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:
Elkhorn Mine (Holter), Elkhorn, Elkhorn Mining District, Jefferson Co., Montana, USA


mindat Locality ID: 10923
mindat URL: http://www.mindat.org/loc-10923.html

Tectonic Settings:

Total number of sublocalities beneath "Elkhorn Mine (Holter), Elkhorn, Elkhorn Mining District, Jefferson Co., Montana, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 46°17'25"N
Longitude: 111°53'17"W
Decimal Degree (lat, lon): 46.290277777778,-111.88805555556
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 As Bi C Ca Cl Cu Fe H Mg Mn O Pb S Sb Si Te V Zn 

Elements from minerals reported directly at this locality: Ag Al As Bi C Ca Cl Cu Fe H Mg Mn O Pb S Sb Si Te V Zn 

Structural Groups for minerals in this locality: 
AllophaneApatiteAragoniteBaryteBournoniteCalciteChalcopyriteCopperCovelliteDescloizite
LinariteMalachiteNickelineNoneNot in a structural groupPyriteQuartzRocksaltRutileSphalerite
TetradymiteTetrahedrite

31 IMA Minerals at location:
Anglesite  (*)Aragonite  (*)Aurichalcite  (*)Azurite  (*)Bournonite  (*)
Calcite  (*)Cerussite  (*)Chalcopyrite  (*)Chlorargyrite  (*)Chrysocolla  (*)
Copper  (*)Covellite  (*)Cuprite  (*)Descloizite  (*)Dolomite  (*)
Galena  (*)Hemimorphite  (*)Linarite  (*)Malachite  (*)Mimetite  (*)
Pyrite  (*)Pyrolusite  (*)Pyrrhotite  (*)Quartz  (*)Rosasite  (*)
Silver  (*)Smithsonite  (*)Sphalerite  (*)Tetradymite  (*)Tetrahedrite-(Zn)  (*)
Vanadinite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Anglesite  (*)BarytePb(SO4)02734
Aragonite  (*)AragoniteCa(CO3)03250
Aurichalcite  (*)None(Zn,Cu)5(CO3)2(OH)60919
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)205509
Bournonite  (*)BournoniteCuPbSbS301089
Calcite  (*)CalciteCa(CO3)027770
Cerussite  (*)AragonitePb(CO3)04979
Chalcopyrite  (*)ChalcopyriteCuFeS2027198
Chlorargyrite  (*)RocksaltAgCl01382
Chrysocolla  (*)Allophane(Cu2-xAlx)H2-xSi2O5(OH)4·nH2O03531
Copper  (*)CopperCu03846
Covellite  (*)CovelliteCuS04165
Cuprite  (*)Not in a structural groupCu2O02970
Descloizite  (*)DescloizitePbZn(VO4)(OH)0378
Dolomite  (*)NoneCaMg(CO3)209895
Galena  (*)RocksaltPbS024243
Hemimorphite  (*)Not in a structural groupZn4(Si2O7)(OH)2·H2O01689
Linarite  (*)LinariteCuPb(SO4)(OH)20987
Malachite  (*)MalachiteCu2(CO3)(OH)2012537
Mimetite  (*)ApatitePb5(AsO4)3Cl01107
Pyrite  (*)PyriteFeS2039462
Pyrolusite  (*)RutileMnO203106
Pyrrhotite  (*)NickelineFe7S809056
Quartz  (*)QuartzSiO2061156
Rosasite  (*)MalachiteCuZn(CO3)(OH)20454
Silver  (*)CopperAg05186
Smithsonite  (*)CalciteZn(CO3)02473
Sphalerite  (*)SphaleriteZnS021482
Tetradymite  (*)TetradymiteBi2Te2S0510
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1305317
Vanadinite  (*)ApatitePb5(VO4)3Cl0605


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...