Unnamed (near Ella Point)

Occurrence in Alaska, United States with commodity Zinc

Geologic information

Identification information

Deposit ID 10001569
MRDS ID A012318
Record type Site
Current site name Unnamed (near Ella Point)

Geographic coordinates

Geographic coordinates: -130.9837, 55.49669 (WGS84)
Relative position The approximate location of this occurrence is on the west shore of Behm Canal near Ella Point. The site is in section 33, T. 73 S., R. 95 E., of the Copper River Meridian. It corresponds to loc. 51 in Elliott and others (1978). The location probably is accurate within about 0.5 mile.
(click for info)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Zinc Primary

Materials information

Materials Type of material
Pyrite Ore
Sphalerite Ore

Mineral occurrence model information

Model code 208
USGS model code 31a
BC deposit profile E14
Deposit model name Sedimentary exhalative Zn-Pb
Mark3 model number 13

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -130.9837, 55.49669

Comments on the geologic information

  • Geologic Description = The country rocks near Ella Point consist of pelitic and quartzofeldspathic paragneiss that is intruded by an elongate stock of Cretaceous leucocratic granodiorite and quartz monzonite (Berg and others, 1988). The paragneiss represents marine argillaceous and clastic strata that underwent regional high-grade regional metamorphism in Cretaceous or Tertiary time. The premetamorphic age of the strata is uncertain. Most are probably Paleozoic, but some may be as young as Mesozoic and some as old as Precambrian (Berg and others, 1988; Gehrels and others, 1990; Crawford and others, in press). ? According to Berg and Cobb (1967, p. 182), 'A zinc-bearing lode that may be similar to the one at Moth Bay [KC086] is on the west shore of Bradfield Canal near Ella Point, where pyrite and sphalerite reportedly replace sericitic schist.' No other information about this occurrence has been made public.

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Mining district

District name Ketchikan

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A012318
USGS Alaska Resource Data File ARDF KC052

Bibliographic references

  • Deposit

    Berg, H.C., and Cobb, E.H., 1967, Metalliferous Lode Deposits of Alaska. U.S. Geological Survey Bulletin 1246, 254 p.

  • Deposit

    Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.

  • Deposit

    Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.

  • Deposit

    Gehrels, G.E., McClelland, W.C., Samson, S.D., Patchett, P.J., and Jackson, J.L., 1990, Ancient continental margin assemblage in the northern Coast Mountains, southeast Alaska and northwest Canada: Geology, v. 18, p. 208-211.

  • Deposit

    Crawford, M.L., Crawford, W.A., and Gehrels, G.E., 2000, Terrane assembly and structural relationships in the eastern Prince Rupert quadrangle, British Columbia, in H.H. Stowell and W.C.McClelland, eds., Tectonics of the Coast Mountains, southeastern Alaska and British Columbia: Boulder, Colorado, Geological Society of America Special Paper 343, p. 1-21.?

Comments on the references

  • Primary Reference = Berg and Cobb, 1967

General comments

Subject category Comment text
Deposit Model Name = Sedimentary exhalative Zn-Pb? (Cox and Singer, 1986; model 31a)
Deposit Other Comments = Site is in Misty Fiords National Monument Wilderness.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1999 H.C. Berg U.S. Geological Survey