Counties, states, countries, continents, or oceans | |
Yukon-Koyukuk | Census area |
Alaska | state |
United States | country |
North America | continent |
Land | continent |
Map quadrangles, from USGS or Canadian NTS | |
Medfra D-1 | 1:63,360 Alaska quadrangle |
Medfra | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Nowitna River | hydrologic unit |
190407 | hydrologic accounting unit |
Southwest Alaska | hydrologic subregion |
Alaska | hydrologic region |
Map symbol | Lithology | Unit name |
---|---|---|
TKv | Igneous - Volcanic | Volcanic rocks in southern Alaska |
ID | Data type | Description |
---|---|---|
West-Central Alaska | M-D | West-Central Alaska 21360 line km with spacing 9.60 km over parts of AK |
Medfra '78 | M-D | Medfra '78 10702 line km with spacing 1.60 km over parts of AK |
Four Corners | M/R-D | Four Corners 1107 line km with spacing 1.60 km over parts of AK |
Medfra | M/R-D | Medfra 2245 line km with spacing 9.60 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-WC22 | Polymetallic vein | |
AK-WC17 | Placer Au | |
AK-WC07 | Epithermal vein, hot spring Au | |
AK-WC10 | Low-sulfide Au-quartz veins | |
AK-WC03 | Besshi massive sulfide |
Domain | Crust type | Region |
---|---|---|
Farewell-McGrath | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
CDS150 | rock | igneous felsic |
D216274 | rock | igneous rhyolite porphyry |
M143347 | rock | igneous rhyolite |
M143363 | rock | igneous rhyolite |
Sample ID | Rock type | Rock name |
---|---|---|
CDS150 | igneous | felsic |
D216274 | igneous | rhyolite porphyry |
M143347 | igneous | rhyolite |
M143363 | igneous | rhyolite |
Site name | Development | Commodities |
---|---|---|
Unnamed | Occurrence | NB TH U REE W REE_CE |
Site | Status | Commodities |
---|---|---|
Unnamed | Inactive | Nb;Th;U |
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. |