Afterthought Mine

Past Producer in Owyhee county in Idaho, United States with commodities Gold, Silver
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. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10069893
MRDS ID W007654
Record type Site
Current site name Afterthought Mine

Geographic coordinates

Geographic coordinates: -116.69817, 42.99768 (WGS84)
Elevation 2219
Relative position 2 MILES SE OF SILVER CITY, ABOUT 2/3 OF A MILE SE OF WAR EAGLE MT

Site location context

Political divisions (FIPS codes)

Owyhee(county)

Idaho(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cinnabar Mountain(quadrangle 1:24,000 scale)

Triangle(quadrangle 1:100,000 scale)

Jordan Valley(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Snake-Succor(hydrologic unit)

Middle Snake-Boise(hydrologic accounting unit)

Middle Snake(hydrologic subregion)

Pacific Northwest(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management ID)

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

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Idaho Owyhee

Public Land Survey System information

Meridian Township Range Section Fraction State
Boise 005S 003W 09 Idaho

Comments on the location information

  • LOCATED BETWEEN TWO FORKS OF S FK SINKER CR NEAR HEAD OF STREAM; AND IS .75 MI SE OF SUMMIT OF WAR EAGLE MTN.; PREVIOUS QUAD DESIGNATION = BOISE 1:250000

Commodities

Commodity Importance
Gold Primary
Silver Primary

Materials information

Materials Type of material
Argentite Ore
Quartz Gangue

Alteration

  • (Local) Upper Levels Oxidized

Analytical data

Result ORE AVERAGES .14 OZ AU, 17.0 OZ AG TON ON 4TH LEVEL

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Silver City Granodiorite;Mio-Plio
    Rock description Silver City Granodiorite;Mio-Plio
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -116.69817, 42.99768

Economic information

Geologic structures

Type of structure Local
Structure description Brecciation, Fault, And Gouge

Ore body information

  • General form IRREGULAR
    Dip 85 DEG E
    Length 73.15M
    Width 1.83M

Controls for ore emplacement

  • Breccia Zone

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1900
Discoverer Delamar Mines Company

Mining district

District name French District

Land status

Ownership category BLM Administrative Area

Ownership information

  • Type Owner-Operator
    Owner Lee Mines Inc. ( 1970 )

Comments on the production information

  • TOTAL PRODUCTION ABOUT $460,000.

Workings at the site

  • Type of workings Surface/Underground
    Length 609.6M
    Overall depth 143.26M
    Overall length 30.48M

Comments on the workings information

  • 5 LEVELS

Comments on development

  • 1 PATENTED, 6 UNPATENTED CLAIMS, MILL SITE

Reference information

Bibliographic references

  • Deposit

    ASHER, R. R., 1968, GEOLOGY AND MINERAL RESOURCES OF A PORTION OF THE SILVER CITY REGION, OWYHEE CO. ID.: ID. BUREAU OF MINES AND GEOLOGY PAMPH 138, 106 P.

  • Deposit

    SALMAN, D.S.A., 1972, GEOLOGY OF TRIANGLE QUAD. AREA, OWYHEE COUNTY IDAHO: MOSCOW IDAHO, UNIV. OF IDAHO, M. S. THESIS, 65 P.

  • Deposit

    WALKER, W., 1965, GEOLOGY OF A PART OF THE OWYHEE MOUNTAIN SOUTH OF SILVER CITY, IDAHO: MOSCOW, IDAHO, UNIV. OF IDAHO, MS THESIS, 69 P.

  • Deposit

    1900 DIREXPL DELAMAR COMP 1900

  • Deposit

    1920 E. J. ORFORD (1920 - 1930)

  • Deposit

    1950 GEOLMAP MORD ELLO L. LEE (1950) { 1968 GEOLMAP IDAHO BUREAU OF MINES & GEOL. PAMPHLET 138

  • Production

    SALMAN, D.S.A., 1972, UNIV. OF IDAHO, M. S. THESIS, 65 P.

General comments

Subject category Comment text
Deposit VEIN PROBABLY S EXTENSION OF THE ORD FINO-GOLDEN CHARIOT VEIN
Deposit WORK WAS BEGUN ON DEWATERING THE SHAFT IN 1964

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1975 Benjamin, David A. U.S. Geological Survey

Beyond USGS

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

External references