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Grand National Mining Co

Past Producer in Trinity county in California, United States with commodity Gold
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10106546
MRDS ID X025895
Record type Site
Current site name Grand National Mining Co
Related records 10287772

Geographic coordinates

Geographic coordinates: -122.72944, 41.21262 (WGS84)
Elevation 1829
Relative position 0.8 MI. WNW LOG LAKE

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tangle Blue Lake(quadrangle 1:24,000 scale)

Mount Shasta(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Trinity(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Shasta-Trinity National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Trinity Alps Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Trinity

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 039N 008W 25 California

Comments on the location information

  • UTM ACC. SE 1/4 NE 1/4

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Quartz Gangue

Analytical data

Result DIORITE IN SHEAR ZONE ASSAYED $3.50/TON IN GOLD

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite

Nearby scientific data

(1) -122.72944, 41.21262
ListMap

Economic information

Ore body information

  • Dip 90
    Thickness 1.22M

Controls for ore emplacement

  • Basic Ore-Bearing Rock Occurs Along Shearing Planes In Host Rock

Comments on the geologic information

  • IN DRIFT TO NORTH OF MAIN ADIT, HANGING WALL OF SHEAR ZONE FORMED BY HORNBLENDE DIORITE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category National Forest

Comments on the production information

  • SHEAR ZONE WAS BEING MINED FOR GOLD IN 1937, NO SPECIFIC PRODUCTION RECORD FOUND

Comments on the workings information

  • 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.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    SOUTHERN PACIFIC COMPANY, 1964, MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V2, P. 135

  • Production

    AVERILL (1937)

General comments

Subject category Comment text
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.
Deposit 240 ACRES, PATENTED ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1980 Nelson, Scott C. (Albers, John, P.) U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.