The Portland Mine is a silver and gold mine located in Pershing county, Nevada at an elevation of 4,790 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: 4,790 Feet (1,460 Meters)
Commodity: Silver, Gold
Lat, Long: 40.43083, -118.78944
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
Secondary: NBMG Sample Site 2821.
Commodity
Primary: Silver
Primary: Gold
Tertiary: Lead
Tertiary: Zinc
Location
State: Nevada
County: Pershing
District: Seven Troughs District
Land Status
Land ownership: BLM Administrative Area
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
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Magmatic, Breccia-Filling
Operation Type: Unknown
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
Not available
Rocks
Not available
Analytical Data
Analytical Data: SAMPLE 2821 SELECTED FROM DUMPS AND NEAR LARGE ORE BIN, AND VEIN, CONTAINS 5 % FE, 0.5 % MG, 0.1 % CA, 0.2 % TI, 200 PPM MN, 15 PPM AG, 500 PPM AS, 50 PPM B, 700 PPM BA, 1 PPM BE, 20 PPM CR, 150 PPM CU, 15 PPM MO, 7 PPM NI, 30 PPM PB, 7 PPM SC, 100 PPM SR, 100 PPM V, 15 PPM Y, 150 PPM ZR, AND 1.3 PPM AU (BY AA ANALYSIS).
Materials
Ore: Gold
Comments
Comment (Location): ACCESSIBILITY IS GOOD ON ROAD NORTH OF VERNON. . INFO FROM LAND.ST :(1972)
Comment (Development): GOOD PRODUCER DISCOVERED LATE IN THE HISTORY OF THE CAMP. MOST ACTIVELY WORKED IN THE DISTRICT DURING THE 1940S.
Comment (Deposit): SAMPLE 2821 CONSISTS OF PARTLY VUGGY VOLCANIC BRECCIA, IRON-STAINED, WITH VISIBLE BUT UNIDENTIFIED SULFIDES IN THE MATRIX. ORE IS VERY QUARTZ-POOR COMPARED TO OTHER MINES OF THE DISTRICT.; MODEL NAME COULD ALSO BE: DETACHMENT FAULT-RELATED BASE- AND PRECIOUS-METALS.
Comment (Workings): ONE MAJOR SHAFT WITH ADJOINING ADITS AND CONSIDERABLE UNDERGROUND WORKINGS.
Comment (Deposit): THIS RECORD HAS BEEN MERGED WITH M242815, WHICH HAS BEEN DELETED.
References
Reference (Deposit): QUADE, J., 1984, NBMG FIELD EXAMINATION REPORT AND SAMPLE ANALYSIS: UNPUBLISHED NBMG (TINGLEY) FILES.
Reference (Deposit): JOHNSON, M. G., 1977, GEOLOGY AND MINERAL DEPOSITS OF PERSHING COUNTY, NEVADA: NBMG BULL. 89, P. 88.
Reference (Deposit): SHAMBERGER, M. A., 1972, THE STORY OF SEVEN TROUGHS, PERSHING COUNTY, NEVADA - HISTORIC MINING CAMPS OF NEVADA, NO. 3: USGS AND NEVADA DEPARTMENT OF CONSERVATION AND NATURAL RESOURCES, NEVADA HISTORICAL PRESS, CARSON CITY.
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.
