Sentinal Peak

Occurrence in Alaska, United States with commodity Silver

Geologic information

Identification information

Deposit ID 10003358
MRDS ID A106109
Record type Site
Current site name Sentinal Peak

Geographic coordinates

Geographic coordinates: -163.35242, 54.83224 (WGS84)
Relative position Approximate location is on the Alaska Peninsula side of Isanotski Strait, west of Sentinal Peak. Anomaly no. 48 of Christie (1974) and no. 4, of MacKevett and Holloway (1977, p. 11).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary

Materials information

Materials Type of material
Pyrite Gangue
Stilbite Gangue

Alteration

  • (Local) Not described.

Mineral occurrence model information

Model code 105
USGS model code 25a-d
Deposit model name Epithermal vein, generic
Mark3 model number 119

Nearby scientific data

(1) -163.35242, 54.83224

Comments on the geologic information

  • Geologic Description = Christie (1974) briefly examined a 4,000 ft (1.2 km) by 3,000 ft (900 m) color anomaly developed in a basalt-andesite volcanic sequence. Rocks are generally unaltered except where pyrite content is high (about 5 percent); the typical pyrite content in the anomaly is 0.1 to 1 percent. The altered rock forms narrow (+/- 20 ft, 6 m) linear zones. Fracture-controlled pyrite apparently is confined to these altered zones. No mention is made of quartz veining. Minor quartz diorite porphyry and granodiorite were seen in float in the creek on the east side of the ridge but no intrusive rocks were seen in outcrop.
  • Age = Miocene or younger

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Alaska Peninsula

Comments on the workings information

  • Workings / Exploration = Brief reconnaissance geologic mapping and collection of a few soil and silt samples. Copper, molybdenum, zinc, and gold values were not anomalous; silver ranged between 1.3 and 1.9 ppm.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106109
USGS Alaska Resource Data File ARDF FP008

Bibliographic references

  • Deposit

    Christie, J.S., 1974, Aleut-Quintana-Duval 1974 joint venture, final report: Unpublished Quintana Minerals Corporation report, 24 p., 3 appendices, 2 maps. (Report held by the Aleut Corporation, Anchorage, Alaska.)

  • Deposit

    MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous mineral deposits in the western part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-F, 38 p., 1 sheet, scale 1:1,000,000.

  • Deposit

    F.H. Wilson and W.H. White, U.S.G.S. unpublished data, 1992

Comments on the references

  • Primary Reference = Christie, 1974

General comments

Subject category Comment text
Deposit Model Name = Epithermal gold vein?
Deposit Other Comments = Altered area examined by W.H. White (USGS, 1990); no significant mineralization found.

Reporter information

Type Date Name Affiliation Comment
Reporter 06-MAY-1994 G.D. DuBois U.S. Geological Survey
Reporter 06-MAY-1994 F.H. Wilson U.S. Geological Survey