Upper Crooked Creek Occurrence, Council Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Upper Crooked Creek Occurrence | Occurrence |
| Council Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 1' 48'' North , 163° 45' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| White Mountain | 196 (2017) | 42.0km |
Location: This occurrence is on the divide between the headwaters of Virginia Creek, Oxide Creek, Crooked Creek (BN102), and Albion Creek (BN103). It is very approximately located at an elevation of 900 feet; probably located within one mile. This is locality 12 of Cobb (1972; MF 417; 1975; OFR 75-429).
Geology: A gold-bearing lode that consists of quartz veins containing up to 2 ounces Au per ton, occurs on the divide between Goldbottom and Crooked Creeks; it is reported to be near a marble-schist contact (Collier and others, 1908) and to be similar to an occurrence near the mouth of Crooked Creek (BN100; Smith and Eakin, 1911). The occurrence near the mouth of Crooked Creek is a 12-foot wide mineralized zone in schistose limestone (marble) that contains quartz veins and pyrite. Bedrock in the area of this occurrence is metasedimentary schist and marble of a lower Paleozoic assemblage (Till and others, 1986).
Workings: Some small surface prospecting pits are probably present.
Age: Possibly mid-Cretaceous; if gold-bearing lode structures are present here they may be similar in age to some lode gold deposits of southern Seward Peninsula. The southern Seward Peninsula lode gold deposits formed as a result of mid-Cretaceous metamorphism (Apodoca, 1994; Ford, 1993, Ford and Snee, 1996; Goldfarb and others, 1997) that accompanied regional extension (Miller and Hudson, 1991) and crustal melting (Hudson, 1994). This higher temperature metamorphism was superimposed on high pressure/low temperature metamorphic rocks of the region.
Alteration: Quartz veining and possibly disseminated pyrite is present in the metasedimentary host rocks.
Commodities (Major) - Au
Development Status: No
Deposit Model: Gold-bearing quartz veins in schistose marble
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | BN104 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
- Nome ComplexAccretionary Complex
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