Cantu

Past Producer in Alaska, United States with commodities Silver, Gold, Copper, Lead, Zinc, Barium-Barite

Geologic information

Identification information

Deposit ID 10000181
MRDS ID A010218
Record type Site
Current site name Cantu
Related records 10258427

Geographic coordinates

Geographic coordinates: -130.06564, 56.07588 (WGS84)
Relative position The Cantu mine is in Section 11 on the east flank of Cantu Mountain about 0.1 mile from the Canadian border. The mine is at an elevation of about 1500 feet and the deposits crop out between elevations of about 1200 and 2180 feet (Buddington, 1929, p. 91-92; Elliott and Koch, 1981, p. 15, loc. 57). The location is accurate within about a tenth of a mile.? Also see Additional Comments field, below.
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Gold Primary
Copper Primary
Lead Primary
Zinc Primary
Barium-Barite Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Barite Gangue
Calcite Gangue
Quartz Gangue

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -130.06564, 56.07588

Comments on the geologic information

  • Geologic Description = The country rocks in the general area of the Cantu mine include the Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Eocene Boundary Granodiorite (Smith, 1977), which intrudes the Hazelton and Texas Creek rocks; and still-younger Tertiary lamprophyre dikes (Smith, 1973), which cut all of the other rocks.? the deposit (Buddington, 1929, p. 43, 91-92) consists of sulfide-bearing quartz-barite-calcite(?) fissure veins in Texas Creek Granodiorite, which is cut by quartz porphyry and lamprophyre dikes. The veins, ranging from a few inches to three feet thick, as well as smaller veinlets, carry galena, sphalerite, and tetrahedrite, generally sparse pyrite and chalcopyrite, and, in places, barite equal in amount to the quartz. ? Maas and others' (1995, p. 258) description of the Cantu deposit differs from Buddington's in that they interpret the hostrock as Hazelton greenstone, not Texas Creek Granodiorite.? Assays of a carefully selected 20-ton shipment sent to a smelter in 1925 showed 0.175-0.30 oz Au and 13.80-31.05 oz Ag per ton, 37.20-44.1% Pb, and 5.6-12.2% Zn. Assays of grab samples of sorted ore were generally comparable in metal content, except for one sample rich in tetrahedrite that contained 61.2 oz Ag per ton. A grab sample from another vein 30-35 feet thick that contained streaks and disseminations of pyrite gave an assay of 0.8 oz Au and 1.202 oz Ag per ton.? Lead-isotope studies of galena from the Cantu deposit (Maas and others, 1995, p. 254) indicate that the deposit is Jurassic in age, contemporaneous, at least in part, with island-arc volcanism in Hazelton time (Alldrick, 1993).
  • Age = Lead-isotope studies of galena from the Cantu deposit (Maas and others, 1995, p. 254) indicate that the deposit is Jurassic in age, contemporaneous, at least in part, with island-arc volcanism in Hazelton time (Alldrick, 1993).

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Hyder

Comments on the production information

  • Production Notes = A 20-ton test shipment was sent to a smelter in 1925

Comments on the workings information

  • Workings / Exploration = Presumably fairly extensive surface and underground workings. Maas and others (1995, p. 258) report four adits ranging from 10-40 feet long.? Assays of a carefully selected 20-ton shipment sent to a smelter in 1925 showed 0.175-0.30 oz Au and 13.80-31.05 oz Ag per ton, 37.20-44.1% Pb, and 5.6-12.2% Zn. Assays of grab samples of sorted ore were generally comparable in metal content, except for one sample rich in tetrahedrite that contained 61.2 oz Ag per ton. A grab sample from another vein 30-35 feet thick that contained streaks and disseminations of pyrite gave an assay of 0.8 oz Au and 1.202 oz Ag per ton.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A010218
USGS Alaska Resource Data File ARDF BC057

Bibliographic references

  • 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.

  • Deposit

    Smith, J.G., 1973, A Tertiary lamprophyre dike province in southeastern Alaska: Canadian Journal of Earth Sciences, v. 10, p. 408-420.

  • 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.

  • 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.

  • Deposit

    Alldrick, D.J., 1993, Geology and metallogeny of the Stewart mining camp, northwestern British Columbia: British Columbia Department of Mines and Petroleum Resources Bulletin 85, 105 p., 2 plates.

  • 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.

  • 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.

  • Deposit

    U.S. Bureau of Mines, 1979, Claim map 118: Mines and prospects of the Bradfield Canal quadrangle, Alaska: U.S. Bureau of Mines Open-File Report 20-73, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Buddington, 1929

General comments

Subject category Comment text
Deposit Model Name = Polymetallic veins
Deposit Other Comments = Claims were originally located in 1925. The Cantu group, restaked in 1949 and 1966, probably covered an area somewhat different from the original Cantu claims (U.S. Bureau of Mines, 1979).

Reporter information

Type Date Name Affiliation Comment
Reporter 17-MAY-1998 H. C. Berg U.S. Geological Survey