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:
Pilot Hill, Pilot Hill District, El Dorado Co., California, USA


mindat Locality ID: 264222
mindat URL: http://www.mindat.org/loc-264222.html

Tectonic Settings:

Total number of sublocalities beneath "Pilot Hill, Pilot Hill District, El Dorado Co., California, USA": 16
Total number of bottom-level sublocalities: 16

Number of Child Localities: 16
Child Localities:
Black Rock Placer
Boles Placer
Bonanza Mine [2]
Boston Mine [2]
Boulder Mine [2]
Camel Back Mine (Camelback Mine; Voss Mine; Vose Mine)
Costa Ranch Mine
Fairmount Mine
Homestead Placer
Pilot Hill Prospect (Pilot Hill Mine)
Pioneer-Lilyama Mine (Lilyama Mine; Lilyama Extension Mine; Pioneer Mine; Little Emma Mine; Lilyama Copper And Gold Mine; Volo Mine)
Rose Mine
Smith Mine
Unknown Au Occurrence [29]
Unnamed Placer Mining Area [27]
Upper American Placer

Latitude: 38°49'48"N
Longitude: 121°'53"W
Decimal Degree (lat, lon): 38.83,-121.01472222222
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 C Ca Cr Cu F Fe H Mg Na O Pb S Sb Si 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
BrochantiteCalciteChalcanthiteChalcopyriteClinozoisiteCopperCorundumCovelliteEpidoteMalachite
NoneNot in a structural groupPyriteQuartzRocksaltSpinelTetrahedriteVesuvianite

18 IMA Minerals at location:
Azurite  (*)Bornite  (*)Brochantite  (*)Calcite  (*)Chalcanthite  (*)
Chalcopyrite  (*)Chromite  (*)Covellite  (*)Epidote  (*)Galena  (*)
Gold  (*)Hematite  (*)Magnetite  (*)Malachite  (*)Pyrite  (*)
Quartz  (*)Tetrahedrite-(Zn)  (*)Vesuvianite  (*)
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)211551375509
Bornite  (*)NoneCu5FeS42155132,1551375516
Brochantite  (*)BrochantiteCu4(SO4)(OH)611551371633
Calcite  (*)CalciteCa(CO3)115513727770
Chalcanthite  (*)ChalcanthiteCu(SO4)·5H2O1155137925
Chalcopyrite  (*)ChalcopyriteCuFeS23155132,155133,15513727198
Chromite  (*)SpinelFe2+Cr2O411551363902
Covellite  (*)CovelliteCuS11551374165
Epidote  (*)Epidote ClinozoisiteCa2(Al2Fe3+)[Si2O7][SiO4]O(OH)11551378173
Galena  (*)RocksaltPbS115513724243
Gold  (*)CopperAu5155128,155130,155131,155138,15513930554
Hematite  (*)CorundumFe2O3115513714640
Magnetite  (*)SpinelFe2+Fe3+2O4115513714899
Malachite  (*)MalachiteCu2(CO3)(OH)22155133,15513712537
Pyrite  (*)PyriteFeS23155132,155133,15513739462
Quartz  (*)QuartzSiO25155130,155132,155137,155138,15513961156
Tetrahedrite-(Zn)  (*)TetrahedriteCu6(Cu4Zn2)Sb4S1311551375317
Vesuvianite  (*)Vesuvianite(Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)1011551371395


No ages have been assigned to this locality yet.
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