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Midnight Test Mine

Producer in Yavapai county in Arizona, United States with commodities Gold, Silver, Lead, Copper, Zinc
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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. 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. Reporter information

Geologic information

Identification information

Deposit ID 10026933
MRDS ID M001128
Record type Site
Current site name Midnight Test Mine
Alternate or previous names National Gold
Related records 10113729

Geographic coordinates

Geographic coordinates: -112.40268, 34.47394 (WGS84)
Elevation 2134
Relative position 2 MILES E OF GROOM CREEK

Site location context

Political divisions (FIPS codes)

Yavapai(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Groom Creek(quadrangle 1:24,000 scale)

Bradshaw Mountains(quadrangle 1:100,000 scale)

Prescott(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Agua Fria(hydrologic unit)

Lower Gila-Agua Fria(hydrologic accounting unit)

Lower Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Federal lands

Prescott National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Arizona Yavapai

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 013N 001W 30,31 Arizona

Comments on the location information

  • LOCATED ON NORTH SLOPE OF SPRUCE MOUNTAIN

Commodities

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

Materials information

Materials Type of material
Galena Ore
Gold Ore
Sphalerite Ore
Quartz Gangue
Pyrite Unknown

Alteration

  • (Local) Minor

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Mafic Volcanic Rock > Basalt
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Rock unit name Green Gulch Volcanics
    Rock description Green Gulch Volcanics
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Meta-Basalt
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite

Nearby scientific data

(1) -112.40268, 34.47394
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Foliation In Precambrian Rocks Trends N10e To N20e
Type of structure Local
Structure description Veins Parallel Foliation And Crosscut It By 10-20 Deg, Trending N20e To N-S

Ore body information

  • General form LENTICULAR
    Strike N 17 W
    Dip 80 W
    Width 0.61M

Controls for ore emplacement

  • Faulting, Igneous Activity, Especially Dike Emplacment

Comments on the geologic information

  • DEPOSIT IS QUARTZ VEIN WHICH CUTS PROTEROZOIC ROCKS

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1902
Year of last production 1935

Mining district

District name Groom Creek District

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner National Gold Co

Comments on the production information

  • ITEM ( 8 ) IS ESTIMATED FROM $ 75,000 PRODUCTION AT $ 20.67 PER OUNCE.

Workings at the site

  • Type of workings Underground
    Length 914.4M
    Overall depth 182.88M

Comments on the workings information

  • MAIN SHAFT LOCATED ON MIDNIGHT TEST CLAIM; NUMEROUS OTHER SHAFTS ON ADJOINING CLAIMS

Comments on development

  • 20 CLAIMS OF WHICH THE MAJOR PATENTED CLAIMS ARE THE MIDNIGHT TEST, DIXIE, AND SAXON

Reference information

Bibliographic references

  • Deposit

    WILSON, E.D., 1934 , ARIZONA LODE GOLD MINES AND GOLD MINING: ARIZONA BUREAU OF MINES BULLETIN 137 , P. 32

  • Deposit

    ELSING, M.J. AND HEINEMAN, R.E., 1936 , ARIZONA METAL PRODUCTION: ARIZONA BUREAU OF MINES BULLETINS 140 , P. 102

  • Deposit

    ARIZONA DEPT OF MINERAL RESOURCES FILE DATA

  • Deposit

    ABGMT CLIPPINGS FILES

  • Deposit

    ABGMT-USBM FILE DATA

  • Production

    A.B.M. BULLETIN 140 , P. 102

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1972 Gere, W. U.S. Geological Survey
Updater 01-MAR-1979 Johnson, Kris H. (Creasey, S.C.) U.S. Geological Survey
Updater 01-FEB-1982 Roth, Frances A. (Dewitt, Ed) 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 Arizona resources

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