Zella Mine

The Zella Mine is a gold and silver mine located in Tooele county, Utah at an elevation of 8,320 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: Zella Mine

Commodity

Primary: Gold
Primary: Silver
Secondary: Lead

Location

State: Utah
County: Tooele
District: Ophir District

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: Underground

Ownership

Not available

Production

Not available

Deposit

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

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Uinta Extension

Mineral Deposit Model

Not available

Orebody

Form: IRREGULAR

Structure

Type: R
Description: Basin And Range

Type: L
Description: Faults And Fissures

Alterations

Alteration Type: L
Alteration Text: Silicification

Rocks

Name: Lamprophyre
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Lamprophyre
Role: Associated
Age Type: Host Rock
Age Young: Mississippian

Name: Lamprophyre
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Not available

Materials

Ore: Cerargyrite
Ore: Gold
Ore: Plumbojarosite
Gangue: Sericite
Gangue: Barite
Gangue: Calcite
Gangue: Quartz

Comments

Comment (Production): NO PRODUCTION FIGURES AVAILABLE.

Comment (Deposit): CLARK BLUISH GREY LIMESTONE WITH SPARSE CALCITE VEINS AND CHERT LENSES ALONG BEDDING PLANES, THIN BEDDED TO MASSIVE

Comment (Workings): 70 FT HIGHWALL ON QUARRY

Comment (Deposit): IRON-STAINING AND CALCITE ALONG JOINTS WHICH FORM HIGHWALLS ; INFO.SRC : 1 PUB LIT; 3 FIELD OBSERV

Comment (Location): INFO FROM LAND.ST :(1977)

Comment (Production): THE TOTAL PRODUCTION OF THE FELLA GROUP, WHICH COMPRISES FELLA, MOUNTAIN TIGER, SILVER CHIEF AND ROCKWELL, WAS ESTIMATED AS $750,000; PRODUCTION FIGURES ARE NOT AVAILABLE.

Comment (Deposit): THE ORE OUTCROPPED IN TWO PLACES. THREE LARGE BODIES AND SEVERAL SMALLER ONES WERE FOUND ABOUT 20 FEET BELOW THE SURFACE. THE ORE IS A SOFT YELLOW SILICEOUS CHLORIDE, AND IS HIGHLY OXIDIZED.

Comment (Workings): SEVERAL SHAFTS AND TUNNELS, IN ALL OVER 6,500 FT. THE ACTUAL WORKING DEVELOPMENT ON THE STRATUM CONTAINING ORE DOES NOT, HOWEVER, EXTEND OVER 125 FT. VERTICALLY AND 800 FEET HORIZONTALLY. THE WORKINGS ARE NOW CAVED AND INACCESSIBLE.

Comment (Geology): MINERALIZATION IS ASSOCIATED WITH JASPEROID.

Comment (Deposit): THE DEPOSIT IS CONFINED TO THE LOWER PART OF THE 'GREAT BLUE' LIMESTONE, WHERE IT DIPS GENTLY WESTWARD ON THE WESTERN FLANK OF OPHIR ANTICLINE. A FAULT TRENDING N45W WAS OBSERED AT THE MINE SITE, AND CONSIDERABLE WORK HAD BEEN DONE ALONG THE CONTACT OF A LAMPROPHYRE DIKE TRENDING DUE NORTH. ; INFO.SRC : 1 PUB LIT

References

Reference (Deposit): BISSELL, H.J., ET. AL., 1959, GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 14, UT. GEOL. SOC.: U.G.M.S. BULL. 14, 262P.

Reference (Deposit): GILLULY, J., 1932, GEOLOGY AND ORE DEPOSITS OF THE STOCKTON AND FAIRFIELD QUADRANGLES: U.S.G.S. PROF. PA. 173, 167P.

Reference (Deposit): BUTLER, B.S., ET. AL., 1920, THE ORE DEPOSITS OF UTAH: U.S.G.S. PROF. PA. 111, 672P.

Reference (Deposit): SPURR, J.E., 1895, ECONOMIC GEOLOGY OF THE MERCUR MINING DISTRICT, UTAH: U.S.G.S. 16TH. ANN. REPT., PT. 2, 454P.

Reference (Production): GILLULY, J., 1932, P. 141

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