Portland Group

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

Name: Portland Group  

State:  Oregon

County:  Josephine

Elevation:

Commodity: Gold

Lat, Long: 42.11806, -123.51194

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.


Satelite image of the Portland Group

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

"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.