Hillside Occurrence, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Hillside Occurrence | Occurrence |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 26' 23'' North , 154° 7' 33'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
See Beaver (MD048), Big Gate (MD050), and Bermuda (MD045) Mississippi Valley Type showings.
Location: The Hillside lead occurrence is on a south-facing slope at 1,800 feet (549 m) in elevation near the West Fork of Beaver Creek; it is about 2,500 feet (760 m) southwest of the Beaver prospect in Section 6, T. 24 S., R. 25 E., of the Kateel River Meridian. Location is known within about 250 feet (76 m).
Geology: At the Hillside occurrence, iron-rich gossan occurs in a 100 feet by 50 feet (30 m by 15 m) area that is hosted in solution breccias of the Beaver Creek Dolomite (Schmidt, 1997). Mineralization is believed to occur in roughly the same 'stratigraphic' horizon as the Beaver (MD048), Big Gate (MD050), and Bermuda (MD045) Mississippi Valley Type occurrences, which occur along the south limb of Beaver Creek Syncline. Host units are inferred to be Lower Paleozoic from fossils in dolomite (Blodgett, 1982). Grab samples from surface exploration contain from 0.22 to 2.40 percent lead and up to 2,200 ppm zinc in a 100 feet by 50 feet (30 m by 15 m) area (Schmidt, 1997).
Workings: The Hillside occurrence was discovered by WGM Inc. and Patino Ltd. during exploration for base metals in the 'Reef Ridge district' (Schmidt, 1997). Grab samples from surface exploration contain from 0.22 to 2.40 percent lead with up to 2,200 ppm zinc in a 100 feet by 50 feet (30 m by 15 m) area (Schmidt, 1997).
Age: Host units are inferred to be Lower Paleozoic from fossils in dolomite. (Blodgett, 1982); however, the age of the mineralization is unknown.
Reserves: None.
Commodities (Major) - Pb, Zn; (Minor) - Fe
Development Status: No
Deposit Model: Southeast Missouri Pb-Zn (Cox and Singer, 1986; model no. 32a) or Mississippi V
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| Ca | Calcium | |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MD049 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
- Farewell TerranePassive Margin
USA
- Alaska
- Yukon-Koyukuk Census Area
- McGrath Mining DistrictMining District
- Yukon-Koyukuk Census Area
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