Counties, states, countries, continents, or oceans | |
Nome | Census area |
Alaska | state |
United States | country |
North America | continent |
Land | continent |
Map quadrangles, from USGS or Canadian NTS | |
Nome D-1 | 1:63,360 Alaska quadrangle |
Nome | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Imuruk Basin | hydrologic unit |
190501 | hydrologic accounting unit |
South Central Alaska | hydrologic subregion |
Alaska | hydrologic region |
Map symbol | Lithology | Unit name |
---|---|---|
PzPxkg | Metamorphic | High-grade metamorphic rocks of the Seward Peninsula |
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
Zgns | Metamorphic | Orthogneiss of the Seward Peninsula |
ID | Data type | Description |
---|---|---|
Seward Peninsula | M-D | Seward Peninsula 24944 line km with spacing 0.40 km over parts of AK |
Cady | M-D | Cady -9999 line km with spacing 0.40 km over parts of AK |
Nome | M/R-D | Nome 346 line km with spacing 9.60 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-WC17 | Placer Au | |
AK-WC01 | Besshi massive sulfide | |
AK-WC23 | Cu (Au) skarn | |
AK-WC18 | Polymetallic replacement | |
AK-WC20 | Polymetallic vein | |
AK-WC25 | Zn-Pb skarn | |
AK-WC27 | Sedex Zn-Pb |
Domain | Crust type | Region |
---|---|---|
Brooks-Seward | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
AHI432 | sediment | |
BDN557 | rock | metamorphic unspecified |
M114163 | rock | metamorphic skarn |
M124831 | sediment | |
M127543 | sediment |
Site name | Development | Commodities |
---|---|---|
Thompson Creek Placer | Occurrence | W |
Thompson Creek | Occurrence | W |
Unnamed (near Grand Central River) | Occurrence | BE TH U |
Thompson Creek | Occurrence | W |
Thompson Creek | Occurrence | W |
Site | Status | Commodities |
---|---|---|
Thompson Creek | Inactive | W |
Unnamed (near Grand Central Rive... | Probably inactive | Be;Th;U |
Sample ID | Sample source | Sample notes |
---|---|---|
M124831 | float/colluvium/talus | rock aggregate: biotite gneiss, schist, calc silic;; talus/colluvium |
M127543 | 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 |
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. |