Commodities
PrimaryGemstone, Semiprecious Gemstone, Quartz
SecondaryIron
Commodity typeB
Deposit
Deposit sizeY
Ore controlBrecciated Fault Zones
Materials
Ore mineralsAmethyst, Hematite, Specularite
Geology
Host rockQuartzite · Four Peaks (Mazatzal Group)
Associated rockGranite · Mazatzal Granite
StructureRoof Pendant Of Mazatzal Group Quartzite On Mazatzal Granite Folded Into A Syncline., Fault
Tectonic settingRemnant Of A Large Precambrian Thrust Sheet.
Economic & production
Development statusProducer
First production1942
Discovery year1925
Identification
Deposit ID10060269
MRDS IDTC10270
RegionNA
Data scoreB
Coordinates33.67257, -111.3321
References
LOWELL, J., 1976, MINERALIZATION OF THE FOUR PEAKS AMETHYST DEPOSIT, MARICOPA COUNTY, ARIZONA: MINERALOGICAL RECORD, MARCH-APRIL 1976, P. 72-77.JAEGER, F.P., 1985, A VISIT TO THE FOUR PEAKS AMETHYST MINE: GEMS AND MINERALS, NOV. 1985, P. 8-9, 48-49.ESTRAOA, L., J.J., 1987, GEOLOGY OF THE FOUR PEAKS AREA, ARIZONA: UNPUBLISHED M.S. THESIS, ARIZONA STATE UNIVERSITY, TEMPE, 76 P.PEIRCE, H.W., 1969, GEM MATERIALS, IN USGS, ABM, AND USBR, MINERAL AND WATER RESOURCES OF ARIZONA: ABM BULLETIN 180, USGS BULLETIN 871, P. 359.BLAIR, GERRY, 1992, THE ROCKHOUND'S GUIDE TO ARIZONA: HELENA, MONTANA, FALCON PRESS, 165 P.CIMRI