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:
Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA

Oldest recorded age at locality: 63
Youngest recorded age at locality: 63

mindat Locality ID: 3369
mindat URL: http://www.mindat.org/loc-3369.html

Tectonic Settings:

Total number of sublocalities beneath "Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Ajo Consolidated Mine
Ajo Cornelia Mine
Ajo Peak Mine
Cardigan Mine
Cornelia Arroyo
Cornelia Group
New Cornelia Mine (Ajo Mine)
New Cornelia Mine Area (Ajo Mine Area)

Latitude: 32°20'55"N
Longitude: 112°52'20"W
Decimal Degree (lat, lon): 32.348611111111,-112.87222222222

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The 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.

Adelite	Ajoite	Allophane	Alunite	Amorphous	Andalusite	Apatite	Atacamite	Baryte	Brochantite
Brookite	Calcite	Chalcopyrite	Chlorite	Clay	Clinozoisite	Connellite	Copper	Corundum	Covellite
Descloizite	Devilline	Diaspore	Enargite	Epidote	Epsomite	Feldspar	Ferrierite	Gillespite	Gypsum
Kaolinite	Malachite	Melanterite	Mica	Molybdenite	None	Not in a structural group	Olivine	Palygorskite	Plancheite
Pyrite	Pyrochlore	Pyroxene	Quartz	Rocksalt	Rutile	Smectite-vermiculite	Sphalerite	Spinel	Sulphur
Talc	Tetrahedrite	Titanite	Turquoise	Wurtzite	Zircon

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 As Au Ba C Ca Cl Co Cu F Fe H K Mg Mn Mo Na O P Pb S Sb Si Ti U V Zn Zr

Elements from minerals reported directly at this locality: Ca Cu Mg O Si

Structural Groups for minerals in this locality:
Adelite Ajoite Allophane Alunite Amorphous Andalusite Apatite Atacamite Baryte Brochantite
Brookite Calcite Chalcopyrite Chlorite Clay Clinozoisite Connellite Copper Corundum Covellite
Descloizite Devilline Diaspore Enargite Epidote Epsomite Feldspar Ferrierite Gillespite Gypsum
Kaolinite Malachite Melanterite Mica Molybdenite None Not in a structural group Olivine Palygorskite Plancheite
Pyrite Pyrochlore Pyroxene Quartz Rocksalt Rutile Smectite-vermiculite Sphalerite Spinel Sulphur
Talc Tetrahedrite Titanite Turquoise Wurtzite Zircon

