Monarch Prospect, Hyder Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Monarch 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):
56° 0' 24'' North , 130° 3' 21'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Stewart | 496 (2013) | 9.0km |
Mindat Locality ID:
198942
Long-form identifier:
mindat:1:2:198942:0
GUID (UUID V4):
feb1541c-8491-4a00-b350-89d92a710b00
Location: The Monarch prospect, in Section 2 at an elevation of about 2350 feet, is on a west-facing mountainside about 0.6 mile east-northeast of the Riverside mine adit (Elliott and Koch, 1981, p. 19, loc. 79). The location is accurate within about 0.2 mile.
Geology: The country rocks in the area of the Monarch prospect are the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic (greenstone) metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Eocene Hyder Quartz Monzonite, which intrudes the Hazelton and Texas Creek rocks; and still-younger Tertiary lamprophyre dikes, which cut all the other rocks (Smith, 1973, 1977; Koch, 1996). The deposit (Buddington, 1929, p. 74-75; Byers and Sainsbury, 1956, p. 139) consists of quartz-barite fissure veins in granodiorite that contain local shoots of galena, pyrite, tetrahedrite, sphalerite, and chalcopyrite, and sparse grains of scheelite. Samples of one vein assayed about 1-1.5 oz Au per ton, and a specimen of tetrahedrite reportedly contained 266 oz of Ag and about 1.0 oz of Au per ton. Barite is locally an abundant constituent of the veins. Byers and Sainsbury (1956, p. 139) report that a quartz veinlet four inches thick and exposed for most of the length of a 30-foot drift contains an estimated 0.5-3.0% WO3. The veinlet may be part of the Olympia Extension (BC078) vein that crops out 1000 feet to the southeast. Maas and others (1995, p. 254) suggest that the age of the Monarch deposit is Eocene, based on similarities in mineralogy, structural setting, and hostrock, to lead-isotope-dated Eocene deposits nearby in the Hyder district (see, for example, BC086). If so, the deposit is contemporaneous with emplacement of the Hyder Quartz Monzonite.
Workings: The deposit was explored in the 1920's by opencuts, stripping, and a 30-foot adit. Early assays of samples of one vein showed about 1-1.5 oz Au per ton, and a specimen of tetrahedrite reportedly contained 266 oz of Ag and about 1.5 oz Au per ton. A quartz veinlet four inches thick and exposed for most of the length of a 30-foot drift contains an estimated 0.5-3.0% WO3 (Byers and Sainsbury, 1956).
Age: Maas and others (1995, p. 254) suggest that the age of the Monarch deposit is Eocene, based on similarities in mineralogy, structural setting, and hostrock, to lead-isotope-dated Eocene deposits nearby in the Hyder district (see, for example, BC086). If so, the deposit is contemporaneous with emplacement of the Hyder Quartz Monzonite.
Commodities (Major) - Ag, Au, Cu, Pb, Zn; (Minor) - W; barite
Development Status: None
Deposit Model: Polymetallic veins
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 Baryte Formula: BaSO4 |
| β Chalcopyrite Formula: CuFeS2 |
| β Galena Formula: PbS |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
| β Scheelite Formula: Ca(WO4) |
| β Sphalerite Formula: ZnS |
| β 'Tetrahedrite Subgroup' Formula: Cu6(Cu4C2+2)Sb4S12S |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| β | Sphalerite | 2.CB.05a | ZnS |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Galena | 2.CD.10 | PbS |
| β | Pyrite | 2.EB.05a | FeS2 |
| β | 'Tetrahedrite Subgroup' | 2.GB.05 | Cu6(Cu4C2+2)Sb4S12S |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Baryte | 7.AD.35 | BaSO4 |
| β | Scheelite | 7.GA.05 | Ca(WO4) |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | β Baryte | BaSO4 |
| O | β Quartz | SiO2 |
| O | β Scheelite | Ca(WO4) |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Baryte | BaSO4 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Galena | PbS |
| S | β Pyrite | FeS2 |
| S | β Sphalerite | ZnS |
| S | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Ca | Calcium | |
| Ca | β Scheelite | Ca(WO4) |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Zn | Zinc | |
| Zn | β Sphalerite | ZnS |
| Sb | Antimony | |
| Sb | β Tetrahedrite Subgroup | Cu6(Cu4C22+)Sb4S12S |
| Ba | Barium | |
| Ba | β Baryte | BaSO4 |
| W | Tungsten | |
| W | β Scheelite | Ca(WO4) |
| Pb | Lead | |
| Pb | β Galena | PbS |
Other Databases
| Link to USGS - Alaska: | BC079 |
|---|
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References
