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 A-4 | 1:63,360 Alaska quadrangle |
Medfra | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Stony River | hydrologic unit |
190304 | hydrologic accounting unit |
Yukon | hydrologic subregion |
Alaska | hydrologic region |
ID | Data type | Description |
---|---|---|
Medfra '78 | M-D | Medfra '78 10702 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 |
Domain | Crust type | Region |
---|---|---|
Farewell-McGrath | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
CCS061 | sediment | |
CCS215 | rock | metamorphic breccia |
CCS216 | rock | igneous felsic porphyry |
CDF689 | concentrate | panned C3 fraction |
CDJ230 | concentrate | panned C2 fraction |
M137798 | rock | igneous quartz monzonite |
Sample ID | Rock type | Rock name |
---|---|---|
CCS130 | igneous | granite |
CCS215 | unspecified | breccia |
CCS216 | igneous | felsic porphyry |
M137798 | igneous | granodiorite |
Site name | Development | Commodities |
---|---|---|
Crystal Gulch | Past Producer | AG AU BI SN U |
Upper Ruby Creek | Past Producer | AG AU BI TH W |
Nixon Fork - Crystal | Past Producer | AG AU BI CU W |
Crystal Gulch | Past Producer | AU BI |
Site | Status | Commodities |
---|---|---|
Nixon Fork; Mespelt; Crystal; Ga... | Probably inactive | Ag;Au;Cu |
Upper Ruby Creek | Inactive | Ag;Au |
Crystal Gulch | Inactive | Ag;Au |
Deposit name | Deposit type | Location |
---|---|---|
Ruby | unclassified |
Sample ID | Sample source | Sample notes |
---|---|---|
CCS061 | stream/river | stream |
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 |
Western Alaska Range | porphyry copper | Cretaceous porphyry prospects along the Kahiltna Basin-Peninsula terrane boundary |
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. |