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:
Casa Grande, Casa Grande District, Pinal Co., Arizona, USA

Oldest recorded age at locality: 71
Youngest recorded age at locality: 65

mindat Locality ID: 31936
mindat URL: http://www.mindat.org/loc-31936.html

Tectonic Settings:

Total number of sublocalities beneath "Casa Grande, Casa Grande District, Pinal Co., Arizona, USA": 12
Total number of bottom-level sublocalities: 9

Number of Child Localities: 2
Child Localities:
Casa Grande Area
Oro Negro Mining Company Properties

Latitude: 32°56'42"N
Longitude: 111°49'43"W
Decimal Degree (lat, lon): 32.945,-111.82861111111
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 Ca Cl Cu Fe H Hg K Mn Mo N O S Si Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneAtacamiteChalcopyriteClayCorundumCovelliteEpidoteMicaMolybdeniteNone
PhenakitePyrite

14 IMA Minerals at location:
Atacamite  (*)Bornite  (*)Chalcocite  (*)Chalcopyrite  (*)Chrysocolla  (*)
Cinnabar  (*)Corundum  (*)Covellite  (*)Molybdenite  (*)Muscovite  (*)
Nitrocalcite  (*)Piemontite  (*)Pyrite  (*)Willemite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Atacamite  (*)AtacamiteCu2Cl(OH)371651145324544
Bornite  (*)NoneCu5FeS4716511453245516
Chalcocite  (*)NoneCu2S716511453245707
Chalcopyrite  (*)ChalcopyriteCuFeS27165114532427198
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O716511453243531
Cinnabar  (*)NoneHgS11453232600
Corundum  (*)CorundumAl2O311453211797
Covellite  (*)CovelliteCuS716511453244165
Molybdenite  (*)MolybdeniteMoS2716511453245800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)27165114532417380
Nitrocalcite  (*)NoneCa(NO3)2·4H2O7165114531946
Piemontite  (*)EpidoteCa2(Al2Mn3+)[Si2O7][SiO4]O(OH)71651145319260
Pyrite  (*)PyriteFeS27165114532439462
Willemite  (*)PhenakiteZn2SiO41145322303


1 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
PorphCu-00116716571–65      Atacamite, Bornite, Chalcocite, Chalcopyrite, Chrysocolla, PyriteCu53925Santa Cruz Deposit (Casa Grande Santa Cruz Deposit; Francisco Grande Deposit; Fanny-Granny Deposit; Franny-Granny Deposit; Casa Grande; Casa Grande West), Casa Grande Area, Casa Grande, Casa Grande District, Pinal Co., Arizona, USACasa Grande WestSinger et al. (2008) USGSOFR2008_1155 

SampleSource LocalityReference URL

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