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Blue Moon

Past Producer in Mariposa county in California, United States with commodities Zinc, Copper, Lead, Silver, 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. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10102860
MRDS ID M009395
Record type Site
Current site name Blue Moon
Alternate or previous names Blue Cloud, Red Cloud, Percupine
Related records 10212289

Geographic coordinates

Geographic coordinates: -120.25655, 37.56603 (WGS84)
Relative position 6 MILES NORTH OF HORNITOS

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Merced Falls(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(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 Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 016E 19,30 California

Commodities

Commodity Importance
Zinc Critical Primary
Copper Primary
Lead Secondary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Chalcocite Ore
Chalcopyrite Ore
Galena Ore
Malachite Ore
Pyrite Ore
Sphalerite Ore
Tetrahedrite Ore
Barite Gangue
Calcite Gangue
Hematite Gangue
Limonite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Silicification, Sericitization, Pyritization, Chloritization. 2500 Ft Long, 800 Ft Wide.

Analytical data

Result ORE IN MAIN OR NO. 1
Result 13.1 % ZN, .36 % CU, .47 % PB, .061 OZ/TON AU, 3.75 OZ/TON AG.

Mineral occurrence model information

Model code 184
USGS model code 28a
Deposit model name Massive sulfide, kuroko
Mark3 model number 93

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite
  • Host or associated Associated
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Arkose
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.25655, 37.56603
ListMap

Economic information

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Shear Zones

Comments on the geologic information

  • GEOL.DESC: MINERALIZED ZONE IN METAVOLCANICS OF PENON BLANCO FORMATION OF UPPER JURASSIC AMADOR GROUP. TRENDS N 10 - 20 W, DIPPING STEEPLY EAST. FELSITIC GREENSTONE AND GREENSTONE TUFF - BRECCIA ARE PRINCIPAL ROCK TYPES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1935
Year of first production 1935
Year of last production 1945
Production years 1935, 1944 - 1945

Ownership information

  • Type Operator
    Owner Hecla Mining Co.
    First year 1945

Comments on the production information

  • 1945 MINE ABANDONED BECAUSE OF CAVING. COPPER PRODUCED IN 1935 AND 1942 ALSO.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 152.4M

Comments on the workings information

  • PRINCIPAL WORKINGS; 500 FT. SHAFT, NO. 2 INCLINED 80 DEG. W, LEVELS AT 125 , 165 , 275 , 385 , 450 FT. 200 FT. OF DRIFTS AND SUBSIDIARY WORKINGS ON 125 - LEVEL, 600 FT. OF WORKINGS ON 165 - LEVEL, 250 FT. WORKINGS ON 275 - LEVEL, 225 FT. WORKINGS ON 385 - LEVEL AND 150 FT. WORKINGS ON 450 - LEVEL. 250 FT. SOUTH IS NO. 1 SHAFT 35 FT. DEEP CONNECTED TO MAIN WORKINGS BY RAISE. SEVERAL OPEN CUTS, 2 OVER 100 FT. LONG. MAIN SHAFT, ADJOING WORKINGS CAVED.

Reference information

Bibliographic references

  • Deposit

    BOWEN, O. E. AND CLIFFTON, G. H., 1957 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY, CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NO. 1 & 2 , P. 200 - 202 .

  • Deposit

    ERIC, J. H. AND COX, M. W., 1948 , ZINC DEPOSITS OF THE AMERICAN EAGLE - BLUE MOON AREA, MARIPOSA COUNTY, CALIFORNIA; COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 144 - 150 .

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V. 53, NOS.3 & 4, P. 547; ADD. REF.: DMPA APPL'N 2162 - SIERRA ZINC INC. - REPORTED MAY, 1952 BY WEHELT - DMEA INDEX -CALIF. NEV. P. 9

  • Production

    ERIC, J. H., AND COX, M. W., 1948 , P. 145 (SEE REF.)

General comments

Subject category Comment text
Deposit THREE OUTCROPPING MINERALIZED ZONES. NO. 1 IS LENTICULAR, STRIKES N 15 E, DIPS 48 - 87 W, IT IS IRREGULAR WITH MAXIMUM WIDTH 38 FT., STRIKE LENGTH 180 FT., WORKED TO DEPTH OF 450 FT. NO. 2 , 10 FT. FROM NO. 1 AND PARALLELS IT, AVG. WIDTH 5 FT., STRIKE LENGTH 80 FT. AT 165 FT. LEVEL, PINCHES OUT ABOVE AND BELOW 165 FT. LEVEL. NO. 3 , 40 FT. FROM NO. 1 , STOPE LENGTH 50 - 80 FT., WIDTH 4 - 9 FT., STRIKES N 5 E, DIPS 80 W, IT EXTENDS BELOW 165 FT. LEVEL.
Deposit Discovery Year: 1930S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-JUN-1978 Fraticelli, L. A. (Albers, J.) 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.