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Roff

Past Producer in Siskiyou 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. Economic information about the deposit and operations
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10103295
MRDS ID M023323
Record type Site
Current site name Roff
Alternate or previous names Cory Or Bridger

Geographic coordinates

Geographic coordinates: -122.8689, 41.36151 (WGS84)
Elevation 960
Relative position 1.5 MI. N SUMMIT OF SMITH HILL

Site location context

Political divisions (FIPS codes)

Siskiyou(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Callahan(quadrangle 1:24,000 scale)

Mount Shasta(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Scott(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Siskiyou

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 041N 009W 34,27 California

Comments on the location information

  • UTM SE 1/4 NW 1/4

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Analytical data

Result ASSAYED $9/TON IN GOLD FROM MILLING (GOLD AT $20/OZ) DIKE ASSAYED AT $1.50/TON IN GOLD (GOLD AT $20/OZ.). IN 50 FT. ADIT AT 30 FT. DEPTH, AVG. IS $0.80 AND FOR LAST 10 FT. IS $1. 0.44 OZ. AU REPORTED FROM PIT.

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) -122.8689, 41.36151
ListMap

Economic information

Ore body information

  • Strike N
    Dip 90
    Thickness 0.61M

Economic information about the deposit and operations

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

Comments on the production information

  • ORE HAULED TO MILL BELOW NO PRODUCTION RECORD FOUND

Comments on the workings information

  • 18 FT. SHAFT, 150 FT. DRIFT-ADIT 100 FT. LOWER. STOPE. 100 FT. BELOW ADIT IS 100 FT. CROSSCUT WITH 6 FT. OF DRIFTS. 120 FT BELOW IS A 320 FT. ADIT THOUGHT TO PARALLEL VEIN. 120 FT. ADIT ON NEXT CLAIM TO SOUTH WITH 100 FT. OF DRIFTS; VEIN WAS STOPED OUT TO SURFACE, 60 FT. ABOVE. SECOND CLAIM TO SOUTH HAS 520 FT. CROSSCUT ADIT THAT DIDN'T REACH VEIN-PRESUMABLY FROM VEIN OFFSET. ANOTHER ADIT TO SOUTH.

Reference information

Bibliographic references

  • Deposit

    AVERILL, C. V., 1935, MINES AND MINERAL RESOURCES OF SISKIYOU COUNTY, CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 31, NO. 3, P. 306 PL. 4

  • Deposit

    SOUTHERN PACIFIC COMPANY, 1964, MINERALS FOR INDUSTRY, NORTHERN CALIFORNIA, V2, P. 140

General comments

Subject category Comment text
Deposit VEIN, 18 IN. THICK IN SEC. 34. 50 FT. THICK DIKE IN SEC. 27
Deposit 1 PATENTED AND 3 UNPATENTED CLAIMS. 80 ACRES ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-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.