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

Important Update News

The RRUFF Project has been migrated to RRUFF.net. Please update your bookmarks immediately, if you have not done so.

The data on this website is already three years out of date, and the entire website will be taken offline before the end of the year.

We are grateful to NASA for the funding of this effort.




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:
Blue Eagle And Exposed Reef Group, Alum Gulch, Harshaw District, Patagonia Mts, Santa Cruz Co., Arizona, USA


mindat Locality ID: 187187
mindat URL: http://www.mindat.org/loc-187187.html

Tectonic Settings:

Total number of sublocalities beneath "Blue Eagle And Exposed Reef Group, Alum Gulch, Harshaw District, Patagonia Mts, Santa Cruz Co., Arizona, USA": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 3
Child Localities:
Blue Eagle Mine (Blue Eagle 1 And 2 Claims; Copper Ledge; Hillside Copper Mine)
Exposed Reef Mines (Saint Louis Mine)
Invincible Prospect

Latitude: 31°29'48"N
Longitude: 110°45'11"W
Decimal Degree (lat, lon): 31.496666666667,-110.75305555556
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 Ca Cu Fe H K O Pb S Sb Si Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AcanthiteChalcanthiteChalcopyriteClayClinozoisiteCorundumEpidoteKaoliniteMicaNone
Not in a structural groupPyritePyrophylliteRocksaltSphaleriteSulphurTetrahedrite

18 IMA Minerals at location:
Acanthite  (*)Alunite  (*)Bornite  (*)Chalcanthite  (*)Chalcocite  (*)
Chalcopyrite  (*)Cuprite  (*)Epidote  (*)Galena  (*)Hematite  (*)
Kaolinite  (*)Muscovite  (*)Pyrite  (*)Pyrophyllite  (*)Sphalerite  (*)
Sulphur  (*)Tenorite  (*)Tetrahedrite-(Zn)  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Acanthite  (*)AcanthiteAg2S11466542793
Alunite  (*)NoneKAl3(SO4)2(OH)61146654966
Bornite  (*)NoneCu5FeS42146654,1466555516
Chalcanthite  (*)ChalcanthiteCu(SO4)·5H2O2146654,146656925
Chalcocite  (*)NoneCu2S11466555707
Chalcopyrite  (*)ChalcopyriteCuFeS23146654,146655,14665627198
Cuprite  (*)Not in a structural groupCu2O11466552970
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)11466548173
Galena  (*)RocksaltPbS2146654,14665524243
Hematite  (*)CorundumFe2O3114665514640
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411466545591
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2114665417380
Pyrite  (*)PyriteFeS23146654,146655,14665639462
Pyrophyllite  (*)Clay PyrophylliteAl2Si4O10(OH)21146654771
Sphalerite  (*)SphaleriteZnS2146654,14665521482
Sulphur  (*)SulphurS2146654,1466562045
Tenorite  (*)NoneCuO11466541101
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1311466555317


No ages have been assigned to this locality yet.
SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...