1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Unnamed

Occurrence in Alaska, United States with commodities Lead, Zinc
Map
XML
JSON
KML
C
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Alteration
  8. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10003132
MRDS ID A015664
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -171.0432, 63.52913 (WGS84)
Relative position This site is in the headwaters of an unnamed stream that flows north to a lagoon on the northwest coast of St. Lawrence Island. The mouth of this stream is about 4 1/4 miles southwest of Kangee Camp and 7 miles southeast of Apatiki Camp on the island's northwest coast. The site is about 2 miles upstream of the mouth and is located within 1/2 mile. It is locality 14 of Cobb (1972) and Cobb (1980) summarized relevant references under the name 'Unnamed occurrence'.

Site location context

Political divisions (FIPS codes)

Nome(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Saint Lawrence C-5(quadrangle 1:63,360 scale)

Saint Lawrence NW(quadrangle 1:100,000 scale)

Saint Lawrence(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

St. Lawrence Island(hydrologic unit)

Norton Sound(hydrologic accounting unit)

Northwest(hydrologic subregion)

Alaska(hydrologic region)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Lead Primary
Zinc Critical Primary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Pyrite Gangue

Alteration

  • (Local) Thermal metamorphism of Mississippian limestone has commonly developed coarse marble on St. Lawrence Island (Patton and Csejtey, 1980) but calc-silicate minerals or tactite have not been described.

Mineral occurrence model information

Model code 60
USGS model code 18c
Deposit model name Skarn Zn-Pb
Mark3 model number 22

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
    Stratigraphic age (youngest) Mississippian

Nearby scientific data

(1) -171.0432, 63.52913
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Thermally metamorphosed marble, cut by sulfide stringers containing galena, sphalerite, and pyrite, is exposed in the streambed (Patton and Csejtey, 1971, p. 15). Two samples of sulfide-bearing marble contained (1) 15 ppm silver, 15 ppm copper, greater than 2 % lead, and 200 ppm zinc, and (2) 70 ppm silver, 700 ppm copper, greater than 2 % lead, and greater than 1 % zinc (Patton and Csejtey, 1971, p. C8). The marble is in the contact zone of the Taphook pluton with Mississippian limestone (Patton and Csejtey, 1980). The Taphook pluton is a composite intrusion that in this area is hornblende quartz monzonite. This pluton has not been dated but it is similar to the Sevuokuk pluton on the west coast of St. Lawrence Island that has a K/Ar age of 108 +/- 3.2 Ma (Patton and Csejtey, 1980).
  • Age = Mid-Cretaceous; the marble is in the contact zone of the Taphook pluton with Mississippian limestone (Patton and Csejtey, 1980). This pluton has not been dated but it is similar to the Sevuokuk pluton on the west coast of St. Lawrence Island that has a K/Ar age of 108 +/- 3.2 Ma (Patton and Csejtey, 1980).

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Bering Sea

Comments on the workings information

  • Workings / Exploration = Two samples of sulfide-bearing marble contained (1) 15 ppm silver, 15 ppm copper, greater than 2 % lead, and 200 ppm zinc, and (2) 70 ppm silver, 700 ppm copper, greater than 2 % lead, and greater than 1 % zinc (Patton and Csejtey, 1971, p. C8).

Reference information

Bibliographic references

  • Deposit

    Patton, W.W., Jr., and Csejtey, Bela, Jr., 1971, Preliminary geologic investigations of western St. Lawrence Island, Alaska: U.S. Geological Survey Professional Paper 684-C, p. C1-C15.

  • Deposit

    Patton, W.W., Jr., and Csejtey, Bela, Jr., 1980, Geologic map of St. Lawrence Island, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1203, scale 1:250,000.

  • Deposit

    Cobb, E.H., 1980, Summaries of data and lists of references to metallic and selected nonmetallic mineral deposits in fifteen quadrangles in southwestern and west-central Alaska: U.S. Geological Survey Open-File Report 80-909, 103 p.

  • Deposit

    Cobb, E.H., 1972, Metallic mineral resources map of the Saint Lawrence quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-465, 1 sheet, scale 1:250,000.

Comments on the references

  • Primary Reference = Patton and Csejtey, 1971 (PP 684-C)

General comments

Subject category Comment text
Deposit Model Name = Galena- and sphalerite-bearing veins in marble. Deposit model 18c (?); Zn-Pb skarn deposits

Reporter information

Type Date Name Affiliation Comment
Reporter 10-SEP-1998 Travis L. Hudson Applied Geology

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.