World'sFair Mine

Site Name

Primary: World'sFair Mine
Secondary: Henry Ford Mine

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Commodity

Primary: Silver
Primary: Lead
Secondary: Copper
Secondary: Gold
Secondary: Zinc
Tertiary: Antimony

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Location

State: Arizona
County: Santa Cruz
District: Harshaw District

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Land Status

Land ownership: National Forest
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.

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Holdings

Not available

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Workings

Type: Surface/Underground

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Ownership

Owner Name: Platoro Corp.
Years: 1964 -

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1879
Year Last Production: 1954
Discovery Year: 1879
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

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Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert

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Mineral Deposit Model

Not available

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Orebody

Form: PINCH AND SWELL

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Structure

Type: R
Description: Deposits In Area Are Associated With Contact Of Rhyolite Intruded Into Diorite

Type: L
Description: Vein Is Cut By Weakly Mineralized Cross Faults With Average Left Lateral Displacement Of 75 Ft

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Alterations

Alteration Type: L
Alteration Text: Wall Rocks Strongly Propylitized And Pyritized; Strong Pyrite Gossan

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Rocks

Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

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Analytical Data

Analytical Data: ORE VALUES AVERAGED 58 OZ/TON AG, 6.6% PB, 0.7% CU, MINOR AU AND ZN

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Materials

Ore: Freibergite
Ore: Galena
Ore: Chalcocite
Ore: Sphalerite
Ore: Pyrite
Ore: Silver
Ore: Chalcopyrite
Ore: Tetrahedrite
Gangue: Barite
Gangue: Quartz

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Comments

Comment (Location): 1/2 MILE NORTH OF TRENCH MINE AND MILL ; INFO FROM LAND.ST :(1979)

Comment (Workings): DEVELOPMENTS INCLUDED 600 FT. WINZE; ABOUT 15,000 FT OF DRIFTS, TUNNELS, STOPES, SHAFTS, AND WINZES; DRIFTING 1000 FT EACH WAY FROM WINZE ON VEIN AT LEVELS SPACED 100 FT APART; SHALLOW OPENINGS TO SOUTH OF MINE ARE ALONG N-S RHYOLITE DIKE CUTTING DIORITE

Comment (Geology): VEIN IS CUT OFF BY FLAT-DIPPING FAULT AT SOUTH END OF TUNNEL; UPPER FAULT BLOCK PROBABLY MOVED EAST BUT NO EXPLORATION HAS BEEN DONE IN ORDER TO LOCATE OFFSET UPPER PORTION OF VEIN BEYOND FLAT FAULT; ORE MINERALS ALONG CONTACT CONCENTRATE MAINLY IN RHYOLITE OR HANGING WALL SIDE OF CONTACT; BARITE FORMS SEAMS, BLADES, AND PLATES FILLING FRACTURES AND CAVITIES (INDICATING LATE OR POST VEIN AGE); HYDROTHERMAL ALTERATION AND LIMONITE MINERALIZATION APPEAR TO EXTEND BEYOND LIMITS OF NARROW VEINS ON PROPERTY

Comment (Deposit): PINCH AND SWELL STRUCTURES SUCCEED EACH OTHER AT INTERVALS USUALLY UNDER 50 FT.;VEIN CROPPINGS EXTEND 660 FT OR MORE TO SOUTH OF MINE; VEIN DEPOSITS HAVE A KNOWN VERTICAL RANGE OF 1000 FT, 400 FT OF WHICH IS SEEN IN CROPPINGS AND 600 FT SEEN IN MINE; CROPPINGS AVERAGE 10-14 FT WIDE WHILE VEIN IN MINE IS ABOUT 6 FT WIDE

Comment (Commodity): CHALCOPYRITE AND PYRITE ARE FINELY DISSEMINATED IN WALL ROCK; ORES ARE RICH AND SPOTTY

Comment (Development): OWNERS AND OPERATORS INCLUDED MCNAMEE (1879-1881), W. MORAN (1883-1884), FRANK POWERS (1884-1904), WORLD'S FAIR MINIG CO. (1909), PHELPS DODGE CO. (1912), COMMONWEALTH DEVELOPMENT CO. OF PEARCE (1917-1918), BACHMAN-MERRITT METALS CO., L.L. FERRY, C. SCHELER, M. HOGAN (1923-1926), ZERO MINING CO. (1928), TRENCH MINING CO. (1929), WORLD'S FAIR DEVELOPMENT CO., RICHEY, MAX DRACHMAN, GOLD CANYON MINING CO. (1936), J.C. SCHELL (1937-1941), A. GRIFFITH AND KRAMER, AMERICAN SMELTING AND REFINING CO. (1952), KELSEY (1954); PROPERTY COMPRISES 19 UNPATENTED LODE CLAIMS

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References

Reference (Deposit): TENNEY, JAMES B., 1927-1929, HISTORY OF MINING IN ARIZONA; ARIZONA BUREAU OF MINES, P. 301-303

Reference (Deposit): SCHRADER, FRANK C., 1915, MINERAL DEPOSITS OF THE SANTA RITA AND PATAGONIA MOUNTAINS, ARIZONA; USGS BULLETIN 582, P. 248-251

Reference (Deposit): SIMONS, FRANK S., 1974, GEOLOGIC MAP AND SECTIONS OF THE NOGALES AND LOCHIEL QUADRANGLES, SANTA CRUZ COUNTY, ARIZONA; USGS MAP I-762 (1:48000)

Reference (Deposit): ADMR FILE DATA, WORLD'S FAIR MINE

Reference (Deposit): ABGMT-USBM FILE DATA

Reference (Deposit): USBM FILES, WORLD'S FAIR MINE

Reference (Deposit): KEITH, STANTON B., INDEX OF MINING PROPERTIES IN SANTA CRUZ COUNTY, ARIZONA; ARIZONA BUREAU OF MINES BULLETIN 191, P. 60

Reference (Deposit): ABGMT FILES, STANTON B. KEITH

Reference (Deposit): KARTCHNER, WAYNE E., 1944, THE GEOLOGY AND ORE DEPOSITS OF A PORTION OF THE HARSHAW DISTRICT, PATAGONIA MOUNTAINS, ARIZONA; PHD. THESIS, UNIVERSITY OF ARIZONA,P. 86-88

Reference (Deposit): ABGMT CLIPPINGS FILE; WORLD'S FAIR MINE, WORLD'S FAIR EXTENSION MINES

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Arizona Gold

"Where to Find Gold in Arizona" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Arizona.