Jumbo Extension Mining Co.

The Jumbo Extension Mining Co. is a gold and silver mine located in Esmeralda county, Nevada at an elevation of 5,719 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 Extension Mining Co.
Secondary: Velvet
Secondary: Paloverde Claims

Commodity

Primary: Gold
Primary: Silver
Secondary: Copper
Tertiary: Bismuth
Tertiary: Tin

Location

State: Nevada
County: Esmeralda
District: Goldfield 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

Not available

Ownership

Not available

Production

Year: 1916
Time Period: 1914-1916
Material type: AUAG-CU ORE
Description: Cp_Grade: ^Average 1.35 Oz/Ton Au, 4.41 Oz/Ton Ag, 2.79% Cu
Year: 1915
Material type: ORE-AUAGCU
Description: Ap_Grade: ^Averaged 1.35oz/Ton Au, 4.41oz/Tag, 2.79% Cu

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1904
Discovery Year: 1903
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

Not available

Mineral Deposit Model

Model Name: Epithermal quartz-alunite Au

Orebody

Form: TABULAR TO IRREGULAR

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Pyritization, Alunitization, Kaolinization

Rocks

Name: Latite
Role: Associated
Age Type: Associated Rock
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene

Name: Latite
Role: Host
Age Type: Associated Rock
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene

Analytical Data

Analytical Data: SPECTROSCOPIC ANALYSES IN 1939-1940 REVEALED PRESENCE OF SMALL AMOUNTS OF TIN IN THE ORE

Materials

Ore: Famatinite
Gangue: Pyrite
Gangue: Alunite
Gangue: Quartz
Gangue: Kaolinite

Comments

Comment (Location): ADJOINTS E. SIDE OF GOLDFIELD CONSOLIDATED MINES CO. CLAIMS . UTM IS TO WORKINGS IN N END OF CLAIM AREA. ; INFO FROM LAND.ST :(1972)

Comment (Development): VELVET CLAIM WAS SENDING SMALL SHIPMENTS OF GOLD ORE BY LATE 1904. THE VELVET WAS ACQUIRED BY THE JUMBO EXT. MINE CO. IN 1914 FROM THE ADJOINING GOLDFIELD MERGER MINES CO. MERGER HAD DONE EXPLORATORY WORK TO 1772 FT, THE DEEPEST IN THE DISTRICT (IN 1911). JUMBO EXT. THEN FOUND RICH ORE ON THE VELVET IN 1914-15. IT WAS INVOLVED IN LITIGATION IN 1915.

Comment (Deposit): ONE ORE BODY ACTUALLY FILLED A SMALL EROSIONAL GULLY IN SHALE UNDERLY VOLCANICS AT 1750. FT LEVEL

Comment (Workings): SHAFT OVER 830 FT DEEP

References

Reference (Deposit): SHAMBERGER, H.A., 1982, THE STORY OF GOLDFIELD; NEVADA HISTORICAL PRESS, CARSON CITY, NEVADA, 240 P.

Reference (Deposit): NBMG REPORT 33, P. 77-86

Reference (Deposit): NBMG BULL 48, P. 17-18

Reference (Deposit): RICHARD, T.A., MAY 1915, MIN. & SC1 PRESS, P. 797.

Reference (Deposit): WEED, W.H., ED., 1922, THE MINES HANDBOOK, VOL. XV, P.1233.

Reference (Deposit): LINCOLN, F.C., 1923, MINING DISTRICTS AND MINERAL RESOURCES OF NEVADA: RENO, NV. NEWSLETTER PUBLISHING CO.

Reference (Production): SHAMBERGER, H.A., 1982, P.199. SEARLS, F., 1948, P. 17-18

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.