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Lucky Top Prospect, Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Lucky Top Prospect | Prospect |
| Valdez Creek Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 11' 20'' North , 147° 14' 52'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
This vein is the probable source area for the placer gold and large nuggets in Lucky Gulch (HE207) below it.
Location: This prospect is at an elevation of 500 feet about 0.2 mile northwest of the top of Lucky Hill. It is on the boundary of secs. 7 and 18, T. 20 S., R. 3 E., of the Fairbanks Meridian. The location is accurate to within 500 feet. This site is loc. 17 in Smith (1981) and loc. 52 in Clark and Cobb (1972).
Geology: The country rocks at the Lucky Top prospect is pelitic phyllite containing biotite porphyroblasts, and minor garnet and actinolitic hornblende. The hornblende at a nearby locality has been dated by K-Ar methods at 64.1 Ma (Smith, 1981). The deposit consists of an auriferous, banded, comb-quartz vein in well-defined slate walls. It is accompanied by gouge and slickenslides and contains arsenopyrite and galena. Some small specimens of the quartz run very high in gold (Tuck, 1938). The placer on Lucky Gulch (HE207), located directly downslope from this prospect, is well known for its nuggets and coarse placer gold.
Workings: There has been surface sampling and test pitting with occasional spectacular gold values. An adit was started in 1936 to test down-dip extension below outcrop.
Age: The vein cuts phyllite containing 64.1 Ma actinolitic hornblende.
Commodities (Major) - Au; (Minor) - Pb
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
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
4 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Galena Formula: PbS |
| ⓘ 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 2 - Sulphides and Sulfosalts | |||
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | 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 | ⓘ Galena | PbS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | HE210 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Chulitna-Broad Pass DomainDomain
- Yukon-TananaVolcanic Arc
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