The Portland Tunnel is a mercury mine located in Multnomah 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 Tunnel MRDS details
Site Name
Primary: Portland Tunnel
Commodity
Primary: Mercury
Location
State: Oregon
County: Multnomah
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: City Of Portland
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
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: Puget Trough
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Replaced By Hematite
Rocks
Name: Basalt
Role: Host
Age Type: Host Rock Unit
Age Young: Miocene
Analytical Data
Analytical Data: 11 SAMPLES RANGED FROM TRACE TO 1.0 LB HG PER TON
Materials
Gangue: Chalcedony
Gangue: Hematite
Comments
Comment (Location): S/2 SEC 30 LOCATED AT CENTER OF HALF SECTION
Comment (Geology): HR.AGE.MV: BASALT FLO
Comment (Workings): TUNNEL 960 FT LONG. CAVED AT PORTAL
References
Reference (Deposit): BROOKS, H. C., 1963, QUICKSILVER IN OREGON: OREGON DEPT. OF GEOLOGY AND MINERAL INDUSTRIES, BULL. 55, 223 P.
Reference (Deposit): MERCURY IN OREGON, 1965, USBM IC 8252 TABLE 26, P. 324.
Reference (Deposit): FREDERICK, F., 1945, STATE OF OREGON MAP SHOWING LOCATION OF QUICKSILVER DEPOSITS: OREGON DEPT. OF GEOL. AND MIN. INDUSTRIES, SCALE 1:1,000,000
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.
