Map symbol | Lithology | Unit name |
---|---|---|
PzPxybg | Metamorphic | Biotite gneiss, marble, schist, quartzite, and amphibolite |
ID | Data type | Description |
---|---|---|
Fortymile mining district | M/EM-D | Fortymile mining district 7648 line km with spacing 0.40 km over parts of AK |
Alaska Regional | M-Dz | Alaska Regional 14484 line km with spacing 16.10 km over parts of AK |
Eagle | M-Dz | Eagle 12713 line km with spacing 1.20 km over parts of AK |
Eagle | M/R-D | Eagle 2035 line km with spacing 9.60 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-EC07 | Low-sulfide Au-quartz veins | |
AK-EC13 | Porphyry Cu, BC-Ak type | |
AK-EC14 | Plutonic porphyry Au | |
AK-EC18 | Polymetallic vein | |
AK-EC15 | Placer Au |
Domain | Crust type | Region |
---|---|---|
Yukon-Tanana upper | Passive margin | Alaska |
Site name | Development | Commodities |
---|---|---|
Fortyfive Pup Gulch | Occurrence | W |
Site | Status | Commodities |
---|---|---|
Fortyfive Pup; Fortyfive Gulch; ... | Active? | Au;W |
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 |
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. |