The Portland Group is a gold mine located in Josephine county, Oregon.
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.
Portland Group MRDS details
Site Name
Primary: Portland Group
Secondary: Holland
Commodity
Primary: Gold
Secondary: Silver
Location
State: Oregon
County: Josephine
District: Waldo
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
Year: 1923
Time Period: 1923
Material type: ORE
Description: Cp_Grade: ^0.2-0.74 Au, 0.2 Ag
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Silicified, Bleached, Altered Shear Zone
Rocks
Name: Argillite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Triassic
Analytical Data
Not available
Materials
Gangue: Quartz
Comments
Comment (Location): CEN
Comment (Workings): SHAFT 115, ADIT 350 TOTAL PRODUCTION NOT REPORTED
Comment (Geology): QUARTZ VEINS IN A SILICIFIED, BLEACHED, AND ALTERED SHEAR ZONE.
Comment (Deposit): RECORD NUMBER (M013292) HAS BEEN MERGED WITH THIS RECORD AND DELETED FROM THE OREGON FILE.
Comment (Production): TOTAL PRODUCTION NOT REPORTED
References
Reference (Deposit): BROOKS, H.C. AND RAMP, L., 1968, GOLD AND SILVER IN OREGON; ODGMI BULL. 61, P.261
Reference (Deposit): OREGON METAL MINES HANDBOOK, 1942, ODGMI BULL. 14-C, VOL. 2, SEC. 1, P.212
Reference (Production): USBM
Reference (Deposit): RAMP, L. AND PETERSON, N.V., 1979, GEOLOGY AND MINERAL RESOURCES OF JOSEPHINE COUNTY, OREGON; ODGMI BULL. 100, 45P
Oregon Gold
"Where to Find Gold in Oregon" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Oregon. Read more: Where to Find Gold in Oregon.
