Armstrong Mine

The Armstrong Mine is a iron mine located in Iron county, Utah at an elevation of 6,001 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Armstrong Mine

Commodity

Primary: Iron

Location

State: Utah
County: Iron
District: Iron Springs

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Type: Surface

Ownership

Owner Name: Utah International, Inc.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Year First Production: 1948
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: Sevier Thrust System

Type: L
Description: Granite Mtn. Pluton

Alterations

Alteration Type: L
Alteration Text: Limonitization

Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Jurassic

Analytical Data

Analytical Data: IRON 59.2%

Materials

Ore: Limonite
Ore: Hematite
Ore: Magnetite
Gangue: Quartz
Gangue: Calcite
Gangue: Apatite

Comments

Comment (Commodity): ARMSTRONG ORE IS SOMEWHAT HARDER, MORE MASSIVE, HIGHER IN MAGNETITE, SILICA AND PHOSPHOROUS THAN ADJACENT DEPOSITS ON EAST GRANITE MTN.

Comment (Location): SECTION SUBDIVISIONS SE 1/4 SW 1/4 NW 1/4

Comment (Workings): BENCH MINE, DISTURBED AREA EXTENT 160 ACRES

Comment (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

Comment (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

References

Reference (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.

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

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

Reference (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.

Reference (Deposit): 1947 DIREXPL U.S. BUREAU OF MINES, RI 4076

Reference (Deposit): 1947 RECON MACKIN, UTAH GEOL SOC. GUIDEBOOK #2

Reference (Deposit): 1954 GEOLMAP MACKIN, MINERAL INVESTIGATIONS MAP MF-14

Reference (Deposit): 1967 RECON BLANK AND MACKIN, PROF. PAPER 516-B

Reference (Deposit): 1976 GEOLMAP MACKIN AND ROWLEY, MAP GQ-1295

Reference (Deposit): 1976 RECON BULLOCK, UGMS BULLETIN 88

Reference (Production): STEGEN, R. J. 1979, GEOLOGIST

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