Howard; Helen Prospect, Hyder Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types | |
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Howard; Helen Prospect | Prospect |
Hyder Mining District | Mining District |
Prince of Wales-Hyder Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
55° 59' 49'' North , 130° 3' 50'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Stewart | 496 (2013) | 8.3km |
Mindat Locality ID:
198062
Long-form identifier:
mindat:1:2:198062:5
GUID (UUID V4):
29236636-2c2e-4270-8032-bc8507392af1
Early reports also refer to prospect as Helen (Cobb and Elliott, 1980, p. 145).
Location: This prospect is at about 600 feet elevation, about 0.55 mile west of Skookum Creek, and about 5.5 miles north-northwest of Hyder. It is in the southwest corner of section 2, T. 68 S., R. 99 E., of the Copper River Meridian. The site corresponds to loc. 11 on plate 2 in Buddington (1929 [B 807]), and to loc. 1 in Elliott and others (1978). The location is accurate within about 0.1 mile. Also see Additional comments.
Geology: The country rocks in the area of this site include: pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or Triassic Hazelton Group; recrystallized granodiorite of the Triassic Texas Creek Granodiorite, which intrudes the Hazelton rocks; quartz monzonite and granodiorite of the Hyder Quartz Monzonite batholith, which intrudes the Hazelton and Texas Creek rocks; and Tertiary lamprophyre dikes, which intrude all of the foregoing rock units (Smith, 1973, l977; Berg and others, 1988). The Howard prospect is in (Texas Creek) granodiorite and consists of a shear zone that contains numerous quartz stringers, some of which contain barite, galena, pyrite, and sphalerite (Buddington, 1929, p. 76; Elliott and others, 1978, loc. 1; Cobb and Elliott, 1980, p. 58). One body of sulfide-bearing quartz is 10 feet long and 12-15 inches wide. Maas and others (1995, p. 254) suggest that sulfide-bearing quartz fissure veins in Texas Creek granodiorite in the Hyder district are Eocene in age. The prospect was explored in the early 1900s by opencuts and stripping.
Workings: Prospect was explored in the early 1900s by opencuts and stripping.
Age: Maas and others (1995, p. 254) suggest that sulfide-bearing quartz fissure veins in Texas Creek granodiorite in the Hyder District are Eocene.
Commodities (Major) - Pb, Zn; (Minor) - Barite
Development Status: No
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
5 valid minerals.
Detailed Mineral List:
β Baryte Formula: BaSO4 |
β Galena Formula: PbS |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Sphalerite | 2.CB.05a | ZnS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Baryte | BaSO4 |
O | β Quartz | SiO2 |
Si | Silicon | |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Baryte | BaSO4 |
S | β Galena | PbS |
S | β Pyrite | FeS2 |
S | β Sphalerite | ZnS |
Fe | Iron | |
Fe | β Pyrite | FeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
Ba | Barium | |
Ba | β Baryte | BaSO4 |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS - Alaska: | KC001 |
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