Mine detail: Midnight Test Mine

Previously called 'National Gold'

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Location: Yavapai County, Arizona, United States, North America
Lat / long: 34.47394, -112.40268
dep_id: 10026933
mrds_id: M001128
Commodity type: metallic
Major mineral: Gold
Minor mineral: Copper, Silver, Lead
Trace mineral: Zinc
Operation type: Unknown
Production size: Small ammount of material produced
Development status: Producer
ore: Galena, Gold, Sphalerite
gangue: Quartz
other_matl: Pyrite
orebody_fm: LENTICULAR
work_type: Underground
alteration: Minor
conc_proc: Oxidation At Near Surface
ore_ctrl: Faulting, Igneous Activity, Especially Dike Emplacment
Reporter: Gere, W., Johnson, Kris H. (Creasey, S.C.), Roth, Frances A. (Dewitt, Ed)
hrock_unit: Green Gulch Volcanics
hrock_type: Slate,Meta-Basalt,Rhyolite
arock_type: Rhyolite,Basalt
Structure: Foliation In Precambrian Rocks Trends N10e To N20e, Veins Parallel Foliation And Crosscut It By 10-20 Deg, Trending N20e To N-S
Year first produced: 1902
yr_lst_prd: 1935
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
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