Bertha prospect (Hecla; Red Rose prospects), Nipple Butte, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 17' 26'' North , 132° 24' 3'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hydaburg | 391 (2017) | 28.6km |
| Hollis | 112 (2011) | 33.1km |
| Thorne Bay | 483 (2017) | 44.8km |
Location: This site is located about 5.4 km (3.3 miles) WSW of Nipple Butte. The only primary reference to these claims is by Brooks (1902), who says that they are about 0.8 mile southwest of the Khayyam Mine (CR129). For this record, the site is in the SW¼ section 7, T76S, R86E.
Geology: Brooks (1902), who did not visit these claims, asserts that the deposits are identical to those at the Khayyam Mine (CR129). He describes them as three parallel veins with chalcopyrite and pyrrhotite. No deposits have since been mentioned at or near these claims. Barrie (1984), who studied the nearby Khayyam Mine, also mapped the likely area of these claims, but apparently did not identify any mineral deposits there. Barrie mapped the rocks in the vicinity as felsic to mafic schist, mostly of volcanic origin, that is part of the Late Proterozoic and Cambrian Wales Group.
Workings: No indication of work beyond claims staked prior to 1902. Claims staked intermittently on the Khayyam Mine over the years may have extended to this site.
Age: There is no modern confirmation of a deposit on these claims. If one exists, it is probably similar to the Late Proterozoic or Cambrian deposit at the nearby Khayyam Mine (CR129).
Commodities (Major) - Cu
Development Status: None
Deposit Model: Besshi massive-sulfide deposit? (Cox and Singer, 1986; 24b).
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Pyrrhotite Formula: Fe1-xS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | CR128 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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