Mine detail: Humboldt Mine

Previously called 'Liverpool TunnelPart of Arizona Copper Co Group'

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Location

Lat / long:

33.07871, -109.36676

Resource(M)

Primary:	Copper
Secondary:	Zinc
Ore:	Brochantite, Chalcocite, Chalcopyrite, Malachite, Pyrite, Sphalerite
Gangue:	Epidote, Garnet, Hematite, Limonite, Magnetite, Pyroxene, Sericite
Orebody form:	DISSEMINATED
Discovery year:	1892

Production

Operation type:	Unknown
Production size:	Medium
Development status:	Past Producer
First production started:	1892
Last production ended:	1932

Geology

Host rock:	Modoc Limestone;Morenci Shale;Longfellow Limestone
Host type:	Quartz Monzonite
Associated rock:	Morenci Granite Prophyry;Coronado Quartzite
Associated type:	Quartz Monzonite
Structure:	Ne Trending Fissure Veins Containing Rich Chalcocite Ore; Between The Humboldt Vein And Another Fissure Vein 200 Ft Distant Lies The Great Mass Of Concentrating Ore, Extensive Seam Impregnations Of The Country Rock Are Rarely Confined By Distinct Walls; Veins Cut Across Both Porphyry And Metamorphic Limestone; Vein Footwall Is Generally A Well-Defined Plane And Follows Porphyry Dikes In Some Places
Tectonic:	Complex Copper Mountain Fault System With Substantial Vertical Displacement; Fault Blocks Generally Downthrown To Ne; Copper Mountain Fault Cuts Across Humboldt Mine To Sw
Alteration processes:	Surface Oxidation Of Chalcocite Zone; Chalcocite Replace Pyrite

References

MRDS	M800409
DEP	10088900
Reference	{Deposit:: ABGMT-USBM FILE DATA.}{Deposit:: BLM DISTRICT SHEET 840.}{Deposit:: USGS PP 43, P. 270-276.}{Deposit:: STEVENS, H.J., 1911, THE COPPER HANDBOOK, VOL. X, PAGES 356-358, ARIZONA COPPER CO LTD.}{Deposit:: WATT, ROBERTA, 1956, HISTORY OF MORENCI ARIZONA: M.A. THESIS, UNIVERSITY OF ARIZONA, P. 39-40.}{Deposit:: ABGMT CLIPPINGS FILE, ARIZONA COPPER CO LTD.}{Deposit:: BENNETT, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, AZ: MS THESIS UNIV OF AZ, 153 P.}{Other Database:: CIMRI}
Reporter	Calder, Susan R.