The Portland Mine is a gold mine located in Esmeralda county, Nevada at an elevation of 5,899 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: 5,899 Feet (1,798 Meters)
Commodity: Gold
Lat, Long: 37.70056, -117.21694
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.
Portland Mine MRDS details
Site Name
Primary: Portland Mine
Commodity
Primary: Gold
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
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Unknown
Operation Type: Unknown
Discovery Year: 1906
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Strong Alteration
Rocks
Name: Latite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Tuff
Role: Host
Age Type: Host Rock
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Basalt
Role: Associated
Age Type: Host Rock
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Latite
Role: Associated
Age Type: Associated Rock Unit
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Basalt
Role: Host
Age Type: Host Rock
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Name: Andesite
Role: Host
Age Type: Associated Rock Unit
Age in Years: 21.250000+-0.750000
Dating Method: K-Ar
Age Young: Early Miocene
Analytical Data
Not available
Materials
Gangue: Pyrite
Comments
Comment (Workings): IN 1905, SHAFT WAS TO 250 FT. WITH LEVEL WORKINGS THERE. IN 1908 A LEVEL HAD BEEN RUN AT 400 FT. LEVEL
Comment (Geology): SOFT ALTERED OLIVINE BASALT CONTAINS MUCH DISSEMINATED PYRITE. GROUND IS VERY SOFT
Comment (Location): CLAIM EXTENDS FROM S END OF COMBINATION GROUP SSE TO MYERS MTN. UTM IS TO ONE SHAFT ON THE CLAIM. ; INFO FROM LAND.ST :(1972)
References
Reference (Deposit): RANSOME, F.L., 1909, USGS PP 66, P. 245
Reference (Deposit): NBMG REPORT 33, P. 77-86.
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.
