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  3. Mineral Resource Data System (MRDS)

Little Sitkin Island Sulfur Occurrence

Occurrence in Alaska, United States with commodity Sulfur
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  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 10002324
MRDS ID A013236
Record type Site
Current site name Little Sitkin Island Sulfur Occurrence
Related records 10209622

Geographic coordinates

Geographic coordinates: 178.54685, 51.94798 (WGS84)
Elevation 823
Location accuracy 250(meters)
Relative position ABOUT 250 FT. SOUTH OF CRATER LAKE AT SUMMIT OF SITKIN ISLAND VOLCANO.

Site location context

Political divisions (FIPS codes)

Aleutians West(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rat Islands C-5(quadrangle 1:63,360 scale)

Rat Islands E(quadrangle 1:100,000 scale)

Rat Islands SW(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Western Aleutian Islands(hydrologic unit)

Aleutian Islands(hydrologic accounting unit)

Southwest(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Alaska Maritime National Wildlife Refuge(National Wildlife Refuge)

National Wildlife Refuge FWS(Type of land area)

FWS(Federal land areas administered by FWS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • USGS B 1028-H, P. 205, PLATE 23; USGS OF 80-909, P. 50

Commodities

Commodity Importance
Sulfur Primary

Materials information

Materials Type of material
Sulfur Ore

Alteration

  • (Local) Hydrothermal

Analytical data

Result SAMPLE CONTAINED 95.8%

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite
    Stratigraphic age (youngest) Holocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Nearby scientific data

(1) 178.54685, 51.94798
ListMap

Economic information

Ore body information

  • Thickness 3.05M

Comments on the geologic information

  • RECENT LOW-SILICA DACITE LAVA FLOW FROM BREACHED CRATER HAS BEEN ALTERED TO CLAY BY FUMAROLIC ACTIVITY, WITH SULFUR DEPOSITED.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Non-metallic
Deposit size Medium
Significant No
Discovery year 1951
Discoverer G.L. Snyder, R.A. Robie

Mining district

District name Aleutian Islands

Comments on the reserve resource information

  • SULFUR RESOURCE ESTIMATED AT 200,000 TONS, ASSUMING GRADE OF 95.8% S THROUGH SURFACE ZONE 10 FT. THICK OVER 10 ACRE AREA. ESTIMATE IS PROBABLY TOO LARGE.

Comments on the workings information

  • OCCURRENCE ONLY

Comments on development

  • MAPPED BY USGS IN 1951.

Reference information

Bibliographic references

  • Deposit

    USGS B 1028-H, P. 205-206, PLATE 23 (1959)

  • Deposit

    USGS OF 80-909, P. 50 (1980)

  • Other Database

    BAG-B-1028-H-P-205-PL-23

General comments

Subject category Comment text
Deposit ACTIVE FUMAROLE AREA ON SOUTH SIDE OF BREACHED CRATER CONTAINS MUCH SULFUR IN AREA OF 10 ACRES. SULFUR OCCURS AS VEINS AND VUG LININGS IN CLAY AND MASSIVE MAMMILARY AGGREGATES OF SULFUR CRYSTALS.
Deposit VOLCANO HAS BEEN ACTIVE WITHIN LAST 50 YEARS (AS OF 1959). REMOTE LOCATION AND BAD WEATHER HINDER POSSIBILITIES OF DEVELOPMENT. ; INFO.SRC : 1 PUB LIT
Deposit THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1987 Leonard, Kenneth R. (Huber, Donald F.) U.S. Geological Survey

Beyond USGS

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

Coordinate doesn't match listed state

The coordinates (51.9480, 178.5469) do not appear to fall inside any U.S. state, but this record is listed as being in Alaska, United States.

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.