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:
Trojan District, Lawrence Co., South Dakota, USA


mindat Locality ID: 27013
mindat URL: http://www.mindat.org/loc-27013.html

Tectonic Settings:

Total number of sublocalities beneath "Trojan District, Lawrence Co., South Dakota, USA": 6
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Bald Mountain Mining Company
Clinton Mine
Spearfish
Trojan

Latitude: 44°20'50"N
Longitude: 103°50'57"W
Decimal Degree (lat, lon): 44.347222222222,-103.84916666667
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 Au C Ca Cl Cu Fe H Mg O P S Si Te 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ArsenopyriteAtacamiteClayCopperMeloniteNonePyriteQuartzRocksaltTalc

12 IMA Minerals at location:
Arsenopyrite  (*)Atacamite  (*)Chlorargyrite  (*)Dolomite  (*)Emmonsite  (*)
Gold  (*)Pyrite  (*)Quartz  (*)Silver  (*)Sylvanite  (*)
Talc  (*)Variscite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS12658349052
Atacamite  (*)AtacamiteCu2Cl(OH)31265839544
Chlorargyrite  (*)RocksaltAgCl12658391382
Dolomite  (*)NoneCaMg(CO3)22265834,2658359895
Emmonsite  (*)NoneFe3+2(Te4+O3)3·2H2O126583534
Gold  (*)CopperAu2265835,26583730554
Pyrite  (*)PyriteFeS22265834,26583539462
Quartz  (*)QuartzSiO22265834,26583561156
Silver  (*)CopperAg2265835,2658375186
Sylvanite  (*)MeloniteAgAuTe43265835,265837,265839337
Talc  (*)Clay TalcMg3Si4O10(OH)212658353337
Variscite  (*)NoneAl(PO4)·2H2O1265835301


No ages have been assigned to this locality yet.

All locality data graciously provided by mindat.org

All age data...

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