Mine detail: Midnight Test Mine

Previously called 'National Gold'

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Location

Lat / long:

34.47394, -112.40268

Resource(M)

Primary:	Gold
Secondary:	Copper, Silver, Lead
Tertiary:	Zinc
Ore:	Galena, Gold, Sphalerite
Gangue:	Quartz
Orebody form:	LENTICULAR
Other material:	Pyrite

Production

Operation type:	Unknown
Production size:	Small
Development status:	Producer
First production started:	1902
Last production ended:	1935

Geology

Host rock:	Green Gulch Volcanics
Host type:	Slate,Meta-Basalt,Rhyolite
Associated 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
Alteration processes:	Minor

References

MRDS	M001128
DEP	10026933
Reference	{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	Gere, W., Johnson, Kris H. (Creasey, S.C.), Roth, Frances A. (Dewitt, Ed)