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:
French Gulch, Breckenridge District, Summit Co., Colorado, USA


mindat Locality ID: 29091
mindat URL: http://www.mindat.org/loc-29091.html

Tectonic Settings:

Total number of sublocalities beneath "French Gulch, Breckenridge District, Summit Co., Colorado, USA": 9
Total number of bottom-level sublocalities: 7

Number of Child Localities: 2
Child Localities:
Farncomb Hill
French Gulch Placers

Latitude: 39°26'8"N
Longitude: 105°51'52"W
Decimal Degree (lat, lon): 39.435555555556,-105.86444444444
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: Al Au Bi C Ca Cu F Fe H Mn O Pb S Si Zn 

Elements from minerals reported directly at this locality: Bi Ca Fe O Si 

Structural Groups for minerals in this locality: 
ArsenicCalciteChalcopyriteClayCopperFluoriteGarnetGypsumKaoliniteMalachite
NonePyriteQuartzRocksaltSphaleriteStibnite

15 IMA Minerals at location:
Andradite  (*)Bismuth  (*)Bismuthinite  (*)Calcite  (*)Chalcopyrite  (*)
Fluorite  (*)Galena  (*)Gold  (*)Gypsum  (*)Kaolinite  (*)
Malachite  (*)Pyrite  (*)Quartz  (*)Rhodochrosite  (*)Sphalerite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Andradite  (*)GarnetCa3Fe3+2(SiO4)301534
Bismuth  (*)ArsenicBi01966
Bismuthinite  (*)StibniteBi2S311976691935
Calcite  (*)CalciteCa(CO3)2197663,19766727770
Chalcopyrite  (*)ChalcopyriteCuFeS2119766927198
Fluorite  (*)FluoriteCaF211976699617
Galena  (*)RocksaltPbS2197669,19767024243
Gold  (*)CopperAu7197663,197664,197666,197667,197668,197669,19767030554
Gypsum  (*)GypsumCa(SO4)·2H2O11976636890
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411976695591
Malachite  (*)MalachiteCu2(CO3)(OH)2119766312537
Pyrite  (*)PyriteFeS22197669,19767039462
Quartz  (*)QuartzSiO2119766961156
Rhodochrosite  (*)CalciteMn(CO3)11976691711
Sphalerite  (*)SphaleriteZnS2197669,19767021482


No ages have been assigned to this locality yet.
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