Armstrong Mine

Past Producer in Iron county in Utah, United States with commodity Iron
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10011022
MRDS ID D005164
Record type Site
Current site name Armstrong Mine

Geographic coordinates

Geographic coordinates: -113.23247, 37.71386 (WGS84)
Elevation 1829
Relative position 4,800 FEET EAST OF SWETT PEAK

Site location context

Political divisions (FIPS codes)

Iron(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cedar City NW(quadrangle 1:24,000 scale)

Cedar City(quadrangle 1:100,000 scale)

Cedar City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Escalante Desert(hydrologic unit)

Escalante Desert-Sevier Lake(hydrologic accounting unit)

Escalante Desert-Sevier Lake(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Utah Iron

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 035S 012W 32 Utah

Comments on the location information

  • SECTION SUBDIVISIONS SE 1/4 SW 1/4 NW 1/4

Commodities

Commodity Importance
Iron Primary

Comments on the commodity information

  • ARMSTRONG ORE IS SOMEWHAT HARDER, MORE MASSIVE, HIGHER IN MAGNETITE, SILICA AND PHOSPHOROUS THAN ADJACENT DEPOSITS ON EAST GRANITE MTN.

Materials information

Materials Type of material
Hematite Ore
Limonite Ore
Magnetite Ore
Apatite Gangue
Calcite Gangue
Quartz Gangue

Alteration

  • (Local) Limonitization

Analytical data

Result IRON 59.2%

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Rock unit name Granite Mtn. Pluton
    Rock description Granite Mtn. Pluton
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Homestake Limestone Member Of Carmel Formation
    Rock description Homestake Limestone Member Of Carmel Formation

Nearby scientific data

(1) -113.23247, 37.71386

Economic information

Geologic structures

Type of structure Regional
Structure description Sevier Thrust System
Type of structure Local
Structure description Granite Mtn. Pluton

Ore body information

  • General form TABULAR
    Strike N35 DEG E
    Dip 90 DEG
    Thickness 45.72M
    Length 304.8M
    Width 82.3M
    Depth to top 0M

Controls for ore emplacement

  • Cory-Armstrong Fault, Fracturing, Favorable Limestone Beds

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1948

Mining district

District name Iron Springs

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Utah International, Inc.

Workings at the site

  • Type of workings Surface
    Area 64.752HA

Comments on the workings information

  • BENCH MINE, DISTURBED AREA EXTENT 160 ACRES

Reference information

Bibliographic references

  • Deposit

    MACKIN, J. HOOVER, 1947, SOME STRUCTURAL FEATURES OF THE INTRUSIONS IN THE IRON SPRINGS DISTRICT, UTAH: UTAH GEOL. SOC. GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 2, 62P.

  • Deposit

    YOUNG, W.E., IRON DEPOSITS, IRON COUNTY, UTAH: U.S. BUREAU OF MINES REPORT OF INVESTIGATION 4076, 102P.

  • Deposit

    BULLOCK, KENNETH C., 1976, IRON DEPOSITS OF UTAH: UTAH GEOL. AND MINERAL SURVEY BULLETIN 88, P 23-63.

  • Deposit

    MACKIN, J. HOOVER AND ROWLEY, PETER D., 1976, GEOLOGIC MAP OF THE CEDAR CITY NW QUADRANGLE, IRON COUNTY, UTAH: U.S. GEOLOGICAL SURVEY MAP GQ-1295.

  • Deposit

    1947 DIREXPL U.S. BUREAU OF MINES, RI 4076

  • Deposit

    1947 RECON MACKIN, UTAH GEOL SOC. GUIDEBOOK #2

  • Deposit

    1954 GEOLMAP MACKIN, MINERAL INVESTIGATIONS MAP MF-14

  • Deposit

    1967 RECON BLANK AND MACKIN, PROF. PAPER 516-B

  • Deposit

    1976 GEOLMAP MACKIN AND ROWLEY, MAP GQ-1295

  • Deposit

    1976 RECON BULLOCK, UGMS BULLETIN 88

  • Production

    STEGEN, R. J. 1979, GEOLOGIST

General comments

Subject category Comment text
Deposit ANGULAR BLOCKS OF QUARTZ MONZONITE ARE ASSOCIATED WITH FAULT BRECCIA. THE FAULT BRECCIA IS IMPREGNATED WITH MAGNETITE AND DOUBTLESS SERVED AS A CONDUIT OR FEEDER FOR THE ARMSTRONG ORE BODY. THE LITTLE ALLIE, ARMSTRONG AND LINDSAY ORE BODIES FORM A MORE OR LESS CONTINUOUS ORE ZONE PERHAPS SEPERATED BY FAULTS. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV
Deposit LENS-SHAPED ORE BODY AT SURFACE, NARROWING BELOW SURFACE AND EXTENDING DOWNWARD ALONG FAULT ZONE TO AN UNDETERMINED DEPTH. AT ABOUT 350 FEET THE ORE AVERAGES 40 FEET THICK AND BECOMES A BRECCIA FILLING AND REPLACEMENT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-NOV-1979 Stegan, Ralph J. Bureau of Land Management

Beyond USGS

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

External references