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:
Loon Creek District, Custer Co., Idaho, USA


mindat Locality ID: 39487
mindat URL: http://www.mindat.org/loc-39487.html

Tectonic Settings:

Total number of sublocalities beneath "Loon Creek District, Custer Co., Idaho, USA": 48
Total number of bottom-level sublocalities: 47

Number of Child Localities: 47
Child Localities:
Airport Bar
Airport Disseminated Copper Occurrence
Biggs Ranch Placer
Dirty Dutchman Prospect
East Transfer Bar Prospect
Effa Prospect
Falconberry Ranch Placer
Gold Prospect (MRDS - 10120167)
Jack Creek Prospect
Loon Creek Placers (Loon Creek Hydraulic Placer Mining Company)
Loon Creek Quartz Vein Occurrence
Loon Creek Summit
Lost Eagle Claim (Waneta; Metcalf; Sunrise)
Massacre Mercury Claims
Monte Cristo Prospect
River Of No Return Wilderness
Shell Creek Bar Occurrence
South Packer Prospect
Stanley Creek Placer (Joe's Gulch)
Tin Cup Bar Prospect
Triple B Prospect
Unnamed Copper Prospect (Metcalf Mine; MRDS - 10119920)
Unnamed Copper Prospect (MRDS - 10192960)
Unnamed Copper Prospect (MRDS - 10240990)
Unnamed Gold Prospect (MRDS - 10120251)
Unnamed Gold Prospect (MRDS - 10143703)
Unnamed Gold Prospect (MRDS - 10168015)
Unnamed Gold Prospect (MRDS - 10168028)
Unnamed Gold Prospect (MRDS - 10168310)
Unnamed Gold Prospect (MRDS - 10168464)
Unnamed Gold Prospect (MRDS - 10168674)
Unnamed Gold Prospect (MRDS - 10192950)
Unnamed Gold Prospect (MRDS - 10216692)
Unnamed Gold Prospect (MRDS - 10217067)
Unnamed Gold Prospect (MRDS - 10240659)
Unnamed Gold Prospect (MRDS - 10290144)
Unnamed Gold Prospect (New York Mine; MRDS - 10192671)
Unnamed Silver Prospect (Lead Prospect; MRDS - 10192511)
Unnamed Silver Prospect (Lead Prospect; MRDS - 10265659)
Unnamed Silver Prospect (Lucky Day; Silver Prospect; MRDS - 10305603)
Unnamed Silver Prospect (MRDS - 10168110)
Unnamed Silver Prospect (MRDS - 10168232)
Unnamed Silver Prospect (MRDS - 10241048)
West Tincup Bar Prospect
West Transfer Bar Prospect
Whiskey Group
Willis Placers

Latitude: 44°34'58"N
Longitude: 114°51'46"W
Decimal Degree (lat, lon): 44.582777777778,-114.86277777778

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 Au Ba C Ca Cu F Fe H Hg O S Sb Si Ti Zr 

Elements from minerals reported directly at this locality: Au Cu Fe S Sb Zn 

Structural Groups for minerals in this locality: 
BaryteCalciteChalcopyriteCopperCorundumDiasporeFluoriteMalachiteNickelineNone
Not in a structural groupPyriteQuartzSulphurTetrahedriteZircon

20 IMA Minerals at location:
Azurite  (*)Baryte  (*)Bornite  (*)Calcite  (*)Chalcopyrite  (*)
Cinnabar  (*)Copper  (*)Fluorite  (*)Goethite  (*)Gold  (*)
Ilmenite  (*)Malachite  (*)Pyrite  (*)Pyrrhotite  (*)Quartz  (*)
Siderite  (*)Silver  (*)Sulphur  (*)Tetrahedrite-(Zn)  (*)Zircon  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Azurite  (*)Not in a structural groupCu3(CO3)2(OH)212070865509
Baryte  (*)BaryteBa(SO4)120708611547
Bornite  (*)NoneCu5FeS405516
Calcite  (*)CalciteCa(CO3)120708627770
Chalcopyrite  (*)ChalcopyriteCuFeS23207073,207082,20708627198
Cinnabar  (*)NoneHgS2207089,2071172600
Copper  (*)CopperCu03846
Fluorite  (*)FluoriteCaF212070819617
Goethite  (*)DiasporeFeO(OH)12070817437
Gold  (*)CopperAu030554
Ilmenite  (*)CorundumFe2+Ti4+O32207072,2070765433
Malachite  (*)MalachiteCu2(CO3)(OH)22207073,20708612537
Pyrite  (*)PyriteFeS23207073,207082,20708639462
Pyrrhotite  (*)NickelineFe7S812070869056
Quartz  (*)QuartzSiO23207081,207082,20708661156
Siderite  (*)CalciteFe(CO3)2207082,2070866417
Silver  (*)CopperAg12071175186
Sulphur  (*)SulphurS12070862045
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1305317
Zircon  (*)ZirconZr(SiO4)12070895251



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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