Mine detail: Critic Mine

Previously called 'Cunningham Pass'

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Location

Lat / long:

33.95727, -113.57633

Resource(B)

Primary:	Copper, Gold
Secondary:	Silver
Tertiary:	Barium-Barite, Iron
Ore:	Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Magnetite, Malachite
Gangue:	Barite, Hematite, Specularite
Orebody form:	IRREGULAR
Discovery year:	1865

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer
Production years:	1907-1953

Geology

Host type:	Schist,Gneiss,Granite
Associated type:	Granite
Structure:	The Width Of The Vein Varies From A Few Inches Up To 3 Or 4 Feet And The Ore-Bearing Streak Is Likewise As Inconstant In Its Dimensions, Changing Abruptly In Places From A Barren Vein Into Several Inches Of Ore And Again Pinching Out As Suddenly. This Is Probably Due To Post-Mineral Longitudinal Faulting, Both Horizontal And Vertical, Which Is Very Much In Evidence In The Property, With The Result That The Deposits Are Pinched In Several Places
Tectonic:	Basin And Range

References

MRDS	M003640
DEP	10027634
Reference	{Deposit:: BANCROFT, HOWLAND, 1911, ORE DEPOSITS IN NORTHERN YUMA COUNTY, ARIZONA: U.S.G.S. BULLETIN 451, P. 115.}{Deposit:: ELSING, M.J., HEINEMANN, R.E.S., 1936, ARIZONA METAL PRODUCTION: ARIZ. BUREAU OF MINES BULLETIN 140, P. 104.}{Deposit:: KEITH, S.B., 1978, INDEX OF MINING PROPERTIES IN YUMA COUNTY, ARIZONA; ARIZONA BUREAU OF MINES BULLETIN 192, P. 144}{Deposit:: PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.}{Deposit:: NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.}{Other Database:: CIMRI}{Production:: A.B.M. BULLETIN 140, P. 104. (10) KEITH, S.B., 1978.}
Reporter	Gere, W., Hall, R. K. (Creasey, S. C.), Orris, Greta J.