The Molalla Clay is a mine located in Clackamas county, Oregon at an elevation of 607 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
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.
Molalla Clay MRDS details
Site Name
Primary: Molalla Clay
Secondary: Molalla Clay Deposit
Secondary: Molalla High-Alumina Clay Deposit
Commodity
Tertiary: Iron
Tertiary: Aluminum
Tertiary: Silica
Tertiary: Titanium
Tertiary: Water, Free
Location
State: Oregon
County: Clackamas
District: Mollala
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
Type: Unknown
Workings
Type: Surface
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Surface
Mining Method: Unknown
Discovery Year: 1911
Years of Production:
Organization:
Significant: N
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
Not available
Rocks
Not available
Analytical Data
Not available
Materials
Unknown: Montmorillonite
Unknown: Limonite
Unknown: Ilmenite
Unknown: Hematite
Unknown: Gibbsite
Unknown: Beidellite
Unknown: Siderite
Unknown: Quartz
Unknown: Pyrite
Unknown: Kaolinite
Comments
Comment (Reserve-Resource): MATRIX ONE, COLUMN ONE; GRADES AND TONNAGES DEVELOPED IN HOUSE IN 1975 FROM RESERVE ESTIMATES MADE BY NICHOLS, R.L. OF THE USGS. MATRIX GRADES AND TONNAGES ARE NON- CUMULATIVE TO THE LEFT. MATRIX ONE, COLUMN TWO; IS ALSO FROM NICHOLS. THE TONNAGE AND GRADE HAS BEEN MULTIPLIED BY THE APPROPRIATE CONVERSIONS TO ACCOUNT FOR METRIC TONNES AND MOISTURE CONTENT. THE ALUMINA AND IRON ANALYSIS ARE BASED ON RECOVER- ABLE AL203 AND FE203. TI02, SI02, AND LOI ANALYSIS ARE ESTIMATES.
Comment (Deposit): DEPOSIT LIFE IS 46 YEARS AT A PRODUCTION RATE OF 2029000 TONNES PER YEAR. THE MILL CAPACITY CAN BE INCREASED ; OR ANOTHER MILL CAN BE ADDED SUBSEQUENTLY OR CONCURRENTLY AND OPERATED FOR 21 YEARS IN ADDITION TO THE CURRENT MILL; WHICH WOULD OPERATE FOR 25 YEARS. THERE ARE THREE SETS OF COSTS; ORIGINAL 1975 COSTS, COSTS UPDATED FROM 1975 TO 1979, AND COMPLETELY RECOSTED 1979 COSTS.
References
Reference (Deposit): U.S. BUREAU OF MINES FILES (WFOC).
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.
