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Opal; Tiger Mining Co. Mine, Nelchina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Opal; Tiger Mining Co. Mine | Mine |
| Nelchina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 32' 13'' North , 144° 38' 45'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chitina | 126 (2017) | 11.2km |
| Kenny Lake | 355 (2011) | 25.8km |
Location: This prospect is located in the cirque at the southwest head of Liberty Creek. It is in the southeast headwall of this cirque, about nine-tenths of a mile north of elevation 5,285. It is at an elevation of 4,400 feet in the NW1/4 section 11, T. 4 S, R. 4 E., of the Copper River Meridian. This prospect is approximately located, perhaps to within one-half mile. It is locality 54 of of Cobb and Matson (1972) and locality 45 of Winkler and others (1981 [OFR 80-892-B]). The location used in this report is that shown by Winkler and others (1981 [OFR 80-892-B]); it is nine-tenths of a mile north of the location shown by Cobb and Matson (1972).
Geology: Widely spaced quartz veins as much as 1 meter wide cut the schist of both the Liberty Creek terrane and Eocene tonalite (Winkler and others, 1981 [OFR 80-892-B]; Winkler and others, 1981 [OFR 80-892-A]). The veins contain arsenopyrite, pyrite, galena, and sphalerite.
Workings: The type of workings have not been reported.
Age: Tertiary; the quartz veins cut tonalite with a K/Ar age of 52.4 +/- 2.6 m. y. (Winkler and others 1981 [OFR 80-892-A]).
Commodities (Major) - Au; (Minor) - Ag, Pb, Zn
Development Status: Yes; small
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:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Galena Formula: PbS |
| ⓘ Native 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 | |||
|---|---|---|---|
| ⓘ | Native 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 |
| ⓘ | 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 |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | VA021 |
|---|
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