87 IMA Minerals at location:

Ajoite ()*	Albite ()*	Allophane ()*	Alunite ()*	Anatase ()*
Anhydrite ()*	Ankerite ()*	Atacamite ()*	Augite ()*	Aurichalcite ()*
Azurite ()*	Baryte ()*	Beidellite ()*	Bieberite ()*	Bornite ()*
Brochantite ()*	Brookite ()*	Calcite ()*	Chalcocite ()*	Chalcopyrite ()*
Chamosite ()*	Chrysocolla ()*	Clinochlore ()*	Conichalcite ()*	Connellite ()*
Copper ()*	Covellite ()*	Cuprite ()*	Cuprorivaite ()*	Devilline ()*
Diaspore ()*	Dolomite ()*	Enargite ()*	Enstatite ()*	Epidote ()*
Epsomite ()*	Ferrierite-Na ()*	Fluorapatite ()*	Forsterite ()*	Galena ()*
Goethite ()*	Gold ()*	Gypsum ()*	Halite ()*	Hematite ()*
Ilmenite ()*	Jarosite ()*	Kaolinite ()*	Laumontite ()*	Magnetite ()*
Malachite ()*	Melanterite ()*	Meta-alunogen ()*	Microcline ()*	Molybdenite ()*
Mottramite ()*	Muscovite ()*	Neotocite ()*	Nontronite ()*	Olivenite ()*
Opal ()*	Orthoclase ()*	Palygorskite ()*	Papagoite ()*	Phlogopite ()*
Plancheite ()*	Planerite ()*	Posnjakite ()*	Pseudomalachite ()*	Pyrite ()*
Pyrolusite ()*	Quartz ()*	Rutile ()*	Shattuckite ()*	Siderite ()*
Silver ()*	Sphalerite ()*	Stibiconite ()*	Sulphur ()*	Talc ()*
Tennantite-(Fe) ()*	Tenorite ()*	Tetrahedrite-(Zn) ()*	Titanite ()*	Torbernite ()*
Turquoise ()*	Zircon ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Ajoite ()*	Ajoite	K₃Cu²⁺₂₀Al₃Si₂₉O₇₆(OH)₁₆·8H₂O	63	63	1	143447	11
Albite ()*	Feldspar	Na(AlSi₃O₈)	63	63	1	143447	8803
Allophane ()*	Allophane	Al₂O₃(SiO₂)_1.3-2.0·2.5-3.0H₂O	63	63	1	143447	470
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆	63	63	2	143447,143448	966
Anatase ()*	Not in a structural group	TiO₂	63	63	1	143447	2162
Anhydrite ()*	Not in a structural group	Ca(SO₄)	63	63	1	143447	1588
Ankerite ()*	None	Ca(Fe²⁺,Mg)(CO₃)₂	63	63	2	143444,143447	3092
Atacamite ()*	Atacamite	Cu₂Cl(OH)₃	63	63	1	143447	544
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	63	63	1	143447	2060
Aurichalcite ()*	None	(Zn,Cu)₅(CO₃)₂(OH)₆	63	63	1	143447	919
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	63	63	1	143447	5509
Baryte ()*	Baryte	Ba(SO₄)	63	63	3	143444,143447,143448	11547
Beidellite ()*	Clay Smectite-vermiculite	(Na,Ca)_0.3Al₂(Si,Al)₄O₁₀(OH)₂·nH₂O	63	63	1	143447	85
Bieberite ()*	Melanterite	Co(SO₄)·7H₂O	63	63	1	143447	50
Bornite ()*	None	Cu₅FeS₄	63	63	1	143447	5516
Brochantite ()*	Brochantite	Cu₄(SO₄)(OH)₆	63	63	1	143447	1633
Brookite ()*	Brookite	TiO₂	63	63	1	143447	700
Calcite ()*	Calcite	Ca(CO₃)	63	63	1	143447	27770
Chalcocite ()*	None	Cu₂S	63	63	3	143441,143442,143447	5707
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	63	63	1	143447	27198
Chamosite ()*	Chlorite Clay	(Fe²⁺,Mg,Al,Fe³⁺)₆(Si,Al)₄O₁₀(OH,O)₈	63	63	1	143447	577
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	63	63	1	143447	3531
Clinochlore ()*	Chlorite Clay	Mg₅Al(AlSi₃O₁₀)(OH)₈	63	63	1	143447	1756
Conichalcite ()*	Adelite	CaCu(AsO₄)(OH)	63	63	1	143447	363
Connellite ()*	Connellite	Cu₃₆(SO₄)(OH)₆₂Cl₈·6H₂O	63	63	1	143447	295
Copper ()*	Copper	Cu	63	63	1	143447	3846
Covellite ()*	Covellite	CuS	63	63	1	143447	4165
Cuprite ()*	Not in a structural group	Cu₂O	63	63	1	143447	2970
Cuprorivaite ()*	Gillespite	CaCuSi₄O₁₀	63	63	0		8
Devilline ()*	Devilline	CaCu₄(SO₄)₂(OH)₆·3H₂O	63	63	1	143447	366
Diaspore ()*	Diaspore	AlO(OH)	63	63	1	143447	481
Dolomite ()*	None	CaMg(CO₃)₂	63	63	1	143447	9895
Enargite ()*	Enargite Wurtzite	Cu₃AsS₄	63	63	1	143447	910
Enstatite ()*	Pyroxene	Mg₂Si₂O₆	63	63	0		944
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	63	63	2	143444,143447	8173
Epsomite ()*	Epsomite	Mg(SO₄)·7H₂O	63	63	1	143447	484
Ferrierite-Na ()*	Ferrierite	(Na,K)₅(Si₃₁Al₅)O₇₂·18H₂O	63	63	1	143447	6
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	63	63	1	143447	2740
Forsterite ()*	Olivine	Mg₂(SiO₄)	63	63	1	143447	1188
Galena ()*	Rocksalt	PbS	63	63	1	143447	24243
Goethite ()*	Diaspore	FeO(OH)	63	63	1	143447	7437
Gold ()*	Copper	Au	63	63	2	143445,143447	30554
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	63	63	1	143447	6890
