Chefoo Tunnel

The Chefoo Tunnel is a silver and gold mine located in Humboldt county, Nevada at an elevation of 6,138 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: Chefoo Tunnel
Secondary: Round Hill Prospect
Secondary: Probably Same As Birthday Mine

Commodity

Primary: Silver
Primary: Gold
Tertiary: Copper
Tertiary: Arsenic
Tertiary: Iron
Tertiary: Zinc
Tertiary: Antimony

Location

State: Nevada
County: Humboldt
District: National 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
Deposit Type: Vein
Operation Type: Unknown
Discovery Year: 1915
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: Basin And Mountains

Mineral Deposit Model

Model Name: Epithermal vein, Comstock

Orebody

Not available

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Sericite, Calcite, Pyrite, Clay, Silicic

Rocks

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

Analytical Data

Analytical Data: 16 OZ AG/TON (IN 1915)
Analytical Data: 20/TON AU

Materials

Ore: Sphalerite
Ore: Stibnite
Ore: Chalcopyrite
Ore: Pyrite
Ore: Marcasite

Comments

Comment (Location): SOUTH SIDE OF ROUND HILL 3/4 MILE W OF NATIONAL MINE.

Comment (Deposit): TABULAR

Comment (Workings): DRIFTS, CROSSCUT

Comment (Geology): GEOL.COM: 3.FT. WIDE VEIN OF SILICIFIED, PYRITIC, MATERIAL

Comment (Deposit): A CROSSCUT TUNNEL ENCOUNTERS THE VEIN AT 416 FT, ALONG WHICH DRIFTS EXTEND 45 FT. SOUTH AND 20 FT NORTH. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

References

Reference (Deposit): NBMG STAFF, 1985, NBMG OFR 85-3.

Reference (Production): LINDGREN, W, 1915.

Reference (Deposit): WILLDEN, R., 1964, GEOLOGY AND MINERAL DEPOSITS FO HUMBOLDT COUNTY, NEVADA: NEV. BUREAU OF MINES BULL. 59

Reference (Deposit): LINDGREN, W, 1915, GEOLOGY AND MINERAL DEPOSITS OF THE NATIONAL MINING DISTRICT, NEV: U.S.G.S. BULL 601.

Reference (Deposit): LAWRENCE, E. F., 1963, ANTIMONY DEPOSITS OF NEVADA; NEV. BUR MINES BULL. 61.

Reference (Deposit): 1979 MILS DATA

Reference (Deposit): TINGLEY, J. V., 29 SEP 84, NBMG FIELD EXAMINATION

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.