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:
Mildren Mine Group, Ko Vaya, Cababi District (Comobabi District), Comobabi Mts, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USA

Oldest recorded age at locality: 102
Youngest recorded age at locality: 98

mindat Locality ID: 35528
mindat URL: http://www.mindat.org/loc-35528.html

Tectonic Settings:

Total number of sublocalities beneath "Mildren Mine Group, Ko Vaya, Cababi District (Comobabi District), Comobabi Mts, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Mildren Extension Mine
Mildren Mine (Mildren Claim; Mildred Mine)
Steppe Mine (Steppe Claim; Little Mary Mine)

Latitude: 32°1'39"N
Longitude: 111°55'15"W
Decimal Degree (lat, lon): 32.0275,-111.92083333333
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: Ag Al Au Ba C Ca Cl Cr Cu F Fe H I K Mg Mo N O P Pb S Sb Si Sr V Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneAluniteApatiteAragoniteAtacamiteBaryteBrochantiteCalciteCaledoniteChalcopyrite
ClayConnelliteCopperDescloiziteDevillineDiasporeEpsomiteGypsumKaoliniteLepidocrocite
LinariteMalachiteMatlockiteMiniumMolybdeniteMonaziteNoneNot in a structural groupPhenakitePyrite
QuartzRocksaltScheeliteSphaleriteTetrahedriteWurtzite

53 IMA Minerals at location:
Anglesite  (*)Atacamite  (*)Azurite  (*)Baryte  (*)Bornite  (*)
Brochantite  (*)Buttgenbachite  (*)Calcite  (*)Caledonite  (*)Cerussite  (*)
Chalcocite  (*)Chalcopyrite  (*)Chlorargyrite  (*)Chrysocolla  (*)Copper  (*)
Crocoite  (*)Cuprite  (*)Devilline  (*)Dolomite  (*)Ferrimolybdite  (*)
Galena  (*)Goethite  (*)Gold  (*)Goslarite  (*)Gypsum  (*)
Hisingerite  (*)Iodargyrite  (*)Jarosite  (*)Leadhillite  (*)Lepidocrocite  (*)
Linarite  (*)Litharge  (*)Malachite  (*)Massicot  (*)Matlockite  (*)
Miersite  (*)Minium  (*)Molybdenite  (*)Mottramite  (*)Paratacamite  (*)
Pyrite  (*)Pyromorphite  (*)Quartz  (*)Rosasite  (*)Siderite  (*)
Smithsonite  (*)Sphalerite  (*)Stromeyerite  (*)Svanbergite  (*)Tetrahedrite-(Zn)  (*)
Vanadinite  (*)Willemite  (*)Wulfenite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anglesite  (*)BarytePb(SO4)102982144873,1448742734
Atacamite  (*)AtacamiteCu2Cl(OH)3102982144873,144874544
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)2102982144873,1448745509
Baryte  (*)BaryteBa(SO4)102982144873,14487411547
Bornite  (*)NoneCu5FeS4102982144873,1448745516
Brochantite  (*)BrochantiteCu4(SO4)(OH)6102982144873,1448741633
Buttgenbachite  (*)ConnelliteCu36(NO3)2Cl8(OH)62·nH2O102982144873,14487413
Calcite  (*)CalciteCa(CO3)10298114487327770
Caledonite  (*)CaledoniteCu2Pb5(SO4)3(CO3)(OH)6102981144873359
Cerussite  (*)AragonitePb(CO3)1029811448734979
Chalcocite  (*)NoneCu2S102982144873,1448745707
Chalcopyrite  (*)ChalcopyriteCuFeS210298114487427198
Chlorargyrite  (*)RocksaltAgCl102982144873,1448741382
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O102982144873,1448743531
Copper  (*)CopperCu102982144873,1448743846
Crocoite  (*)Monazite BarytePb(CrO4)102982144873,14487481
Cuprite  (*)Not in a structural groupCu2O102982144873,1448742970
Devilline  (*)DevillineCaCu4(SO4)2(OH)6·3H2O102981144874366
Dolomite  (*)NoneCaMg(CO3)2102982144873,1448749895
Ferrimolybdite  (*)NoneFe3+2(Mo6+O4)3·7H2O102982144873,144874345
Galena  (*)RocksaltPbS102982144873,14487424243
Goethite  (*)DiasporeFeO(OH)102982144873,1448747437
Gold  (*)CopperAu102982144873,14487430554
Goslarite  (*)EpsomiteZn(SO4)·7H2O102982144873,144874188
Gypsum  (*)GypsumCa(SO4)·2H2O102982144873,1448746890
Hisingerite  (*)Kaolinite ClayFe2Si2O5(OH)4·2H2O102982144873,144874144
Iodargyrite  (*)WurtziteAgI102982144873,144874180
Jarosite  (*)AluniteKFe3+3(SO4)2(OH)6102982144873,1448742228
Leadhillite  (*)NonePb4(SO4)(CO3)2(OH)2102982144873,144874265
Lepidocrocite  (*)LepidocrociteFe3+O(OH)102982144873,144874581
Linarite  (*)LinariteCuPb(SO4)(OH)2102981144873987
Litharge  (*)NonePbO102982144873,144874139
Malachite  (*)MalachiteCu2(CO3)(OH)210298114487312537
Massicot  (*)NonePbO102981144874202
Matlockite  (*)MatlockitePbClF10298114487329
Miersite  (*)SphaleriteAgI102982144873,14487410
Minium  (*)MiniumPb2+2Pb4+O4102981144873247
Molybdenite  (*)MolybdeniteMoS2102982144873,1448745800
Mottramite  (*)DescloizitePbCu(VO4)(OH)102982144873,144874362
Paratacamite  (*)AtacamiteCu3(Cu,Zn)Cl2(OH)6102981144873158
Pyrite  (*)PyriteFeS2102982144873,14487439462
Pyromorphite  (*)ApatitePb5(PO4)3Cl102982144873,1448741725
Quartz  (*)QuartzSiO2102982144873,14487461156
Rosasite  (*)MalachiteCuZn(CO3)(OH)2102982144873,144874454
Siderite  (*)CalciteFe(CO3)102982144873,1448746417
Smithsonite  (*)CalciteZn(CO3)102982144873,1448742473
Sphalerite  (*)SphaleriteZnS10298114487321482
Stromeyerite  (*)NoneCuAgS102982144873,144874332
Svanbergite  (*)AluniteSrAl3(SO4)(PO4)(OH)6102982144873,144874105
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S13102982144873,1448745317
Vanadinite  (*)ApatitePb5(VO4)3Cl102982144873,144874605
Willemite  (*)PhenakiteZn2SiO4102982144873,144874303
Wulfenite  (*)ScheelitePbMoO4102982144873,1448741655


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
Giersdorf_0000034810298100±2K-Ar  UAKA-73-49 Yes  35515Cababi District (Comobabi District), Comobabi Mts, Tohono O'odom (Papago) Indian Reservation, Pima Co., Arizona, USAPapago Indian ReservationShafiqullah et al. (1980) AGSD12_201Cretaceous sedimentary rocks are in disconformable contact with this intrusion

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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