Unnamed Prospect (ARDF - NB009; northwest head of Caribou Creek), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 37' 14'' North , 143° 27' 0'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mentasta Lake | 112 (2011) | 37.1km |
The prospect is in the Wrangell-St. Elias National Preserve.
Location: This prospect is in the headwaters of an unnamed north tributary to Caribou Creek. It is an an elevation of about 4,800 feet, 3,200 feet northwest of elevation 5620, and 3,000 feet south-southeast of elevation 6240. The site is in the NE1/4 of section 25, T. 10 N., R.10 E. of the Copper River Meridian. This is locality 1 of Richter and Schmoll (1973), locality 5 of Richter and others (1975), and National Park Service locality WRST-2 (unpublished data). It is located to within a few hundred feet.
Geology: Gold occurs in 1/4- to 2 -inch-thick stringers of quartz, calcite, pyrite, galena, and sphalerite that are localized in a zone 6 to 12 inches wide that cuts dioritized volcanic rocks. An adit was driven N 65 E to crosscut the zone which is near an 8-foot-wide trachyte dike that strikes N 55 W and dips 45 NE (Moffit, 1954). The volcanic rocks are part of the Pennsylvanian-Permian Tetelna Volcanics that are intruded by a diorite gneiss complex within 500 feet of the prospect (Matson and Richter, 1971 [OFR 71-204]; Richter and Schmoll, 1973; Richter, 1976). K/Ar ages from the diorite complex indicate that it is Early Jurassic or older (Richter. Lanphere, and Matson, 1975).
Workings: An adit was driven N 65 E to crosscut the mineralized zone. It was caved by the early 1950s (Moffit, 1954).
Age: Early Jurassic or younger? This prospect is in the border zone of a large diorite complex that is Early Jurassic or older (Richter, Lanphere, and Matson, 1975).
Commodities (Major) - Au, Pb, Zn
Development Status: Undetermined.
Deposit Model: Polymetallic veins (Cox and Singer, 1986; model 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
6 valid minerals.
Detailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Galena Formula: PbS |
| ⓘ Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Au | Gold | |
| Au | ⓘ Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | NB009 |
|---|
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