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:
Helena Mining District (Spring Hill Mining District), Lewis And Clark Co., Montana, USA


mindat Locality ID: 50269
mindat URL: http://www.mindat.org/loc-50269.html

Tectonic Settings:

Total number of sublocalities beneath "Helena Mining District (Spring Hill Mining District), Lewis And Clark Co., Montana, USA": 42
Total number of bottom-level sublocalities: 39

Number of Child Localities: 37
Child Localities:
Clay Deposit In Orofino Gulch
Colorado Gulch Dolomite Deposit
Copper Cliff Mine
Dry Gulch
Dry Gulch Limestone
Eula Mine
Gray Rock Mine
Grizzly Gulch
Harrison Quarry
Helena
Helena Area
Helena District
Helena Limestone Mine
Helena Placers (Last Chance Gulch; Tenmile Creek)
Independent Prospect
Lady Luck
Limestone Occurrence (MRDS - 10221343)
Little Rock Placer
Mamie D. Lode Prospect
Missouri River Placers
Nelson Gulch Marble Deposit
Nelson Gulch Placers
Occidental Claim
PG Mine
Pretty Girl Placer
San Juan
Schimpf Quarry
Sky Mine
Spraukel Occurrence
Spring Hill Mine
Swede Gulch
Unknown Talc-Soapstone (MRDS - 10019786)
Unnamed Gold Occurrence (MRDS - 10173123)
Unnamed Marble Occurrence (MRDS - 10196547)
Unnamed Placer Mine (MRDS - 10270537)
Unnamed Talc Occurrence (MRDS - 10221732)
Whitlatch-Union Lode (Owyhee And McIntye Inclines)

Latitude: 46°34'39"N
Longitude: 112°5'9"W
Decimal Degree (lat, lon): 46.5775,-112.08583333333
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 B C Ca Cu F Fe H K Li Mg Na O Pb S Si W Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
CalciteChalcopyriteChloriteClayClinozoisiteCopperCorundumEpidoteGarnetMica
NickelineNonePyritePyroxeneQuartzRocksaltScapoliteScheeliteSpinelTourmaline
Vesuvianite

24 IMA Minerals at location:
Ankerite  (*)Calcite  (*)Chalcopyrite  (*)Clinochlore  (*)Clintonite  (*)
Corundum  (*)Diopside  (*)Dolomite  (*)Elbaite  (*)Epidote  (*)
Gahnite  (*)Galena  (*)Gold  (*)Grossular  (*)Meionite  (*)
Muscovite  (*)Phlogopite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Scheelite  (*)Silver  (*)Spinel  (*)Vesuvianite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Ankerite  (*)NoneCa(Fe2+,Mg)(CO3)212300943092
Calcite  (*)CalciteCa(CO3)5230071,230075,230076,230079,23009427770
Chalcopyrite  (*)ChalcopyriteCuFeS22230076,23009427198
Clinochlore  (*)Chlorite ClayMg5Al(AlSi3O10)(OH)812300711756
Clintonite  (*)Mica ClayCaAlMg2(SiAl3O10)(OH)22230071,23007586
Corundum  (*)CorundumAl2O32230074,2300841797
Diopside  (*)PyroxeneCaMgSi2O612300714135
Dolomite  (*)NoneCaMg(CO3)22230062,2300979895
Elbaite  (*)TourmalineNa(Al1.5Li1.5)Al6(Si6O18)(BO3)3(OH)3(OH)1230071520
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)12300718173
Gahnite  (*)SpinelZnAl2O41230071445
Galena  (*)RocksaltPbS2230076,23009424243
Gold  (*)CopperAu11230072,230076,230078,230079,230082,230083,230084,230086,230094,230096,23010230554
Grossular  (*)GarnetCa3Al2(SiO4)312300711544
Meionite  (*)ScapoliteCa4Al6Si6O24(CO3)1230071176
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2123007117380
Phlogopite  (*)Mica ClayKMg3(AlSi3O10)(OH)212300712273
Pyrite  (*)PyriteFeS24230076,230094,230096,23010239462
Pyrrhotite  (*)NickelineFe7S812300949056
Quartz  (*)QuartzSiO26230061,230076,230079,230094,230096,23010261156
Scheelite  (*)ScheeliteCa(WO4)12300794894
Silver  (*)CopperAg12300795186
Spinel  (*)SpinelMgAl2O42230071,2300751934
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)102230071,2300751395


No ages have been assigned to this locality yet.
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