Halite ()*	Rocksalt	NaCl	63	63	1	143447	1398
Hematite ()*	Corundum	Fe₂O₃	63	63	2	143444,143447	14640
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	63	63	1	143447	5433
Jarosite ()*	Alunite	KFe³⁺₃(SO₄)₂(OH)₆	63	63	1	143447	2228
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	63	63	1	143447	5591
Laumontite ()*	Not in a structural group	CaAl₂Si₄O₁₂·4H₂O	63	63	1	143447	1271
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	63	63	1	143447	14899
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	63	63	1	143447	12537
Melanterite ()*	Melanterite	Fe(SO₄)·7H₂O	63	63	1	143447	915
Meta-alunogen ()*	None	Al₂(SO₄)₃·14H₂O	63	63	1	143447	8
Microcline ()*	Feldspar	K(AlSi₃O₈)	63	63	1	143447	4924
Molybdenite ()*	Molybdenite	MoS₂	63	63	1	143447	5800
Mottramite ()*	Descloizite	PbCu(VO₄)(OH)	63	63	2	143447,143448	362
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	63	63	2	143447,143448	17380
Neotocite ()*	Allophane	(Mn,Fe)SiO₃·H₂O (?)	63	63	1	143447	186
Nontronite ()*	Clay Smectite-vermiculite	Na_0.3Fe³⁺₂(Si,Al)₄O₁₀(OH)₂·nH₂O	63	63	1	143447	471
Olivenite ()*	Andalusite	Cu₂(AsO₄)(OH)	63	63	1	143447	492
Opal ()*	Amorphous	SiO₂·nH₂O	63	63	1	143447	2994
Orthoclase ()*	Feldspar	K(AlSi₃O₈)	63	63	1	143447	2349
Palygorskite ()*	Palygorskite Clay	(Mg,Al)₂Si₄O₁₀(OH)·4H₂O	63	63	1	143447	306
Papagoite ()*	None	CaCuAlSi₂O₆(OH)₃	63	63	1	143447	4
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	63	63	1	143447	2273
Plancheite ()*	Plancheite	Cu₈(Si₄O₁₁)₂(OH)₄·H₂O	63	63	1	143447	74
Planerite ()*	Turquoise	Al₆(PO₄)₂(PO₃OH)₂(OH)₈·4H₂O	63	63	1	143447	43
Posnjakite ()*	None	Cu₄(SO₄)(OH)₆·H₂O	63	63	1	143447	309
Pseudomalachite ()*	None	Cu₅(PO₄)₂(OH)₄	63	63	1	143447	369
Pyrite ()*	Pyrite	FeS₂	63	63	1	143447	39462
Pyrolusite ()*	Rutile	MnO₂	63	63	1	143447	3106
Quartz ()*	Quartz	SiO₂	63	63	3	143444,143447,143448	61156
Rutile ()*	Rutile	TiO₂	63	63	1	143447	5614
Shattuckite ()*	None	Cu₅(SiO₃)₄(OH)₂	63	63	1	143447	71
Siderite ()*	Calcite	Fe(CO₃)	63	63	1	143447	6417
Silver ()*	Copper	Ag	63	63	1	143447	5186
Sphalerite ()*	Sphalerite	ZnS	63	63	1	143447	21482
Stibiconite ()*	Pyrochlore	Sb³⁺Sb⁵⁺₂O₆(OH)	63	63	1	143447	446
Sulphur ()*	Sulphur	S	63	63	1	143447	2045
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	63	63	1	143447	3337
Tennantite-(Fe) ()*	Tetrahedrite	Cu₆(Cu₄Fe₂)As₄S₁₃	63	63	1	143447	1803
Tenorite ()*	None	CuO	63	63	1	143447	1101
Tetrahedrite-(Zn) ()*	Tetrahedrite	Cu₆(Cu₄Zn₂)Sb₄S₁₃	63	63	1	143447	5317
Titanite ()*	Titanite	CaTi(SiO₄)O	63	63	1	143447	4899
Torbernite ()*	None	Cu(UO₂)₂(PO₄)₂·12H₂O	63	63	1	143447	1059
Turquoise ()*	Turquoise	CuAl₆(PO₄)₄(OH)₈·4H₂O	63	63	1	143447	484
Zircon ()*	Zircon	Zr(SiO₄)	63	63	1	143447	5251

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Sample Num	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
EG94_211-00047	63	63	63	Pb-Pb	whole rock?	805			3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00048	63	63	63	Pb-Pb	whole rock?	806			3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
EG94_211-00049	63	63	63	Pb-Pb	whole rock?	214			3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Bouse et al. (1999)	10.2113/gsecongeo.94.2.211	EG94_211
PorphCu-00011	63	63	63				Albite, Alunite, Bornite, Brochantite, Chalcocite, Chalcopyrite, Chrysocolla, Covellite, Cuprite, Epidote, Gold, Ilmenite, Jarosite, Magnetite, Malachite, Molybdenite, Pyrite, Shattuckite, Sphalerite	Cu	3370	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	Ajo	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL
R040182	Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	https://rruff.info/R040182
R050133	Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	https://rruff.info/R050133
R120018	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	https://rruff.info/R120018
R120017	New Cornelia Mine (Ajo Mine), Ajo, Little Ajo Mts, Ajo District, Pima Co., Arizona, USA	https://rruff.info/R120017

All locality data graciously provided by mindat.org

All age data...