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Modoc

Past Producer in Trinity county in California, United States with commodities Gold, Iron
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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. Mining district
  14. Land status
  15. Links to other databases
  16. Bibliographic references
  17. General comments
  18. Reporter information

Geologic information

Identification information

Deposit ID 10035900
MRDS ID M023851
Record type Site
Current site name Modoc
Alternate or previous names Wagner

Geographic coordinates

Geographic coordinates: -123.42502, 41.08873 (WGS84)
Elevation 1448
Relative position 2 MI. ENE TRINITY SUMMIT GUARD STATION

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Trinity Mountain(quadrangle 1:24,000 scale)

Hoopa(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
Humboldt 009N 007E 31 California

Comments on the location information

  • UTM EST. LAND UNSURVEYED FOR TOWNSHIP-RANGE. LOC. PROJECTED

Commodities

Commodity Importance
Gold Primary
Iron Secondary

Materials information

Materials Type of material
Gold Ore
Calcite Gangue
Iron Gangue
Quartz Gangue

Host and associated rocks

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

Nearby scientific data

(1) -123.42502, 41.08873
ListMap

Economic information

Ore body information

  • General form IRREGULAR SEAMS
    Strike NE, NW
    Dip SE

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • SERPENTINE CONTACT FEW HUNDRED FT. TO NE. MACDONALD (1912) DESCRIBES COUNTRY ROCK AS GRANODIORITE, CUT BY SMALL LAMPROPHYRE DIKES, MANY OF WHICH PARALLEL LODES AND SEVERAL OF WHICH FORM HANGING WALLS OF VEINS. FAULT(S) OFFSET VEIN(S) - SEE SKETCH MAP AND FURTHER DESCRIPTIONS IN MACDONALD (1912)

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1889

Mining district

District name New River

Land status

Ownership category National Forest

Comments on the production information

  • NO SPECIFIC PRODUCTION RECORD FOUND. SAID TO HAVE PRODUCED $20,000 ORE WAS FREE-MILLING & GOOD GRADE. SEVERAL POCKETS AND SMALL SHOOTS YIELDED $100/TON.

Comments on the workings information

  • 480 AND 160 FT. ADITS, 600 FT. OF DRIFTS AND STOPE (80 FT. BY 3 FT. BY 60 FT.) OTHER WORKINGS ON SMALLER VEINS.

Reference information

Bibliographic references

  • Deposit

    BROWN, G. CHESTER, 1913, THE COUNTIES OF SHASTA, SISKIYOU AND TRINITY: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 14, PT. 4, P. 895

  • Deposit

    CRAWFORD, J.J., 1896, THIRTEENTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, VOL. 13, P. 456

  • Deposit

    MACDONALD, D.F., 1912, GOLD LODES OF CARRVILLE DISTRICT, CA: U.S. GEOLOGICAL SURVEY BULL 530-D, P. 28-31

  • Production

    BROWN (1913)

General comments

Subject category Comment text
Deposit 20 ACRES. INCLUDED BLACK WARRIOR, MIZPAH VEINS, RED FLAG AND BRUSH BROTHERS CLAIMS. ; INFO.SRC : 1 PUB LIT
Deposit VEINS, ORE SHOOT 130 FT. LONG, 14 IN. THICK. CRAWFORD (1896) DESCRIBES SEAMS OF QUARTZ IN MATRIX OF DECOMPOSED SERPENTINE. ORE SHOOTS OCCUR WHERE NW-TRENDING CROSS FISSURES INTERSECT MAIN VEINS. LODES VARY FROM NARROW SHEARS TO BODIES SEVERAL FT. THICK. GOLD IN OXIDIZED ZONE WAS FREE AND OCCURRED WITH IRON OXIDES. BELOW THIS, IT WAS ASSOC. WITH PYRITE AND IN TELLURIDE FORM. SEE MACDONALD FOR MORE DETAILED DESCRIPTIONS.

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.

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.