Milton Claim

The Milton Claim is a chromium mine located in Sierra county, California at an elevation of 6,821 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: Milton Claim
Secondary: Redmayne and Mcgonigal Prospect

Commodity

Primary: Chromium

Location

State: California
County: Sierra
District: Sierra City Area

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

Not available

Workings

Not available

Ownership

Owner Name: Hartley, Mrs. Jean
Home Office: 5020 Winding Way, Sacramento, Ca. 95841

Owner Name: Zaring, R. C.

Production

Year: 1941
Material type: ORE
Description: Ap_Grade: ^Lump Ore Averaging 40.60% Cr2o3

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1941
Year Last Production: 1941
Discovery Year: 1918
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada

Mineral Deposit Model

Not available

Orebody

Form: LENSE

Structure

Type: L
Description: Two Dominant Directions Of Shearing Found In The Deposit. One Trending N70-75w, The Other Trending N10-20e

Alterations

Alteration Type: L
Alteration Text: Moderate To Complete Serpentinization Of Host Rock.

Rocks

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Andesite
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Andesite
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian

Analytical Data

Analytical Data: ORE CONTAINS 40.6% CR2O3, CR TO FE RATIO 2.36 TO

Materials

Ore: Chromite
Gangue: Uvarovite

Comments

Comment (Commodity): ANALYSIS MADE BY THE SMITH EMERY COMPANY, 1941

Comment (Location): LOCATED NEAR THE HEADWATERS OF THE MIDDLEFORK OF THE YUBA RIVER.

Comment (Reserve-Resource): STINSON, 1975

Comment (Reserve-Resource): TOTAL RESERVES.

Comment (Deposit): ORE OCCURES AS DISCONTINUOUS LENSES OF THE ABOVE DIMENSIONS ENCLOSED IN LARGER, LENS-SHAPED DUNITE BODIES.

Comment (Workings): WORKINGS CONSISTED OF AN UPPER CUT, 65 FT. LONG, 10-15 FT WIDE AND A SMALLER OPEN CUT WITH AN ADIT DRIVEN IN THE WEST WALL, 45-50 FT LOWER AND 100 FT EAST OF THE UPPER CUT.

Comment (Geology): THE DEPOSIT OCCURS IN A LINEAR MASS OF ULTRAMAFIC ROCK EXPOSED IN THE NORTHERN SIERRA NEVADA MOUNTAINS.

References

Reference (Deposit): RYNEARSON, G.A., 1950, CDMG BULL 134, PART 3, CHAPT. 5, P. 257, 258.

Reference (Deposit): AVERILL, C.V., 1942, CALIF. JOURNAL OF MINES AND GEOL., V. 38, NO. 1, P. 16.

Reference (Deposit): STINSON, M.C., 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

Reference (Production): AVERILL, 1942.

Reference (Reserve-Resource): 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.