Comstock Mine

The Comstock Mine is a iron mine located in Iron county, Utah at an elevation of 6,601 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: Comstock Mine

Commodity

Primary: Iron

Location

State: Utah
County: Iron
District: Pinto Iron

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: C. F. And I. Steel Corp.

Owner Name: Utah International, Inc.

Production

Year: 1968
Time Period: 1956 - 1968

Deposit

Record Type: Site
Operation Category: Producer
Deposit Type: Replacement
Operation Type: Unknown
Year First Production: 1956
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: Sevier Thrust System

Type: L
Description: Iron Mtn. Intrusion, Faulting

Alterations

Alteration Type: L
Alteration Text: Limonitization

Rocks

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
Age Young: Late Jurassic

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

Analytical Data

Analytical Data: IRON 54%

Materials

Ore: Magnetite
Ore: Hematite
Gangue: Calcite

Comments

Comment (Deposit): ORE BODY IS A HUGE ROOF PENDANT REPLACEMENT DEPOSIT IN HOMESTAKE LIMESTONE. IT IS CUT BY SEVERAL FAULTS OF SMALL TO LARGE DISPLACEMENTS, PRODUCING A JUXTAPOSITION OF SEDIMENTARY BLOCKS

Comment (Workings): BENCH MINE, WORKINGS INCLUDE THE COMSTOCK AND MOUNTAIN LION ORE BODIES

Comment (Deposit): THIS DEPOSIT UNDERLIES COMSTOCK, COPPER FRACTION, DEAR, SUNBEAM, STRIP, EMMA AND THE MOUNTAIN LIAR GROUP OF CLAIMS, AND IS KNOWN TO BE ONE LARGE CONTINUOUS ORE BODY. ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV

Comment (Geology): BRECCIATION OF PORPHYRY AND SEDIMENTARY ROCKS IS IMPORTANT IN LOCALIZATION OF IRON MINERALIZATION.

Comment (Commodity): ORE OCCURS AS A SOFT, BLACK, FINE, GRANULAR MIXTURE WITH OCCASIONAL RIBS OF HARD, DENSE MATERIAL.

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

References

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

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

Reference (Deposit): 1976 RECON BULLOCK, UTAH GEOL. MINERAL SURVEY BULLETIN 88

Reference (Production): BULLOCK, 1976, UGMS BULLETIN 88

Reference (Deposit): 1947 DIREXPL YOUNG, U.S. BUREAU OF MINES REPT. INV. 4076

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

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

Reference (Deposit): YOUNG, W.E., 1947, IRON DEPOSITS, IRON COUNTY, UTAH: U.S. BUREAU OF MINES REPORT OF INVESTIGATION 4076, 102 P.

Reference (Deposit): MACKIN, J. HOOVER, 1947, SOME STRUCTURAL FEATURES OF THE INTRUSIONS IN THE IRON SPRINGS DIST.; UTAH GEOL. SOCIETY GUIDEBOOK NO. 2, 62 P.

Reference (Deposit): BLANK, H. RICHARD AND MACKIN, J. HOOVER, 1967, GEOL. INTERPRETATION OF AN AEROMAGNETIC SURVEY OF THE IRON SPRINGS DIST. UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER 516-B, 14 P.

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