Texas Creek Comstock

The Texas Creek Comstock is a zinc, lead, gold, copper, molybdenum, and silver 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

Name: Texas Creek Comstock  

State:  Alaska

County:  na

Elevation:

Commodity: Zinc, Lead, Gold, Copper, Molybdenum, Silver

Lat, Long: 56.04194, -130.25611

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Satelite image of the Texas Creek Comstock

Texas Creek Comstock MRDS details

Site Name

Primary: Texas Creek Comstock
Secondary: Hyder Lead
Secondary: Texas Comstock
Secondary: Joe Joe
Secondary: Fortuna
Secondary: Alaska-Comstock
Secondary: Jackson-Hummel


Commodity

Primary: Zinc
Primary: Lead
Primary: Gold
Primary: Copper
Primary: Molybdenum
Primary: Silver
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: Chalcopyrite
Ore: Tetrahedrite
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Pyrite
Ore: Molybdenite
Ore: Galena
Gangue: Calcite
Gangue: Chlorite
Gangue: Quartz


Comments

Comment (Geology): Age = Lead-isotope studies of galena from the Hyder Lead prospect (Maas and others, 1995, p. 229-248) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.

Comment (Deposit): Model Name = Polymetallic veins

Comment (Exploration): Status = Inactive

Comment (Geology): Geologic Description = The country rocks in the general area of these prospects include pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mezozoic Hazelton Group; the Triassic Texas Creek Granodiorite, which underlies and locally intrudes the Hazelton; and the Eocene Hyder Quartz Monzonite, which intrudes both the Hazelton and Texas Creek rocks (Smith, 1977; Koch, 1996). ? Buddington (1925, p. 91-93; Cobb, 1978, p. 42-43) described a deposit, called 'Texas Creek Comstock' in his report, as quartz fissure veins up to 11 feet thick in granodiorite, metamorphosed graywacke, and tuff that contain galena, pyrite, chalcopyrite, and molybdenite. Andesite porphyry and aplite dikes cut both the granodiorite and metamorphic rocks. Assays showed 3.6-16.9 oz Ag and a trace to 0.18 oz Au per ton, and as much as 0.61 % Cu, 72.8% Pb, and 2.6% Zn. ? In 1929, Buddington (1929, p. 102-108) described quartz veins in quartz diorite of the Texas Creek Granodiorite and in the metagraywacke and tuff in the roof of the pluton. The veins in the pluton generally are leaner in metallic minerals than those in the overlying bedded rocks. The veins carry galena, pyrite, chalcopyrite, sphalerite, pyrrhotite, and tetrahedrite. Gangue minerals include quartz, barite, calcite, and chlorite. Free gold was found in a piece of quartz(?) float from an unknown source.? Lead-isotope studies of galena from the Hyder Lead prospect (Maas and others, 1995, p. 229-248) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.

Comment (Reference): Primary Reference = Cobb, 1978 (OFR 78-922)

Comment (Workings): Workings / Exploration = Early workings included surface stripping and opencuts.? Early assays showed 3.6-16.9 oz Ag and a trace to 0.18 oz Au per ton, and as much as 0.61 % Cu, 72.8% Pb, and 2.6% Zn.


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): 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): Buddington, A.F., 1925, Mineral investigations in southeastern Alasaka: U.S. Geological Survey Bulletin 773, p. 71-139.

Reference (Deposit): Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-922, 98 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.


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