Description
W.L. Ryerson, John Swisshelm, Jim Bullard, Joe Yankie
Commodities
PrimaryCopper
SecondaryIron
TertiaryGypsum-Anhydrite
Commodity typeB
Deposit
Deposit typeContact Metamorphic
Deposit sizeS
WorkingsSurface/Underground
Orebody formTABULAR
Ore controlIrregular And Tabular Deposits Of Very Rich Oxidized Ores Along Contact Between Limestone And Porphyry, And Between Porphyry Dikes; Occur In Limestone And Shale As 5 More Or Less Regular Beds And Are Truncated By The Copper Mountain Fault
Materials
Ore mineralsBrochantite, Chalcocite, Chalcopyrite, Cuprite, Gypsum, Malachite, Pyrite
GangueEpidote, Kaolin, Limonite, Pyroxene
Geology
Host rockShale,Limestone · Modoc Limestone;Morenci Shale
Associated rockQuartz Monzonite,Plutonic Rock · Morenci Granite Porphyry;Coronado Quartzite
StructureCopper Mountain Fault Separates Rich Disseminated Chalcocite Ore From Barren Porphyry, Ore Bodies Are Contained Between 2 Porphyry Dikes About 400 To 500 Ft Apart (Joy Dike And Hummingbird Dike)
Tectonic settingComplex Copper Mountain Fault System With Substantial Vertical Displacement. Fault Blocks Generally Downthrown To Ne.
AlterationOxidation To Depths Of 400 Ft, Facilitated By Richness Of Sulfides In Ore Body And Good Exposure To Percolating Waters; Modoc Limestone Has Been Greatly Altered To Heavy Garnet
Economic & production
Development statusPast Producer
First production1882
Last production1920
Discovery year1872
Identification
Deposit ID10104152
MRDS IDM800423
Alternate namesCopper Mountain Claim Working, Old Blue Shaft, Detroit Copper Co. Group
RegionNA
Data scoreB
Coordinates33.07454, -109.36593
References
ABGMT-USBM FILE DATABLM DISTRICT SHEET 840.ARIZONA BUREAU OF MINES BULLETIN 149, P. 15.WATT, ROBERTA, 1956, HISTORY OF MORENCI ARIZONA, M.A. THESIS, UNIVERSITY OF ARIZONABENNETT, K-C, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, ARIZONA: TUCSON, ARIZONA, M.S. THESIS, UNIVERSITY OF ARIZONA, 153 P.CIMRI