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April Fool Group

Past Producer in Elko county in Nevada, United States with commodities 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. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10045604
MRDS ID M233377
Record type Site
Current site name April Fool Group
Alternate or previous names Falcon, Ruby Silver, Rock Creek,

Geographic coordinates

Geographic coordinates: -116.39011, 41.35379 (WGS84)

Site location context

Political divisions (FIPS codes)

Elko(county)

Nevada(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Toe Jam Mountain(quadrangle 1:24,000 scale)

Tuscarora(quadrangle 1:100,000 scale)

McDermitt(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rock(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 Elko

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 040N 049E 13 Nevada

Commodities

Commodity Importance
Silver Primary
Gold Secondary

Materials information

Materials Type of material
Quartz Gangue

Alteration

  • (Local) Andesite Is Sericitized Near The Vein

Analytical data

Result PRODUCTION AVG. .35 OZ AU, & 428 OZ AG/TO

Mineral occurrence model information

Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene
    Stratigraphic age (youngest) Eocene

Nearby scientific data

(1) -116.39011, 41.35379
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Fault

Ore body information

  • General form TABULAR
    Thickness 1.52M

Controls for ore emplacement

  • Vertical Fault

Comments on the geologic information

  • ANDESITE IS CUT BY A NORTH-TRENDING VERTICAL FAULT, ALONG WHICH A QUARTZ VEIN WAS MINED FOR RUBY SILVER.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1879
Year of first production 1879

Comments on the production information

  • EARLY PRODUCTION (1800'S) IS UNRECORDED. AS THE APRIL FOOL GROUP IT PRODUCED 34 TONS AG IN 1928 AND 14 TONS AG IN 1950.

Comments on development

  • WORKED AS THE FALCON MINE FROM 1879 TO 1881. AS THE APRIL FOOL GROUP, THE PROPERTY PRDUCED 34 TONS SILVER IN 1928 AND 14 TONS AG IN 1950

Reference information

Bibliographic references

  • Deposit

    SMITH R.M. (1976-56) MINERAL RES. OF ELKO CO. NEV., USGS OPEN-FILE REPORT

  • Deposit

    ERNOMONS, W.H. (1910) RECONNAISSANCE OF ELKO, LANDER, & EUREKA CO., NEV, USGS BULL 408

  • Production

    SMITH, R.M. (1976)

General comments

Subject category Comment text
Deposit VEIN, CONTAINING RUBY SILVER; ALONG A FAULT ZONE 2-5 FT IN THICKNESS
Deposit WORKED AS THE FALCON MINE FROM 1879 TO 1881. AS THE APRIL FOOL GROUP THE PROPERTY PRODUCED 34 TONS OF SILVER IN 1928, AND 14 TONS IN 1950. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Kirkham, Richard A. Nevada Bureau of Mines and Geology

Beyond USGS

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

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.