Judy Mine

The Judy Mine is a chromium mine located in Del Norte county, California at an elevation of 2,730 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.

Site Name

Primary: Judy Mine
Secondary: Hicks Mine
Secondary: Victory No. 2

Commodity

Primary: Chromium
Tertiary: Rhodium
Tertiary: Ruthenium
Tertiary: Iridium
Tertiary: Palladium
Tertiary: Platinum

Location

State: California
County: Del Norte
District: High Plateau Area

Land Status

Land ownership: National Forest
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

Type: Surface/Underground

Ownership

Owner Name: Brown, Hughes, And Bird, 409 Ne Sixth St., Grants Pass, Or 97526

Owner Name: R. I. Hicks

Production

Year: 1956
Time Period: 1955-1956
Material type: ORE
Description: Cp_Grade: ^45.6% Cr2o3, Cr:Fe=2.7:1
Year: 1954
Time Period: 1953-1954
Material type: ORE
Description: Cp_Grade: ^45.6% Cr203, Cr:Fe=2.7:1
Year: 1943
Time Period: 1942-1943
Material type: ORE
Description: Cp_Grade: ^42.7-45.2% Cr2o3, Cr:Fe=2.74-2.92

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1942
Year Last Production: 1956
Discovery Year: 1941
Discovery Method: Ore-Mineral In Place
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

Model Name: Podiform chromite (minor)

Orebody

Form: MASSIVE AND DISSEMINATED, CIGAR-SHAPED LENS

Structure

Type: L
Description: A Fault, Striking N45w And Dipping 64sw, Cuts Ore At Depth Of 8 M

Alterations

Alteration Type: L
Alteration Text: Ultramafic Rocks Intensely Serpentinized In Shear Zones

Rocks

Name: Harzburgite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

Name: Harzburgite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Jurassic

Name: Harzburgite
Role: Associated
Age Type: Associated Rock
Age Young: Late Jurassic

Analytical Data

Analytical Data: RH=39 PPB. CR:FE=2.7:1
Analytical Data: RU=410 PPB
Analytical Data: IR=250 PPB
Analytical Data: PD=10 PPB
Analytical Data: 1 PGE ANALYSIS: PT=59 PPB

Materials

Ore: Chromite
Gangue: Olivine

Comments

Comment (Development): IDLE IN 1951

Comment (Workings): 20 DEG. INCLINED SHAFT AND UNKNOWN AMOUNT OF DRIFTS AND STOPES. SEVERAL THOUSAND SQ FT SCRAPED BY BULLDOZER. GROUND IS BROKEN BY FAULTING AND IS HARD TO SUPPORT.

Comment (Geology): PERIDOTITE RELATIVELY FRESH WHERE NOT SHEARED

Comment (Deposit): RECORD M007523 HAS BEEN MERGED AND DELETED.

Comment (Location): UNUSRVEYED. IN SIX RIVERS NATIONAL FOREST. MINE IS 1.5 MI WEST OF HIGH PLATEAU MINE ON A SPUR HEADING SOUTHWEST OF LOW PLATEAU. UTM LOCATION GIVEN IS FOR PGE SAMPLE COLLECTION SITE. LAT/LONG GIVEN IS FOR SHAFT SYMBOL LABELED JUDY MINE ON TOPO MAP; UTM FOR THIS IS 4642040N, 418830E.

Comment (Commodity): CHROMITE IS COARSE GRAINED

References

Reference (Deposit): CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.

Reference (Deposit): STINSON, M.C., 1975, CALIFORNIA DIVISION OF MINES AND GEOLOGY MINERAL PROPERTY REPORT, UNPUB.

Reference (Deposit): WELLS, F.G., CATER, F.W., JR., AND RYNEARSON, G.A., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 1, CH. 1, P. 36-38.

Reference (Deposit): O'BRIEN, J.C., 1952, MINES AND MINERAL RESOURCES OF DEL NORTE COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 48, NO. 4, P. 273-289.

Reference (Production): STINSON, 1975

California Gold

"Where to Find Gold in California" 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 California. Read more: Where to Find Gold in California.