Twitchell Ore Body

The Twitchell Ore Body is a iron mine located in Iron county, Utah at an elevation of 5,830 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: Twitchell Ore Body

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: James D. Murphy

Owner Name: Utah International, Inc.

Production

Not available

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
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: IRREGULAR

Structure

Type: R
Description: Sevier Thrust System

Type: L
Description: Clive Fault, Granite Mtn Intrusion

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: Host Rock
Age Young: Late Cretaceous

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 Cretaceous

Analytical Data

Analytical Data: IRON 35%

Materials

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

Comments

Comment (Deposit): ORE BODY IS NON-OUTCROPPING AND OCCURS ALONG THE CLIVE FAULT WHICH BROUGHT THE IRON SPRINGS FORMATION IN FAULT CONTACT WITH QUARTZ MONZONITE PORPHYRY.

Comment (Workings): BENCH MINE, ELONGATED PIT

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

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 O., 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, MINERALS 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, UTAH GEOL. AND MINERAL SURVEY BULLETIN 88

Reference (Production): STEGEN, R.J., 1979, UGMS ON SITE INVESTIGATIONS

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