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 | |
McGrath A-3 | 1:63,360 Alaska quadrangle |
McGrath | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Farewell Lake | hydrologic unit |
190304 | hydrologic accounting unit |
Yukon | hydrologic subregion |
Alaska | hydrologic region |
Map symbol | Lithology | Unit name |
---|---|---|
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
SCpl | Sedimentary | Post River Formation and correlative units |
SCpl | Sedimentary | Post River Formation and correlative units |
Stc | Sedimentary | Terra Cotta Mountains Sandstone |
ID | Data type | Description |
---|---|---|
West-Central Alaska | M-D | West-Central Alaska 21360 line km with spacing 9.60 km over parts of AK |
Mc Grath | M/R-D | Mc Grath 2301 line km with spacing 9.60 km over parts of AK |
Farewell | M/R/EM-D | Farewell 7187 line km with spacing 0.40 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-SW19 | Sedex Zn-Pb | |
AK-SW14 | Placer Au | |
AK-SW17 | Cu (Au) skarn | |
AK-SW18 | Zn-Pb skarn | |
AK-SW15 | Polymetallic replacement | |
AK-SW16 | Polymetallic vein |
Domain | Crust type | Region |
---|---|---|
Farewell-McGrath | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
ACG077 | sediment | |
ACG078 | sediment | |
ACG079 | sediment | |
ACG080 | sediment | |
ACG081 | rock | |
ACG082 | rock | |
ACG083 | sediment | |
ACG089 | sediment | |
ACG440 | rock | |
ACG444 | rock | |
ACG449 | rock |
Site name | Development | Commodities |
---|---|---|
Unnamed (on tributary to Middle Fork of Kuskokwim River) | Occurrence | AG CU PB FE MO NI V ZN |
Site | Status | Commodities |
---|---|---|
Unnamed (on tributary to Middle ... | Inactive | Ag;Cu;Pb |
Sample ID | Sample source | Sample notes |
---|---|---|
ACG077 | stream/river | stream |
ACG078 | stream/river | stream |
ACG079 | stream/river | stream |
ACG080 | stream/river | stream |
ACG089 | 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. |