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:
Pecos Mine (Hamilton Mine; Cowles Mine), Willow Creek District, San Miguel Co., New Mexico, USA

Oldest recorded age at locality: 2500
Youngest recorded age at locality: 541

mindat Locality ID: 48271
mindat URL: http://www.mindat.org/loc-48271.html

Tectonic Settings:

Total number of sublocalities beneath "Pecos Mine (Hamilton Mine; Cowles Mine), Willow Creek District, San Miguel Co., New Mexico, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 35°45'32"N
Longitude: 105°40'5"W
Decimal Degree (lat, lon): 35.758888888889,-105.66805555556
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 Ca Cu Fe H K Mg O Pb S Si Zn 

Elements from minerals reported directly at this locality: Ag Al Au Ca Cu Fe H K Mg O Pb S Si Zn 

Structural Groups for minerals in this locality: 
AmphiboleChalcopyriteClayCopperCorundumMicaNickelineNonePyriteQuartz
RocksaltSphaleriteSpinel

12 IMA Minerals at location:
Actinolite  (*)Chalcopyrite  (*)Galena  (*)Gold  (*)Hematite  (*)
Magnetite  (*)Muscovite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Silver  (*)Sphalerite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2250054103419
Chalcopyrite  (*)ChalcopyriteCuFeS22500541027198
Galena  (*)RocksaltPbS2500541024243
Gold  (*)CopperAu2500541030554
Hematite  (*)CorundumFe2O32500541014640
Magnetite  (*)SpinelFe2+Fe3+2O42500541014899
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)22500541017380
Pyrite  (*)PyriteFeS22500541039462
Pyrrhotite  (*)NickelineFe7S8250054109056
Quartz  (*)QuartzSiO22500541061156
Silver  (*)CopperAg250054105186
Sphalerite  (*)SphaleriteZnS2500541021482


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
vms-010682500541Proterozoic        48271Pecos Mine (Hamilton Mine; Cowles Mine), Willow Creek District, San Miguel Co., New Mexico, USAPecosMoiser et al. (2009) USGSOFR2009-1034 

All locality data graciously provided by mindat.org

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