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:
Lakeshore Mine (Casa Grande Mine; Trans Arizona Res. Inc. Mine; Treasure State Mine; Cyprus Casa Grande Mine; Tohono Mine; Cyprus Tohono Mine), North Komelik Area, Casa Grande District, Slate Mts, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USA

Oldest recorded age at locality: 66
Youngest recorded age at locality: 66

mindat Locality ID: 51058
mindat URL: http://www.mindat.org/loc-51058.html

Tectonic Settings:

Total number of sublocalities beneath "Lakeshore Mine (Casa Grande Mine; Trans Arizona Res. Inc. Mine; Treasure State Mine; Cyprus Casa Grande Mine; Tohono Mine; Cyprus Tohono Mine), North Komelik Area, Casa Grande District, Slate Mts, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 32°31'23"N
Longitude: 111°54'7"W
Decimal Degree (lat, lon): 32.523055555556,-111.90194444444

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 F Fe H K Mg Mo O Pb S Si Ti Zn 

Elements from minerals reported directly at this locality: Al C Ca Cl Cu F Fe H K Mg Mo O Pb S Si Ti Zn 

Structural Groups for minerals in this locality: 
AllophaneAmphiboleAtacamiteBrochantiteCalciteChalcopyriteClayCopperCorundumCovellite
DiasporeGypsumHumiteKaoliniteMicaMolybdeniteNoneNot in a structural groupOlivinePyrite
PyroxeneRocksaltRutileSphaleriteSpinel

29 IMA Minerals at location:
Anhydrite  (*)Atacamite  (*)Bornite  (*)Brochantite  (*)Calcite  (*)
Chalcocite  (*)Chalcopyrite  (*)Chondrodite  (*)Chrysocolla  (*)Copper  (*)
Covellite  (*)Cuprite  (*)Diopside  (*)Dioptase  (*)Forsterite  (*)
Galena  (*)Goethite  (*)Gypsum  (*)Hematite  (*)Kaolinite  (*)
Magnetite  (*)Molybdenite  (*)Muscovite  (*)Phlogopite  (*)Pyrite  (*)
Rutile  (*)Sphalerite  (*)Tenorite  (*)Tremolite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anhydrite  (*)Not in a structural groupCa(SO4)666601588
Atacamite  (*)AtacamiteCu2Cl(OH)366660544
Bornite  (*)NoneCu5FeS4666605516
Brochantite  (*)BrochantiteCu4(SO4)(OH)6666601633
Calcite  (*)CalciteCa(CO3)6666027770
Chalcocite  (*)NoneCu2S666605707
Chalcopyrite  (*)ChalcopyriteCuFeS26666027198
Chondrodite  (*)HumiteMg5(SiO4)2F266660285
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O666603531
Copper  (*)CopperCu666603846
Covellite  (*)CovelliteCuS666604165
Cuprite  (*)Not in a structural groupCu2O666602970
Diopside  (*)PyroxeneCaMgSi2O6666604135
Dioptase  (*)NoneCuSiO3·H2O66660164
Forsterite  (*)OlivineMg2(SiO4)666601188
Galena  (*)RocksaltPbS6666024243
Goethite  (*)DiasporeFeO(OH)666607437
Gypsum  (*)GypsumCa(SO4)·2H2O666606890
Hematite  (*)CorundumFe2O36666014640
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)4666605591
Magnetite  (*)SpinelFe2+Fe3+2O46666014899
Molybdenite  (*)MolybdeniteMoS2666605800
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)26666017380
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)2666602273
Pyrite  (*)PyriteFeS26666039462
Rutile  (*)RutileTiO2666605614
Sphalerite  (*)SphaleriteZnS6666021482
Tenorite  (*)NoneCuO666601101
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2666602562



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-00111666666      Brochantite, Chalcocite, Chalcopyrite, Covellite, Cuprite, Diopside, Magnetite, Pyrite, Tenorite, TremoliteCu51058Lakeshore Mine (Casa Grande Mine; Trans Arizona Res. Inc. Mine; Treasure State Mine; Cyprus Casa Grande Mine; Tohono Mine; Cyprus Tohono Mine), North Komelik Area, Casa Grande District, Slate Mts, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USALakeshoreSinger et al. (2008) USGSOFR2008_1155 


SampleSource LocalityReference URL


All locality data graciously provided by mindat.org

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