The Bertha Prospect is a manganese mine located in Clallam county, Washington at an elevation of 4,902 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: 4,902 Feet (1,494 Meters)
Commodity: Manganese
Lat, Long: 48.0175, -123.75083
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.
Bertha Prospect MRDS details
Site Name
Primary: Bertha Prospect
Commodity
Primary: Manganese
Secondary: Iron
Location
State: Washington
County: Clallam
Land Status
Land ownership: National Park
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
Owner Name: Harry Sweeds, Et. Al, Port Angeles, Wash.
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Deposit Type: Replacement
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: Olympic Mountains
Mineral Deposit Model
Not available
Orebody
Form: LENSES
Structure
Type: L
Description: Small Left-Lateral Strike-Slip Fault, North Trending With 30 Ft Of Apparent Offset In The Second Ore Lens.
Alterations
Not available
Rocks
Name: Basalt
Role: Associated
Age Type: Associated Rock
Age Young: Eocene
Name: Basalt
Role: Associated
Age Type: Host Rock
Age Young: Eocene
Name: Basalt
Role: Associated
Age Type: Associated Rock Unit
Age Young: Eocene
Name: Basalt
Role: Associated
Age Type: Host Rock Unit
Age Young: Eocene
Analytical Data
Analytical Data: ASSAY (USBM TOOK 19 SAMPLES IN 1940): AVG. 10.3% MN, 20.5% FE, 38.9% IN SOL.
Materials
Ore: Bementite
Gangue: Jasper
Comments
Comment (Geology): THE PRINCIPAL ROCKS ASSOCIATED WITH THE MN MINERALIZATION ARE ALTERED PILLOW BASALT, JASPER, SILICIFIED LIMESTONE, AND PHYLLITE. THESE ROCKS STRIKE EASTERLY AND DIP STEEPLY SOUTH. JOINTING AND FRACTURING GIVE THEM A BLOCKY APPEARANCE. TWO LENTICULAR BODIES OF MN SILICATES ARE CONFORMABLE WITH THE COUNTRY ROCKS. ONE IS INTERMITTANTLY EXPOSED FOR 230 FT AND RANGES FROM LESS THAN 1 FT TO 12 FT IN WIDTH. THE FOOT WALL IS BASALT, AND THE HANGING WALL IS JASPER AND RED, SILICEOUS LIMESTONE. THE SECOND LENS IS 25 FT SOUTH OF THE FIRST AN HAS AN EXPOSED AREA OF 60 BY 135 FT. A STEEPLY DIPPING FAULT NEAR THE CENTER OF THE LENS STRIKES NORTH AND HAS OFFSET THE WESTERN PART 30 FT TO THE SOUTH. HOST ROCKS SOUTH OF THIS LENS ARE THIN-BEDDED LIMESTONE AND SHALES.
Comment (Deposit): 1 CLAIM. ; INFO.SRC : 1 PUB LIT
Comment (Location): ABOUT 1 1/2 MILES WEST OF LIZARD HEAD PEAK ALONG THE HAPPY LAKE RIDGE TRAIL; JUST BELOW THE RIDGE CREST.
Comment (Development): UNKNOWN DEVELOPMENT
Comment (Deposit): THE MANGANIFEROUS MATERIAL IS A DENSE, BLACK, IRON-RICH SILICEOUS ROCK WITH SPARSELY DISTRIBUTED BANDS OR VEINLETS OF BEMENTITE.
References
Reference (Deposit): USGS BULL 931-R, P. 447-448
Reference (Deposit): WASH. DMG BULL 37, P. 254
Reference (Deposit): USGS RI 5530, P. 51-52
Washington Gold
"Where to Find Gold in Washington" 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 Arizona. Read more: Where to Find Gold in Washington.
