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
Elevation: 6,138 Feet (1,871 Meters)
Commodity: Silver, Gold
Lat, Long: 41.82778, -117.58583
Map: View on Google Maps
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.
Chefoo Tunnel MRDS details
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.
