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:
Guffey District (Freshwater District), Fremont Co., Colorado, USA


mindat Locality ID: 281265
mindat URL: http://www.mindat.org/loc-281265.html

Tectonic Settings:

Total number of sublocalities beneath "Guffey District (Freshwater District), Fremont Co., Colorado, USA": 6
Total number of bottom-level sublocalities: 5

Number of Child Localities: 2
Child Localities:
Currant Creek Area
Isabel Mine

Latitude: 38°38'2"N
Longitude: 105°29'22"W
Decimal Degree (lat, lon): 38.633888888889,-105.48944444444
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 C Ca Cu Fe H Mg Mo O Pb S Si Ti W Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AllophaneAmphiboleCalciteChalcopyriteClinozoisiteCopperEpidoteGarnetMalachiteNone
Not in a structural groupPyritePyroxeneQuartzRocksaltScheeliteSphaleriteSpinelTitanite

24 IMA Minerals at location:
Actinolite  (*)Calcite  (*)Chalcopyrite  (*)Chrysocolla  (*)Clinozoisite  (*)
Diopside  (*)Epidote  (*)Gahnite  (*)Galena  (*)Gold  (*)
Grossular  (*)Hydrozincite  (*)Kyanite  (*)Malachite  (*)Powellite  (*)
Pyrite  (*)Quartz  (*)Scheelite  (*)Sillimanite  (*)Silver  (*)
Sphalerite  (*)Titanite  (*)Tremolite  (*)Zoisite  (*)
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)211884543419
Calcite  (*)CalciteCa(CO3)3188450,188452,18845427770
Chalcopyrite  (*)ChalcopyriteCuFeS22188450,18845427198
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O11884543531
Clinozoisite  (*)Clinozoisite EpidoteCa2Al3[Si2O7][SiO4]O(OH)11884521025
Diopside  (*)PyroxeneCaMgSi2O611884524135
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)2188450,1884528173
Gahnite  (*)SpinelZnAl2O41188454445
Galena  (*)RocksaltPbS118845424243
Gold  (*)CopperAu118845430554
Grossular  (*)GarnetCa3Al2(SiO4)311884521544
Hydrozincite  (*)NoneZn5(CO3)2(OH)611884541066
Kyanite  (*)Not in a structural groupAl2OSiO411884511507
Malachite  (*)MalachiteCu2(CO3)(OH)2118845412537
Powellite  (*)ScheeliteCa(MoO4)1188452494
Pyrite  (*)PyriteFeS2118845439462
Quartz  (*)QuartzSiO23188450,188453,18845461156
Scheelite  (*)ScheeliteCa(WO4)3188450,188452,1884534894
Sillimanite  (*)Not in a structural groupAl2SiO511884511516
Silver  (*)CopperAg11884545186
Sphalerite  (*)SphaleriteZnS118845421482
Titanite  (*)TitaniteCaTi(SiO4)O11884524899
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)211884522562
Zoisite  (*)EpidoteCa2Al3[Si2O7][SiO4]O(OH)2188452,1884541025


No ages have been assigned to this locality yet.
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All locality data graciously provided by mindat.org

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