Mineral Evolution Database
Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.
Mineral locality data provided by mindat.org



The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.


Locality Name:
Picacho District, Pinal Co., Arizona, USA

Oldest recorded age at locality: 1540
Youngest recorded age at locality: 23.62

mindat Locality ID: 207960
mindat URL: http://www.mindat.org/loc-207960.html

Tectonic Settings:

Total number of sublocalities beneath "Picacho District, Pinal Co., Arizona, USA": 36
Total number of bottom-level sublocalities: 25

Number of Child Localities: 2
Child Localities:
Picacho Basin
Picacho Mts

Latitude: 32°44'59"N
Longitude: 111°25'53"W
Decimal Degree (lat, lon): 32.749722222222,-111.43138888889
AThis mineral is Anthropogenic.
GThis mineral is directly dated.
BThis mineral is reported as having this age.
YThis mineral is using an age reported as an element mineralization period.
OThis mineral is using an age calculated from all data at the locality.
RThe age displayed for this mineral originates from a different, non-child locality.
PThe age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
This mineral's age has not yet been recorded.

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al C Ca Cl Cu Fe H K Na O S Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneAnalcimeChalcopyriteClayClinozoisiteCorundumEpidoteGypsumMalachiteMica
NoneNot in a structural groupPyriteRocksalt

14 IMA Minerals at location:
Analcime  (*)Anhydrite  (*)Azurite  (*)Chalcocite  (*)Chalcopyrite  (*)
Chrysocolla  (*)Epidote  (*)Gypsum  (*)Halite  (*)Hematite  (*)
Malachite  (*)Muscovite  (*)Pyrite  (*)Tenorite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Analcime  (*)AnalcimeNa(AlSi2O6)·H2O11458281627
Anhydrite  (*)Not in a structural groupCa(SO4)154012752145827,1458291588
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)211458485509
Chalcocite  (*)NoneCu2S11458335707
Chalcopyrite  (*)ChalcopyriteCuFeS225.0823.623145833,145835,14584427198
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O10145833,145836,145837,145838,145839,145840,145841,145842,145847,1458513531
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)25.0823.624145839,145840,145841,1458448173
Gypsum  (*)GypsumCa(SO4)·2H2O154012752145827,1458556890
Halite  (*)RocksaltNaCl154012753145827,145829,1458551398
Hematite  (*)CorundumFe2O39145833,145838,145848,145849,145850,145851,145852,145857,14586014640
Malachite  (*)MalachiteCu2(CO3)(OH)225.0823.6214145833,145835,145837,145842,145843,145844,145847,145848,145849,145850,145851,145852,145853,14586012537
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)225.0823.623145835,145843,14584417380
Pyrite  (*)PyriteFeS22145843,14585039462
Tenorite  (*)NoneCuO11458331101


3 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
USGS-Rb-Sr-04831127512751275Rb-Srage of metamorphic crystallizationwhole rock     107033Picacho Basin Gypsum-Salt Occurrence, Picacho Area, Picacho Basin, Picacho District, Pinal Co., Arizona, USA USGS-Rb-Sr USGS-Rb-Sr 
USGS-Rb-Sr-0483215401540154Rb-Srmaximum age of metamorphic crystallizationwhole rock     107033Picacho Basin Gypsum-Salt Occurrence, Picacho Area, Picacho Basin, Picacho District, Pinal Co., Arizona, USA USGS-Rb-Sr USGS-Rb-Sr 
Giersdorf_0000039525.0823.6224.35±0.73K-Ar  UAKA-73-64    130537Unnamed Copper Prospect (39), Granite Hills Area, Picacho Mts, Picacho District, Pinal Co., Arizona, USAPicacho MountainsShafiqullah et al. (1980) AGSD12_201 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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