Seiad Creek

The Seiad Creek is a chromium mine located in Siskiyou county, California at an elevation of 3,323 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

Name: Seiad Creek  

State:  California

County:  Siskiyou

Elevation: 3,323 Feet (1,013 Meters)

Commodity: Chromium

Lat, Long: 41.90972, -123.14278

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.


Satelite image of the Seiad Creek

Seiad Creek MRDS details

Site Name

Primary: Seiad Creek
Secondary: Mountain View
Secondary: Reddy No. 2
Secondary: Teddy Chrome
Secondary: Red Hills
Secondary: Valley View


Commodity

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


Location

State: California
County: Siskiyou


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: Rustless Mining Co.
Years: 1944 -

Owner Name: Kangaroo Mountain Chrome Co.
Years: 1944 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1914
Year Last Production: 1945
Discovery Year: 1915
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 LENSES AND STREAKS, DISSEMINATED


Structure

Type: L
Description: 3 Sets Of Complex Faults And Joints With Little Displacement


Alterations

Alteration Type: L
Alteration Text: Dunite Is Partly Serpentinized


Rocks

Name: Peridotite
Role: Associated
Age Type: Associated Rock
Age Young: Late Triassic

Name: Peridotite
Role: Associated
Age Type: Host Rock
Age Young: Late Triassic

Name: Peridotite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Triassic


Analytical Data

Analytical Data: RH=6-22 PPB. CR:FE=2.2-2.43:1
Analytical Data: RU=100-200 PPB
Analytical Data: IR=20 PPB
Analytical Data: PD=<1-34 PPB
Analytical Data: 7 PGE ANALYSES: PT=<1-120 PPB


Materials

Ore: Chromite
Gangue: Tremolite
Gangue: Talc
Gangue: Magnesite
Gangue: Chlorite
Gangue: Uvarovite
Gangue: Anthophyllite


Comments

Comment (Deposit): RECORD W017822 HAS BEEN MERGED AND DELETED.

Comment (Location): UNSURVEYED. IN KLAMATH NATIONAL FOREST. BETWEEN FORKS IN SEIAD CREEK

Comment (Development): MINE WAS IDLE BETWEEN WWI AND WWII

Comment (Deposit): MASSIVE ORE HAS BEEN MINED OUT. ORE OCCURRED IN 3 MAIN ZONES

Comment (Workings): 2 ADITS, NUMEROUS TRENCHES, 30 DIAMOND DRILL HOLES

Comment (Geology): DUNITE IS COMPOSED OF 95% OLIVINE AND 5% ENSTATITE. COUNTRY ROCK IS SCHISTOSE AND DUNITE IS FOLIATED.

Comment (Deposit): Discovery Year: WWI


References

Reference (Deposit): WELLS, F.G., AND CATER, F.W., JR., 1950, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 1, CH. 2, P. 118.

Reference (Deposit): WELLS, F.G., SMITH, C.T., RYNEARSON, G.H., AND LIVERMORE, J.S., 1949, CHROMITE DEPOSITS NEAR SEIAD AND MCGUFFY CREEKS, SISKIYOU COUNTY, CALIFORNIA: U.S. GEOLOGICAL SURVEY BULLETIN 948-B, P. 48-52.

Reference (Deposit): WEIBELT, F.J., AND RICKER, SPANGLER, 1949, INVESTIGATION OF THE SEIAD CREEK CHROMITE DEPOSITS, SISKIYOU COUNTY, CALIF.: U.S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4619, 28 P.

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.


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