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:
Great Dowgas Mine (St Stephen Tin And Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK


mindat Locality ID: 34378
mindat URL: http://www.mindat.org/loc-34378.html

Tectonic Settings:

Total number of sublocalities beneath "Great Dowgas Mine (St Stephen Tin And Copper Mines), Downderry, St Stephen-in-Brannel, Cornwall, England, UK": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Ventonwyn Mine

Latitude: 50°19'3"N
Longitude: 4°51'47"W
Decimal Degree (lat, lon): 50.3175,-4.8630555555556
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 As Au B Bi C Ca Cu F Fe H Mg Na O S Si Sn 

Elements from minerals reported directly at this locality: Al As Au B Bi C Ca Cu F Fe H Mg Na O S Si 

Structural Groups for minerals in this locality: 
AmphiboleArsenicArsenopyriteCalciteChalcopyriteClayCopperFluoriteKaoliniteNone
PyriteQuartzRutileStibniteTourmaline

14 IMA Minerals at location:
Actinolite  (*)Arsenopyrite  (*)Bismuth  (*)Bismuthinite  (*)Cassiterite  (*)
Chalcopyrite  (*)Copper  (*)Fluorite  (*)Gold  (*)Kaolinite  (*)
Pyrite  (*)Quartz  (*)Schorl  (*)Siderite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Actinolite  (*)Amphibole   Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)203419
Arsenopyrite  (*)ArsenopyriteFeAsS09052
Bismuth  (*)ArsenicBi01966
Bismuthinite  (*)StibniteBi2S301935
Cassiterite  (*)RutileSnO211190075171
Chalcopyrite  (*)ChalcopyriteCuFeS2027198
Copper  (*)CopperCu03846
Fluorite  (*)FluoriteCaF209617
Gold  (*)CopperAu030554
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)405591
Pyrite  (*)PyriteFeS2039462
Quartz  (*)QuartzSiO2111900761156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)02705
Siderite  (*)CalciteFe(CO3)06417


No ages have been assigned to this locality yet.
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