Jumbo Mine

The Jumbo Mine is a gold and silver mine located in Lincoln county, Nevada at an elevation of 6,201 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

Satelite View

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: Jumbo Mine
Secondary: Horn
Secondary: Probably Same As Blue Jay Claims
Secondary: NBMG Sample Site 1754.

Commodity

Primary: Gold
Primary: Silver
Secondary: Zinc
Secondary: Lead
Secondary: Copper
Tertiary: Barium-Barite

Location

State: Nevada
County: Lincoln
District: Delamar (Ferguson) District 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

Owner Name: Mrs. Agnes Horn
Home Office: Delamar
Years: 1930 -

Production

Year: 1935
Time Period: 1932-1935
Material type: ORE AU AG
Description: Cp_Grade: ^Average Grade Au 2.83 Oz/Ton Ag 6.15 Oz/Ton

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1892
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: Abundant Normal Faults

Type: L
Description: Postmineral Fractures

Alterations

Not available

Rocks

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

Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Early Cambrian

Analytical Data

Analytical Data: SHIPMENTS FROM HORN LEASE: IN 1932, FROM 140.37 TONS (DRY WEIGHT), AVERAGE YIELD WAS 6.58 OZ/TON AU, 13.19 OZ/TON AG. IN 1933, FROM 94.47 TONS, 4.37 OZ/TON AU, 9.11 OZ/TON AG. 1934, FROM 294.09 TONS, 1.55 OZ/TON AU, 3.156 OZ/TON AG. 1935, FROM 292.93 TONS, .992 OZ/TON AU, AND 3.31 OZ/TON AG. SAMPLE 1754 CONTAINS 10 PPM AG, 1000 PPM BA, 100 PPM BI, 150 PPM CU, 150 PPM PB, 100 PPM ZR. SAMPLE 1754 CONTAINS 10 PPM AG, 1000 PPM BA, 100 PPM BI, 150 PPM CU, 150 PPM PB, 100 PPM ZR.

Materials

Ore: Barite
Ore: Chalcopyrite
Ore: Gold
Ore: Tetrahedrite
Ore: Cerargyrite
Ore: Sphalerite
Ore: Galena
Gangue: Pyrite

Comments

Comment (Deposit): VEIN PARALLELS THE APRIL FOOL VEIN. STOPES AND SHAFTS EXPLORE THE N20E, 70 NW QUARTZ VEIN IN THE QUARTZITES. THE VEIN CONSISTS OF QUARTZ-CEMENTED QUARTZITE BRECCIA. THE FOOTWALL OF THE VEIN FORMS A BOLD RESISTANT OUTCROP TRACEABLE FOR 1000 TO 1500 FT. THE SHEAR (SIC) ROCK FACE IS SILICIFIED AND IRON STAINED AND SHOWS QUARTZ VEINS AND QUARTZ-CEMENTED BRECCIA ZONES WHICH CONTAIN ANGULAR FRAGMENTS OF QUARTZITE. THE MINED PORTION OF THE BRECCIA ZONE HAS A RUBBLY OR BOULDERY APPEARANCE. BRECCIA ZONE APPEARS TO BE TRUNCATED AT N END BY A FAULT RUNNING UP DELAMAR CANYON. DUMP ROCK CONSISTS MAINLY OF QUARTZITE AND QUARTZ VEIN MATERIAL, BUT SOME SILTSTONE IS ALSO PRESENT. WHITE COMB AND PRISMATIC QUARTZ ENCRUST QUARTZITE AND MICACEOUS GREEN SILTSTONE FRAGMENTS. THE BRECCIA SHOWS OPEN (EUHEDRAL) QUARTZ-FILLED VUGS BETWEEN FRAGMENTS. SOME VUGS ARE FILLED WITH CLAY AND IRON OXIDES. SOME VEIN MATERIAL CONTAINS MINOR PYRITE, CHALCOPYRITE, COPPER OXIDES, TETRAHEDRITE ?, WHITE BARITE (ROCKS VERY

Comment (Deposit): DENSE) AND GOSSANY PORTIONS.

Comment (Workings): PRODUCTIVE VEIN EXPLORED ON 3 CLOSELY SPACED LEVELS. WINZE, SMALL STOPE. WINZE, SMALL STOPE.

Comment (Location): ON SOUTH SIDE OF THE WASH ; INFO FROM LAND.ST :(1982) (1982)

Comment (Reserve-Resource): THE SURFACE EXPOSURES AND UNDERGROUND WORKINGS SHOW EXTENSIVE BRECCIATION AND MINERALIZATION, AND CALLAGHAN SUGGESTS THAT THE CLAIM WARRANTS MORE EXTENSIVE PROSPECTING AND DEVELOPMENT THAN IT HAD RECEIVED BY 1937

Comment (Development): NO ACTIVITY AT TIME OF EXAMINATION IN 1983.

Comment (Geology): ORE IS IN CHERTY QUARTZ VEIN 6 INCHES WIDE AND NARROW QUARTZ STRINGERS. ORE SHOOT WAS 90 FEET LONG IN THE TUNNEL AND THEN PITCHES NORTH. THE NORTHERN PART OF THE VEIN TERMINATED AGAINST A GROUP OF FRACTURES CONTAINING EAST WEST DIKES. A SECOND ORE VEIN HAS BEARING N 22 E, 63 W. HORN SILVER WAS FOUND ON FRACTURE SURFACES.

References

Reference (Deposit): SMITH, A.M. AND CARPENTER, J., 1931, NOTES FROM INSPECTION TRIP: NBMG DISTRICT FILE 167, ITEM 3.

Reference (Deposit): NBMG DISTRICT FILE 167, ITEM 5.

Reference (Deposit): BENTZ, J. AND SMITH, P., 1983, FIELD EXAMINATION REPORT, SEPT 30, 1983.

Reference (Production): CALLAGHAN, 1937

Reference (Deposit): CALLAGHAN, E., 1937, GEOLOGY OF THE DELAMAR DISTRICT, LINCOLN CO, NEV. NEV BUREAU OF MINES V. 31 NO. 5 P. 60-64

Reference (Deposit): TSCHANZ, C.M. AND PAMPEYAN, E.H., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN CO., NEV. NEV. BUR MINES BULL 73, P. 141

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.