Houghton Prospect, Mount jumbo, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 15' 49'' North , 132° 37' 15'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hydaburg | 391 (2017) | 14.5km |
| Hollis | 112 (2011) | 32.6km |
| Klawock | 765 (2017) | 43.9km |
| Thorne Bay | 483 (2017) | 47.6km |
Mindat Locality ID:
198058
Long-form identifier:
mindat:1:2:198058:8
GUID (UUID V4):
da9923ef-7909-4c8a-9f83-8d3655e90f63
The Houghton prospect is on or surrounded by land that has been conveyed to the Sealaska Corporation, who hold the surface and subsurface rights, or the land is under application for transfer to them.
Location: The Houghton prospect is about 0.8 mile north-northwest of Mount Jumbo. It is at an elevation of about 1,650 feet, about 0.3 mile east-southeast of the center of section 22, T. 76 S., R. 84 E.
Geology: The Houghton is an old prospect that was discovered between 1900 and 1903 and was explored by several adits and surface workings prior to 1908 (Wright and Wright, 1905; Wright, 1915; Roppel, 1991). There has been little work since. The deposit consists of small, irregular pods of sulfides in garnet-epidote skarn. The skarn is about 65 feet thick and extends for several hundred feet along a faulted contact between Cretaceous granodiorite and marble of the Wales Group of Late Proterozoic or Cambrian age (Wright and Wright, 1908; Herreid and others, 1978; Maas and others, 1991, 1995). The ore minerals are mainly chalcopyrite, magnetite, and pyrite, with minor sphalerite, pyrrhotite, and native copper. Samples collected by Maas and others (1991, 1995) in the adits contained up to 2,630 parts per billion gold, 465 parts per million silver, and 10.44 percent copper, but the mineralization is restricted to small pods.
Workings: The prospect was explored by three adits, 80, 100, and 200 feet long, and several surface trenches, mostly before 1908; and an aerial tram extended to down to Hetta Inlet. The property has been inactive since the 1920's.
Age: Related to nearby Cretaceous granodiorite.
Alteration: Mineralization associated with garnet-epidote skarn.
Commodities (Major) - Ag, Au, Cu, Zn
Development Status: None
Deposit Model: Cu-Fe skarn (Cox and Singer, 1986; model 18b).
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
7 valid minerals.
Detailed Mineral List:
| β Chalcopyrite Formula: CuFeS2 |
| β Copper Formula: Cu |
| β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| β 'Garnet Group' Formula: X3Z2(SiO4)3 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Pyrite Formula: FeS2 |
| β Pyrrhotite Formula: Fe1-xS |
| β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Copper | 1.AA.05 | Cu |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Sphalerite | 2.CB.05a | ZnS |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrrhotite | 2.CC.10 | Fe1-xS |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| Group 9 - Silicates | |||
| β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Garnet Group | X3Z2(SiO4)3 |
| Al | Aluminium | |
| Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| S | β Pyrrhotite | Fe1-xS |
| S | β Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Pyrite | FeS2 |
| Fe | β Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Copper | Cu |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
Other Databases
| Link to USGS - Alaska: | CR123 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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References
