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Fallon Eagle Mine

Past Producer in Churchill county in Nevada, United States with commodities Gold, Silver, Arsenic, Boron-Borates, Copper
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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. Mining district
  16. Land status
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10043732
MRDS ID M231004
Record type Site
Current site name Fallon Eagle Mine
Alternate or previous names Midas Claims, NBMG Sample Sites 2646, 2647.

Geographic coordinates

Geographic coordinates: -118.88848, 39.80546 (WGS84)
Elevation 1341
Relative position ABOUT 1/2 MILE SOUTHWEST OF CINNABAR HILL PEAK

Site location context

Political divisions (FIPS codes)

Churchill(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Desert Peak(quadrangle 1:24,000 scale)

Carson Sink(quadrangle 1:100,000 scale)

Reno(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Humboldt(hydrologic unit)

Humboldt(hydrologic accounting unit)

Black Rock Desert-Humboldt(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management NV)

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

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Nevada Churchill

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 022N 028E 06 Nevada

Commodities

Commodity Importance
Gold Primary
Silver Primary
Arsenic Critical Tertiary
Boron-Borates Tertiary
Copper Tertiary

Materials information

Materials Type of material
Calcite Gangue
Chlorite Gangue
Epidote Gangue
Quartz Gangue

Alteration

  • (Local) Diorite Wallrock Is Moderately Kaolinized, Silicified,Near Vein; Chloritization

Analytical data

Result 700 PPM AG. 1293 PPM AU. SAMPLE 2646, A DUMP SAMPLE OF HEMATITE- AND MNO-STAINED BRECCIATED QUARTZ-CALCITE VEIN MATERIAL CONTAINS 7 % FE,- 0.03% MG, 3% CA, 0.015 % TI, 1000 PPM MN, 30 PPM AG, 500 PPM -AS, 20 PPM AU, 500 PPM B, 100 PPM BA, 50 PPM BI, 20 PPM CR, 30-0 PPM CU, 30 PPM LA, 200 PPM PB, 200 PPM SB, 100 PPM V, 10 PPM- ZR, AND AA ANAYSIS SHOWS 19.0 PPM AU. SAMPLE 2647 FROM OUTCRO-P OF HEMATITE AND MNO-STAINED BRECCIATED QUARTZ VEIN MATERIAL -AND SOME PYRITE IN SILICIFIED DIORITE WALLROCK ALONG VEIN, CONTAINS 10 % FE, 0.2 % MG, 1.5 % CA, 0.1 % TI, 1000 PPM MN, 3 PP-M AG, 700 PPM AS, 0.4 PPM AU (AA), +2000 PPM B, 150 PPM BA, 1 -PPM BE, 10 PPM BI, 10 PPM CO, 20 PPM CR, 300 PPM CU, 7 PPM MO,- 30 PPM NI, 200 PPM PB, 150 PPM SB, 7 PPM SC, 100 PPM V, 20 PP-M Y, 50 PPM ZR.

Mineral occurrence model information

Model code 85
USGS model code 22c
Deposit model name Polymetallic veins
Mark3 model number 46

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Jurassic

Nearby scientific data

(1) -118.88848, 39.80546
ListMap

Economic information

Ore body information

  • Strike N40W
    Dip 20-55SW
    Thickness 0.91M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • MINE IS DEVELOPED BY ONE VERTICAL AND FOUR INCLINED SHAFTS. DUMP MATERIAL IS MOSTLY DIORITE WITH SOME IRON-STAINED QUARTZ IS FOUND ON THE DUMP OF THE DEEPEST INCLINED SHAFT. THE DIORITE COULD NOT BE OBSERVED IN PLACE BECAUSE THE AREA IS COVERED WITH ALLUVIUM, AND THE ATTITUDE OF THE QUARTZ VEIN IS NOT KNOWN. THE VEIN QUARTZ ON THE DUMP CONTAINED 700 PPM SILVER AND 1293 PPM GOLD (WILLDEN AND SPEED, P 67).

Economic information about the deposit and operations

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

Mining district

District name Desert District

Land status

Ownership category BLM Administrative Area

Comments on the workings information

  • 2 VERTICAL SHAFTS, ONE INCLINE, PITS, TRENCHES (1985)

Comments on development

  • ONE OF THE OLDEST MINES IN THE DISTRICT (INACTIVE)

Reference information

Bibliographic references

  • Deposit

    WILLDEN, RONALD, AND SPEED, R C, 1974, GEOLOGY AND MINERAL DEPOSITS OF CHURCHILL COUNTY, NEVADA: NBMG BULL 83.

  • Deposit

    TINGLEY, J. V., FIELD EXAMINATION 2/26/85 AND SAMPLE ANALYSIS

General comments

Subject category Comment text
Deposit QUARTZ-CALCITE VEINS IN SHEAR ZONE IN DIORITE. IN OUTCROP VEIN IS ABOUT 3 FT THICK, BRECCIATED AND CEMENTED WITH H-EMATITE AND MN OXIDES. SMALL QUARTZ VEINS LACE DIORITE NEAR TH-E MAIN VEINS. THERE APPEAR TO BE AT LEAST 2 PARALLEL VEINS, ON-E PASSING THROUGH THE FALLON EAGLE SHAFT, WHICH STRIKES N40W,D-IPS 20 SW, AND A PARALLEL VEIN ABOUT 200 FT TO THE WEST STRIKI-NG N40W, DIP 55 SW. THE VEINS ARE 2-3 FT THICK AND APPEAR TO B-E LESS BRECCIATED TO THE SE OF THE MAIN SHAFTS. THE DIORITE WA-LLROCK IS LIGHT TO DARK GREEN DUE TO THE PRESENCE OF CHLORITE -(REPLACING ORIGINAL BIOTITE). FRACTURE SURFACES IN THE DIORITE- ARE COATED WITH EPIDOTE. VEINS ARE CONTAINED WITHIN THE DIORI-TE, BUT THE SURROUNDING HILLS ARE CAPPED BY LATER TUFFS AND BA-SALTS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1980 Flynn, Patricia Dodd Nevada Bureau of Mines and Geology
Updater 01-SEP-1985 La Pointe, D.D. (Tingley, J.V.) Nevada Bureau of Mines and Geology

Beyond USGS

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

External references

Maps centered on this site

Authoritative Nevada resources

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