Grand National Mining Co

The Grand National Mining Co is a gold mine located in Trinity county, California at an elevation of 6,001 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: Grand National Mining Co

Commodity

Primary: Gold

Location

State: California
County: Trinity

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

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
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: Klamath Mountains

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Analytical Data: DIORITE IN SHEAR ZONE ASSAYED $3.50/TON IN GOLD

Materials

Gangue: Quartz

Comments

Comment (Workings): MAIN ADIT DRIVEN EAST FOR 700 FT. ON 4 FT. VEIN, THEN STRIKES SHEAR ZONE, STOPE, 100 FT. LONG AND 15 FT. WIDE WITH FACE 60 FT. ABOVE ADIT LEVEL. DRIFTS ON MAIN LEVEL, SHEAR ZONE LEVEL, TOTAL 300 FT. IN LENGTH. 100 FT. CROSSCUT INTO SHEAR ZONE AT 400 FT. DEPTH. 50 FT. WINZE BELOW ADIT-LEVEL ON SHEAR ZONE. SHORT SHOOT OF GOOD ORE WAS STOPED FROM THIS TO MAIN LEVEL.

Comment (Location): UTM ACC. SE 1/4 NE 1/4

Comment (Production): SHEAR ZONE WAS BEING MINED FOR GOLD IN 1937, NO SPECIFIC PRODUCTION RECORD FOUND

Comment (Deposit): SEVERAL VEINS, 1-4 FT. THICK WITH SHATTERED WHITE QUARTZ AND N-S SHEAR ZONE, 23 FT. WIDE AND DIPPING 70 E. AT SOUTH END OF WORKINGS OCCURS A 1 FT. THICK QTZ. VEIN STRIKING EAST INTO HANGING WALL OF SHEAR ZONE FOR 100 FT.

Comment (Geology): IN DRIFT TO NORTH OF MAIN ADIT, HANGING WALL OF SHEAR ZONE FORMED BY HORNBLENDE DIORITE.

Comment (Deposit): 240 ACRES, PATENTED ; INFO.SRC : 1 PUB LIT

References

Reference (Deposit): AVERILL, C.V., 1941, MINERAL RESOURCES OF TRINITY COUNTY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 37, NO. 1, P. 38

Reference (Deposit): SOUTHERN PACIFIC COMPANY, 1964, MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V2, P. 135

Reference (Production): AVERILL (1937)

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.