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

[Additional scientific data in this geographic area]

AK-BR01: Besshi massive sulfide (24b) (Jurassic) , covers 20 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR03: Cyprus massive sulfide (24a) (Jurassic) , covers 20 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR04: Low-sulfide Au-quartz veins (36a) (Cretaceous) , covers 6 % of this area
90%50%10%5%1%
1251015
AK-BR11: Porphyry Cu, BC-Ak type (17) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR12: Plutonic porphyry Au (43) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR13: Placer Au (39a) (Quaternary) , covers 7 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR15: Polymetallic replacement (19a) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR16: Polymetallic vein (22c) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR17: Zn-Pb-Ag veins (Devonian - Mississippian) , covers 0.5 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR18: Cu (Au) skarn (18b) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR19: Zn-Pb skarn (18c) (Cretaceous) , covers 11 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR20: Sandstone hosted Pb-Zn (30a) (Devonian - Mississippian) , covers 0.5 % of this area
The number of undiscovered deposits in this tract was not estimated.