Von Frank - North Occurrence, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Von Frank - North Occurrence | Occurrence |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 32' 42'' North , 154° 21' 10'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
See Von Frank - South prospect (MD036). The Von Frank - North occurrence is on lands selected or owned by Doyon Ltd. For further information, contact Doyon Ltd. at 210 1st Ave, Fairbanks, Alaska 99701.
Location: The Von Frank - North occurrence is situated on a southwest spur of Von Frank Mountain at an elevation of approximately 2,800 feet (853 m) in Section 36, T. 22 S., R. 23 E., of the Kateel River Meridian. The prospect was located on a 1:63,360 scale map by Clautice and others (1993), and is accurate to within 250 feet (76 m).
Geology: Thin stockwork-type arsenopyrite-pyrite veins developed in granodiorite at the west side of Von Frank Mountain intrusion. No dimensions or aerial extent are given (Clautice and others, 1993; DiMarchi and others, 1994) The age of mineralization is Late Cretaceous, based on inferred age of 70.0 Ma Von Frank Mountain pluton (Patton and others, 1980; Moll and others, 1981). In 1992, Clautice and others (1993) collected grab samples of intrusive-hosted mineralization, which contained up to 78 ppb gold, 192 ppm antimony, and 100 ppm cobalt.
Workings: In 1991, Central Alaska Gold Company began a sampling program and encountered auriferous mineralization in a border phase of the Von Frank Mountain intrusion (DiMarchi and others, 1994). In 1992, Clautice and others (1993) collected grab samples of intrusive-hosted mineralization, which contained up to 78 ppb gold, 192 ppm antimony, and 100 ppm cobalt.
Age: The age of mineralization is Late Cretaceous, based on inferred age of 70.0 Ma Von Frank Mountain pluton (Moll and others, 1981).
Alteration: Sericite-quartz-ankerite in intrusion.
Reserves: None.
Commodities (Major) - As, Sb; (Minor) - Au, Co
Development Status: No
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model no. 22c)
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
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| 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 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | MD035 |
|---|
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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