Arizona · Pinal County
Producer

Grand Pacific Mine

Pinal County, Arizona, United States
CopperSilverGoldManganese
⌖ Show on mapUSGS source ↗
Description

John Sandal

Commodities
PrimaryCopper
SecondarySilver, Gold, Manganese
Commodity typeM
Deposit
Deposit sizeS
WorkingsUnderground
Orebody formLENTICULAR
Ore controlNe Trending Faults Crossing Escabosa Limestone, Fault Intersections
Materials
Ore mineralsCuprite
GangueCalcite, Pyrite, Quartz
Geology
Host rockLimestone · Escabosa Limestone;Martin Limestone
Associated rockDiabase
StructureNw Trending Fault Systems, Ne Trending Fault Systems, Nw Trending Iron Cap Fault, Ne Trending Sandal Fault
AlterationNear Surface Oxidation
Economic & production
Development statusProducer
First production1916
Last production1955
Discovery year1900
Identification
Deposit ID10048317
MRDS IDM899887
Alternate namesPacific Group, Pacific Mine
RegionNA
Data scoreB
Coordinates33.26981, -111.07098
References
ABGMT CLIPPINGS FILESABGMT-USBM FILE DATAUSBM FILESSHORT, M.N., GEOLOGY AND ORE DEPOSITS OF THE SUPERIOR MINING AREA, ARIZONA, 1943, ABM BULLETIN 151, P. 158FARNHAM, L.L., MANGANESE DEPOSITS OF EASTESRN ARIZONA, 1961, USBM IC 7990, P. 124, 126, 141RANSOME, F.L., DEPOSITS OF MANGANESE ORE IN ARIZONA, 1919, USGS 710 P 165