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Knob Group

Past Producer in Inyo county in California, United States with commodities Gold, Silver, Copper, Lead, 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. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10106509
MRDS ID X023795
Record type Site
Current site name Knob Group
Alternate or previous names Anthony and Gold Bug, Post Office Springs Mine

Geographic coordinates

Geographic coordinates: -117.16006, 36.0222 (WGS84)
Elevation 1387
Relative position 4 MI ESE BALLARAT IN PLEASENT CANYON

Site location context

Political divisions (FIPS codes)

Inyo(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ballarat(quadrangle 1:24,000 scale)

Darwin Hills(quadrangle 1:100,000 scale)

Death Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Panamint Valley(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Inyo

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 022S 045E 18,19 California

Comments on the location information

  • UTM ACC LAND UNSURVEYED

Commodities

Commodity Importance
Gold Primary
Silver Primary
Copper Secondary
Lead Secondary
Iron Tertiary

Materials information

Materials Type of material
Gold Ore
Hematite Ore
Pyrite Ore
Quartz Gangue

Analytical data

Result 18-IN OF ORE FROM STOPE ASSAYED $60/TON

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -117.16006, 36.0222
ListMap

Economic information

Ore body information

  • General form HONEYCOMBED
    Strike N10W
    Dip 40-45SW
    Thickness 1.07M

Controls for ore emplacement

  • Intersections Of Veins With Fractures And Where Footwall Stringers Most Numerous

Comments on the geologic information

  • ROCK EXPOSED 600-700 FT. ABOVE BED OF CANYON IS SCHIST THAT HAS BEEN INTENSIVELY FOLDED. 400-500 FT OF BROWN, CRYSTALLINE LIMESTONE RESTS ON TOP OF SCHIST.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1893

Comments on the production information

  • NO OTHER PRODUCTION RECORD FOUND 16-18 IN OF ORE CARRIED $40/TON

Comments on the workings information

  • ON NORTH END: NUMBER OF SHORT TUNNELS AND 2 SMALL STOPES. ON SOUTH END: 50-FT. STOPE THAT WAS 20-FT. DEEP. 100 FT. BELOW STOPE, ADIT DRIVEN FOR 100 FT. ON VEIN STOPE 40 FT. LONG, 30 FT. HIGH AND 2.5 FT. WIDE WAS WORKED FORM THIS TUNNEL. SOUTH END OF OLD GOLD BUG NO.1 CLAIM, 2500 FT. S OF DESCRIBED WORKINGS, CONSISTED OF SHORT TUNNELS AND 40-FT. INCLINE. ON 20-FT. LEVEL, 30 FT. DRIFT TO NORTH, AND 30 FT. TO SOUTH. BELOW SOUTH DRIFT, STOPE 20-FT. LONG BY 2.5 FT. WIDE. BOTTOM OF STOPE TAPPED BY RAISE FROM BOTTOM OF INCLINE, MILLSITE.

Reference information

Bibliographic references

  • Deposit

    NORMAN, L.A. JR. AND STEWART, RICHARD M., 1951, MINES AND MINERAL RESOURCES OF INYO COUNTY: CALIF. JOURNAL OF MINES AND GEOLOGY V.47, NO. 1 P. 45

  • Deposit

    SAMPSON, R.I., 1932, MINERAL RESOURCES OF A PART OF THE PANAMINT RANGE: CALIF. JOUR. MINES AND GEOLOGY, V.28, P. 368-369

  • Deposit

    GOODWIN, J.G., 1957, LEAD AND ZINC IN CALIFORNIA: CALIFORNIA JOURNAL OF MINES AND GEOLOGY, V. 53, NOS. 3 & 4, P. 482

  • Deposit

    CRAWFORD, J.J., 1894, REPORT OF THE STATE MINERALOGIST: CALIF. JOUR. MINES AND GEOLOGY, V. 12, P. 139-140

  • Production

    NORMAN AND STEWART (1951), GOODWIN (1957)

General comments

Subject category Comment text
Deposit INTERLACING VEIN SYSTEM, ONE SERIES WITH SOUTHWEST DIP, OTHER WITH EASTERLY DIP THAT INTERSECTS MAIN VEIN AS EXPOSED IN FACE OF CLIFF. THIRD SERIES OF SUBORDINATE FRACTURES STRIKE NW DIP STEEPLY SE AND FORM JUNCTIONS WITH MAIN VEIN FROM FOOTWALL SIDE, BUT DO NOT CROSS VEIN INTO HANGING WALL. MAIN VEIN TRACED FOR 0.5 MI. TO SOUTH FROM FACE OF CLIFF, VARIES FROM FEW IN.-3.5 FT. IN THICKNESS. FAINT TRACE OF COPPER SULFATE STAINING SEEN ON MOST OF ORE. HIGHEST GRADE ORE IN BANDS OF HEMATITE AND WHITE TO IRON-STAINED POROUS QUARTZ IN HEMATITE. ORE WAS GENERALLY HIGH-GRADE.
Deposit 2 UNPATENTED CLAIMS, KNOB NO. 1 AND NO. 2. INCORPORATED EARLIER CLAIMS UNDER DIFFERENT NAMES ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-DEC-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.