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Unnamed

Occurrence in Alaska, United States with commodities Silver, Lead
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Geologic information

Identification information

Deposit ID 10003570
MRDS ID A106328
Record type Site
Current site name Unnamed

Geographic coordinates

Geographic coordinates: -169.81318, 63.36916 (WGS84)
Relative position This site is on an unnamed south tributary to another unnamed stream that flows northwest and enters Ongoveyuk Lagoon at the mouth of the Ongoveyuk River. The site is the segment of the unnamed south tributary that extends from 3 to 6 miles due south of the mouth of the Ongoveyuk River. It was not included by Cobb (1972; 1980).
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Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Silver Primary
Lead Primary

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

Nearby scientific data

(1) -169.81318, 63.36916
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Comments on the geologic information

  • Geologic Description = Several of the stream sediment samples from this drainage, collected over a length of 1 1/2 miles, contain anomalous metal contents including 0.5 to 1.5 ppm silver and 100 to 500 ppm lead. Barium contents of all the stream sediment samples here are 150 to 500 ppm and their zinc contents are less than 200 to 700 ppm (Patton and Csejtey, 1972). Exposed bedrock in this drainage is a small area of quartz monzonite and Mississippian limestone at its lower end. The cause of the elevated metal values is not apparent but these are the highest and most consistently anomalous silver and lead values in stream sediments from St. Lawrence Island. If these anomalous values reflect mineralization, this mineralization could be stratiform (associated with Mississippian to Triassic sedimentary rocks) or epigenetic (associated with mid-Cretaceous plutonism).
  • Age = If the stream sediment metal concentrations here reflect mineralization, this mineralization could be stratiform and similar in age to that of the nearby sedimentary rocks (Mississippian to Triassic). Alternatively, the potential mineralization could be related to mid-Cretaceous quartz monzonite that intrudes Mississippian limestone at the lower end of this drainage (Patton and Csejtey, 1980).

Economic information

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 = Several of the stream sediment samples from this drainage, collected over a length of 1 1/2 miles, contain anomalous metal contents including 0.5 to 1.5 ppm silver and 100 to 500 ppm lead. Barium contents of all the stream sediment samples here are 150 to 500 ppm and their zinc contents are less than 200 to 700 ppm (Patton and Csejtey, 1972).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS A106328
USGS Alaska Resource Data File ARDF SL020

Bibliographic references

  • Deposit

    Patton, W.W., Jr., and Csejtey, Bela, Jr., 1972, Analyses of stream sediment and rock samples from St. Lawrence Island, Alaska, 1966-1971: U.S. Geological Survey Open-File Report 72-293, 78 p.

  • 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

    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., 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, 1972

General comments

Subject category Comment text
Deposit Model Name = Base metal deposits in sedimentary rocks (synsedimentary or epigenetic). Deposit model 31a (?); sedimentary exhalative Zn-Pb

Reporter information

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