Unnamed Occurrence (ARDF - NB056; west of upper Cross Creek), Chisana Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - NB056; west of upper Cross Creek) | - not defined - |
| Chisana Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 4' 14'' North , 142° 34' 55'' West
Latitude & Longitude (decimal):
Köppen climate type:
The occurrence is in the Wrangell-St. Elias National Preserve.
Location: This occurrence is in a small unnamed drainage on the northwest side of the valley of Cross Creek . It is at an elevation of about 6,200 feet, 1,500 feet southeast of elevation 7115, and 4,500 feet west of Cross Creek. The occurrence is about 0.1 mile northeast of the center of section 1, T. 3 N., R. 15 E. of the Copper River Meridian. This is locality 17 of Richter (1973), locality 35 of Richter and others (1975), and National Park Service locality WRST-50 (unpublished data). Cobb and Richter (1980 [OFR 80-927]) included this locality as an 'Unnamed occurrence'. It is located to within a few hundred feet.
Geology: This occurrence is a quartz vein that contains minor pyrite, chalcopyrite, galena, and sphalerite; it cuts hornfelsed volcanic country rock that has disseminated galena and sphalerite (Richter and Matson, 1970 [OFR 70-276]; Richter and others, 1975). A sample of a 20-foot-long quartz vein contained 0.8 parts per million (ppm) gold and a sample of volcanic hornfels with disseminated galena and sphalerite contained 0.9 ppm gold, 300 ppm copper, 3,000 ppm lead, and more than 10,000 ppm zinc (Richter and Matson, 1970 [OFR 70-276]). The volcanic host rocks are part of the upper Paleozoic, Tetelna Volcanics that form a roof pendant over a Tertiary porphyry complex (Richter, 1973, Richter, 1976).
Workings: Probably only surface examination.
Age: Tertiary? Mineralization is in a large metavolcanic roof pendant in a Tertiary porphyry complex (Richter, 1973; 1976).
Commodities (Major) - Au, Cu, Pb, Zn
Development Status: None
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:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ 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 |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | NB056 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Wrangell MountainsMountain Range
North America PlateTectonic Plate
- Wrangellia DomainVolcanic Arc
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