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:
Balleswidden Mine, St Just, Cornwall, England, UK

Oldest recorded age at locality: 270
Youngest recorded age at locality: 100

mindat Locality ID: 1266
mindat URL: http://www.mindat.org/loc-1266.html

Tectonic Settings:

Total number of sublocalities beneath "Balleswidden Mine, St Just, Cornwall, England, UK": 3
Total number of bottom-level sublocalities: 3

Number of Child Localities: 2
Child Localities:
Davy Shaft (Davy's Shaft)
Hobboys Mine

Latitude: 50°7'22"N
Longitude: 5°39'24"W
Decimal Degree (lat, lon): 50.122777777778,-5.6566666666667
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 B Bi C Ca Cu F Fe H K Na O S Si Sn 

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

Structural Groups for minerals in this locality: 
ArsenicArsenopyriteCalciteClayCopperCorundumFeldsparFluoriteKaoliniteMica
NoneQuartzRutileStibniteTourmaline

13 IMA Minerals at location:
Arsenopyrite  (*)Bismuth  (*)Bismuthinite  (*)Calcite  (*)Cassiterite  (*)
Copper  (*)Fluorite  (*)Hematite  (*)Kaolinite  (*)Muscovite  (*)
Orthoclase  (*)Quartz  (*)Schorl  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS27010009052
Bismuth  (*)ArsenicBi27010001966
Bismuthinite  (*)StibniteBi2S327010001935
Calcite  (*)CalciteCa(CO3)270100027770
Cassiterite  (*)RutileSnO227010011187755171
Copper  (*)CopperCu27010003846
Fluorite  (*)FluoriteCaF227010009617
Hematite  (*)CorundumFe2O3270100014640
Kaolinite  (*)Clay KaoliniteAl2Si2O5(OH)427010005591
Muscovite  (*)Mica ClayKAl2(Si3Al)O10(OH)2270100017380
Orthoclase  (*)FeldsparK(AlSi3O8)27010002349
Quartz  (*)QuartzSiO2270100061156
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)27010002705


1 Ages assigned to this locality:

Excel IDMax Age (Ma)Min Age (Ma)Age as listed in referenceDating MethodAge InterpretPrioritized?Sample SourceSample NumRun NumAge from other LocalityDated MineralMinerals explicitely stated as having this ageAge applies to these ElementsMinDat Locality IDDated Locality (Max Age)Location as listed in referenceReferenceReference DOIReference IDAge Notes
Lucy_081270100270-10040Ar - 39ArLodes post-dating elvan intrusion and primary mineralization.   Yes  1265St Just, Cornwall, England, UKSt JustHawkes et al. (1978 US4_51Possibility of hydrothermal degassing of lode material around 210 Ma and 215 Ma which overprints a primary formation age of roughly 270 Ma. New mineral growth may have occurred close to 165 Ma with further hydrothermal activity at about 100 Ma. Adularia from veins in the Lizard Complex also provides indication

SampleSource LocalityReference URL

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