Commodities
PrimaryCopper
SecondaryGold, Silver
Commodity typeM
Deposit
Deposit typeVein
Deposit sizeS
WorkingsUnderground
Orebody formPOCKET
Ore controlHigh-Grade Malachite Ore Occurs In Pockets Along Ne-Trending Dike. Main Ore Body Was Found At A Corss Fracture To The Dike
Materials
Ore mineralsMalachite
GangueEpidote, Orthoclase, Quartz
Geology
Host rockGranite
Associated rockPlutonic Rock · Morenci Granite Porphyry;Precabrian Granite-Granodiorite Complex
StructureNe-Trending Narrow Porphyry Dikes In Coarse Reddish Quartzitic Granite; Veins Consist Of Many Very Sharply Defined Fissure Planes Striking Nne, Granite Country Rock Fragmented By Small Dike Of Basalt Or Andesite; Volcanic Dike Fractures Porphyry Dike Aout 15 Feet Below Surface
Tectonic settingCopper King Massif; Block Faulting Nw Of Massif With Downthrow Of About 1000 Ft
AlterationSurface Oxidation To Unknown Depths; Porphyry Greatly Bleached By Sericitization And Extensively Cemented By Quartz Veinlets
Economic & production
Development statusProducer
Discovery year1875
Identification
Deposit ID10026952
MRDS IDM001271
Alternate namesExpectation Group
RegionNA
Data scoreB
Coordinates33.12621, -109.33065
References
LINDGREN, 1905, USGS PROF PAPER 43, P. 362-263WEED, 1914, THE COPPER HANDBOOK, V. 11, P. 648, NEW ENGLAND AND CLIFTON COPPER COSTEVENS, 1911, THE COPPER HANDBOOK, V. 10, P. 1284-1285, NEW ENGLAND AND CLIFTON COPPER COBENNETT, 1975, GEOLOGY AND ORIGIN OF THE BRECCIAS IN THE MORENCI-METCALF DISTRICT, GREENLEE COUNTY, ARIZONA: M.S. THESIS UNIVERSITY OF ARIZONA, 153 P.