) , covers < 0.1 % of this area
90%50%10%5%1%
15777
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%
12666
AK-SC32: Cu (Au) skarn (18b) (Jurassic - Cretaceous) , covers 36 % of this area
90%50%10%5%1%
12666
AK-SC33: Cu (Au) skarn (18b) (Paleozoic) , covers 16 % of this area
90%50%10%5%1%
00123