Dieter

Site Name

Primary: Dieter
Secondary: Cape Mountain

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Commodity

Primary: Tin

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Location

State: Alaska
District: Port Clarence

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Land Status

Not available

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Holdings

Not available

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Workings

Not available

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Ownership

Not available

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

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Physiography

Not available

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Mineral Deposit Model

Model Name: Sn veins

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Orebody

Not available

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Structure

Not available

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Alterations

Alteration Text: Alteration has not been described.

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Rocks

Not available

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Analytical Data

Not available

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Materials

Ore: Cassiterite
Gangue: Quartz

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Comments

Comment (Workings): Workings / Exploration = An adit was driven 418 feet S 72 W from a portal at 1700 feet elevation on the north side of the summit to Cape Mountain. Other surface prospect pits and short shafts were dug in the area.

Comment (Reference): Primary Reference = Steidtmann and Cathcart, 1922; Mulligan, 1966

Comment (Geology): Age = Late Cretaceous; cassiterite and related mineralization in this area is interpretated to be linked to the evolution of the Cape Mountain granite which has been determined to be 78.8 +/- 2.9 my old by the K/Ar method (Hudson and Arth, 1983, p. 769). .

Comment (Deposit): Model Name = Cassiterite-quartz vein in granite (Cox and Singer, 1986; model 15b?)

Comment (Geology): Geologic Description = The Cape Mountain (Dieter) prospect is a 418 foot-long adit, now caved, driven S 72 W to intersect an area of quartz veining in the Late Cretaceous (78.8 +/- 2.9 my; Hudson and Arth, 1983, p. 769) Cape Mountain biotite granite. The prospect is near the summit of Cape Mountain which is a roof pendant of marble and interlayered schist (Sainsbury, 1972). Steidtmann and Cathcart (1922, p. 99) reported finding cassiterite-bearing quartz vein material on the adit dump but a later effort by Mulligan (1966, p. 33) was unsuccessful in duplicating this result. The area of the prospect is in a part of the Cape Mountain biotite granite (Hudson and Arth, 1983) that has characteristics of a precursor phase rather than a mineralizing phase (Hudson and Reed, 1997, figure 3).

Comment (Exploration): Status = Inactive

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References

Reference (Deposit): Harrington, G.L., 1919, Graphite mining in Seward Peninsula: U.S. Geological Survey Bulletin 692-G, p. 363-367.

Reference (Deposit): Harrington, G.L., 1919, Tin mining in Seward Peninsula: U.S. Geological Survey Bulletin 692-G, p. 353-361.

Reference (Deposit): Hudson, T.L., 1984, Tin systems of Seward Peninsula, Alaska: Anchorage, Anaconda Minerals Company internal report, 51 p. (Report held by Cook Inlet Region Inc., Anchorage, Alaska)

Reference (Deposit): Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Teller quadrangle, Alaska; Supplement to Open-File Report 75-587; Part A, Summaries of data to January 1, 1980: U.S. Geological Survey Open-File Report 81-364-A, 25 p.

Reference (Deposit): Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Teller quadrangle, Alaska; Supplement to Open-File Report 75-587; Part B, Lists of references to January 1, 1980: U.S. Geological Survey Open-File Report 81-364-B, 25 p.

Reference (Deposit): Collier, A.J., 1904, Tin deposits of the York region, Alaska: U.S. Geological Survey Bulletin 229, 61 p.

Reference (Deposit): Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Teller quadrangle, Alaska: U.S. Geological Survey Open-File Report 75-587, 130 p.

Reference (Deposit): Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Teller quadrangle, Alaska, supplement to Open-File Report 75-587; Part A, Summaries of data to January 1, 1980: U. S. Geological Survey Open-File Report 81-364-A, 25 p.

Reference (Deposit): Cobb, E.H., and Sainsbury, C.L., 1972, Metallic mineral resource map of the Teller quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-426, 1 sheet, scale 1:250,000.

Reference (Deposit): Sainsbury, C.L., 1972, Geologic map of the Teller quadrangle, Seward Peninsula, Alaska: U.S. Geological Survey Map I-685, 4 p., 1 sheet, scale 1:250,000.

Reference (Deposit): Mulligan, J.J., 1966, Tin-lode investigations, Cape Mountain area, Seward Peninsula, Alaska; with a section on petrography by W. L. Gnagy: U.S. Bureau of Mines Report of Investigations 6737, 43 p.

Reference (Deposit): Heide, H.E., Wright, W.S., and Sanford, R.S., 1946, Exploration of Cape Mountain lode-tin deposits, Seward Peninsula, Alaska: U.S. Bureau of Mines Report of Investigations 3978, 16 p.

Reference (Deposit): Hess, F.L., 1906, The York tin region, in Brooks, A.H., and others, Report on progress of investigations of mineral resources in Alaska, 1905: U.S. Geological Survey Bulletin 284, p. 145-157.

Reference (Deposit): Knopf, Adolph, 1908, Geology of the Seward Peninsula tin deposits, Alaska: U.S. Geological Survey Bulletin 358, 71 p.

Reference (Deposit): Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Teller quadrangle, Alaska, supplement to Open-File Report 75-587; Part B, Lists of references to January 1, 1980: U. S. Geological Survey Open-File Report 81-364-B, 25 p.

Reference (Deposit): Hudson, T.L., and Arth, J. G., 1983, Tin-granites of Seward Peninsula, Alaska: Geological Society of America Bulletin, v. 94, p. 768-790.

Reference (Deposit): Steidtmann, Edward, and Cathcart, S. H., 1922, Geology of the York tin deposits, Alaska: U.S. Geological Survey Bulletin 733, 130 p.

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