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

AK-BR01: Besshi massive sulfide (24b) (Jurassic) , covers 0.7 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR03: Cyprus massive sulfide (24a) (Jurassic) , covers 0.7 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR04: Low-sulfide Au-quartz veins (36a) (Cretaceous) , covers < 0.1 % of this area
90%50%10%5%1%
1251015
AK-BR06: Kipushi Cu-Pb-Zn (32c) (Early Paleozoic) , covers 8 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR09: Mississippi Valley Type (32a & 32b) (Early Paleozoic) , covers 8 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR13: Placer Au (39a) (Quaternary) , covers 44 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR17: Zn-Pb-Ag veins (Devonian - Mississippian) , covers 44 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR20: Sandstone hosted Pb-Zn (30a) (Devonian - Mississippian) , covers 44 % of this area
The number of undiscovered deposits in this tract was not estimated.
AK-BR23: Sedex Zn-Pb (31a) (Mississippian - Pennsylvanian) , covers 10 % of this area
90%50%10%5%1%
2571015