The Monarch is a copper, zinc, gold, silver, and lead mine located in Alaska.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation:
Commodity: Copper, Zinc, Gold, Silver, Lead
Lat, Long: 56.00694, -130.05560
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Monarch MRDS details
Site Name
Primary: Monarch
Commodity
Primary: Copper
Primary: Zinc
Primary: Gold
Primary: Silver
Primary: Lead
Secondary: Tungsten
Secondary: Barium-Barite
Location
State: Alaska
District: Hyder
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Polymetallic veins
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Barite
Ore: Chalcopyrite
Ore: Galena
Ore: Pyrite
Ore: Scheelite
Ore: Sphalerite
Ore: Tetrahedrite
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Reference): Primary Reference = Buddington, 1929
Comment (Workings): Workings / Exploration = 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).
Comment (Geology): Geologic Description = 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.
Comment (Deposit): Model Name = Polymetallic veins
Comment (Geology): 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.
References
Reference (Deposit): Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p.
Reference (Deposit): Byers, F.M., and Sainsbury, C.L., 1956, Tungsten deposits of the Hyder district, Alaska: U.S. Geological Survey Bulletin 1024-F, p. 123-140.
Reference (Deposit): Smith, J.G., 1973, A Tertiary lamprophyre dike province in southeastern Alaska: Canadian Journal of Earth Sciences, v. 10, p. 408-420.
Reference (Deposit): Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p.
Reference (Deposit): Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360.
Reference (Deposit): Maas, K.M., Bittenbender, P E., and Still, J.C., 1995, Mineral investigations in the Ketchikan mining district, southeastern Alaska: U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Reference (Deposit): Koch, R.D., 1996, Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report 81-728-A, 35 p., 1 sheet, scale 1:250,000.
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