Map symbol | Lithology | Unit name |
---|---|---|
DPxaqm | Metamorphic | Quartz-mica schist of the Brooks Range |
JPztu | Igneous - Plutonic | Ultramafic complexes of western Alaska |
Kqc | Sedimentary | Quartz-pebble conglomerate, west-central Alaska |
ID | Data type | Description |
---|---|---|
Seward-Selawik | M-D | Seward-Selawik 12279 line km with spacing 9.60 km over parts of AK |
Baird Mtns.-Ambler River | M-Dz | Baird Mtns.-Ambler River 14323 line km with spacing 1.20 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-BR04 | Low-sulfide Au-quartz veins | |
AK-BR06 | Kipushi Cu-Pb-Zn | |
AK-BR09 | Mississippi Valley Type | |
AK-BR13 | Placer Au |
Domain | Crust type | Region |
---|---|---|
Koyukuk north | Oceanic arc | Alaska |
Brooks Range | Passive margin | Alaska |
Site name | Development | Commodities |
---|---|---|
Cosmos Creek | Prospect | ASB AU GEM_J |
Site | Status | Commodities |
---|---|---|
Cosmos Creek | Inactive | Asbestos |
Tract name | Deposit type | Geology |
---|---|---|
Yukon-Tanana Upland | porphyry copper | Kluane Arc and Tertiary Kuskokwim Mountains volcanic-plutonic belt (continuation of Canadian Cordilleran continental arc); north of the Denali Fault |
Chukotka | porphyry copper | Early to Late Cretaceous volcanic and intrusive rocks composing island-arc, continental-arc, and collisional magmatic belts associated with the Chukotka microcontinent. |
Pacific Margin | porphyry copper | Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia. |