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:
Downderry, St Stephen-in-Brannel, Cornwall, England, UK


mindat Locality ID: 240848
mindat URL: http://www.mindat.org/loc-240848.html

Tectonic Settings:

Total number of sublocalities beneath "Downderry, St Stephen-in-Brannel, Cornwall, England, UK": 6
Total number of bottom-level sublocalities: 4

Number of Child Localities: 3
Child Localities:
Downderry Consols (Wheal Lady Grenville)
Great Dowgas Mine (St Stephen Tin And Copper Mines)
St Austell Consols (incl. Wheal Hawkins)

Latitude: 50°19'13"N
Longitude: 4°52'2"W
Decimal Degree (lat, lon): 50.320277777778,-4.8672222222222
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 Ba Bi C Ca Co Cu F Fe H K Mg Na Ni O Pb S Si Sn U 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleArsenicArsenopyriteBaryteCalciteChalcopyriteClayCobaltiteCopperFluorite
KaoliniteLöllingiteNickelineNonePerovskitePharmacosideritePyriteQuartzRocksaltRutile
SkutteruditeSpinelStibniteTourmalineVivianite

28 IMA Minerals at location:
Actinolite  (*)Annabergite  (*)Arsenopyrite  (*)Baryte  (*)Bismuth  (*)
Bismuthinite  (*)Cassiterite  (*)Chalcopyrite  (*)Clinosafflorite  (*)Cobaltite  (*)
Copper  (*)Erythrite  (*)Fluorite  (*)Galena  (*)Gold  (*)
Kaolinite  (*)Magnetite  (*)Nickeline  (*)Nickelskutterudite  (*)Parasymplesite  (*)
Pharmacosiderite  (*)Pyrite  (*)Quartz  (*)Safflorite  (*)Schorl  (*)
Scorodite  (*)Siderite  (*)Uraninite  (*)
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)211190063419
Annabergite  (*)VivianiteNi3(AsO4)2·8H2O1119008445
Arsenopyrite  (*)ArsenopyriteFeAsS3119006,119008,1190099052
Baryte  (*)BaryteBa(SO4)111900811547
Bismuth  (*)ArsenicBi11190061966
Bismuthinite  (*)StibniteBi2S32119006,1190081935
Cassiterite  (*)RutileSnO26119005,119006,119007,119008,119009,1190105171
Chalcopyrite  (*)ChalcopyriteCuFeS24119006,119008,119009,11901027198
Clinosafflorite  (*)LöllingiteCoAs2111900821
Cobaltite  (*)CobaltiteCoAsS1119008966
Copper  (*)CopperCu2119006,1190083846
Erythrite  (*)VivianiteCo3(AsO4)2·8H2O1119008814
Fluorite  (*)FluoriteCaF22119006,1190099617
Galena  (*)RocksaltPbS111900824243
Gold  (*)CopperAu111900630554
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)411190065591
Magnetite  (*)SpinelFe2+Fe3+2O4111900814899
Nickeline  (*)NickelineNiAs1119008633
Nickelskutterudite  (*)Skutterudite Perovskite(Ni,Co,Fe)As31119008176
Parasymplesite  (*)VivianiteFe2+3(AsO4)2·8H2O1119008124
Pharmacosiderite  (*)PharmacosideriteKFe3+4(AsO4)3(OH)4·6-7H2O1119008428
Pyrite  (*)PyriteFeS22119006,11900839462
Quartz  (*)QuartzSiO23119006,119007,11900861156
Safflorite  (*)LöllingiteCoAs21119008317
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)11190062705
Scorodite  (*)NoneFe3+(AsO4)·2H2O11190081153
Siderite  (*)CalciteFe(CO3)2119006,1190086417
Uraninite  (*)FluoriteUO211190082718


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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