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:
Wheal Bray, Altarnun, Cornwall, England, UK

Oldest recorded age at locality: 231
Youngest recorded age at locality: 0

mindat Locality ID: 844
mindat URL: http://www.mindat.org/loc-844.html

Tectonic Settings:

Total number of sublocalities beneath "Wheal Bray, Altarnun, Cornwall, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 50°36'43"N
Longitude: 4°32'50"W
Decimal Degree (lat, lon): 50.611944444444,-4.5472222222222
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: As Fe Ni O S Si U 

Elements from minerals reported directly at this locality: As Fe Ni O S Si U 

Structural Groups for minerals in this locality: 
FluoriteLöllingiteNonePyriteQuartz

4 IMA Minerals at location:
Pyrite  (*)Quartz  (*)Rammelsbergite  (*)Uraninite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Pyrite  (*)PyriteFeS22310039462
Quartz  (*)QuartzSiO22310061156
Rammelsbergite  (*)LöllingiteNiAs223100233
Uraninite  (*)FluoriteUO2231002718


5 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_235169161165 ± 4206 Pb/238UAge of Pitchblende      844Wheal Bray, Altarnun, Cornwall, England, UKWheal BrayDarnley et al. (1965) MM34_159 
Lucy_246231091 ± 140207Pb/206PbIsotopic Age of Uranite NCL1015    844Wheal Bray, Altarnun, Cornwall, England, UKWheal BrayDarnley et al. (1965) MM34_159(Ages taken from table with unclear titles) Chemical analysis of Pb. Analysis of 204Pb.
Lucy_247169161165 ± 4206Pb/238UIsotopic Age of Uranite NCL1015    844Wheal Bray, Altarnun, Cornwall, England, UKWheal BrayDarnley et al. (1965) MM34_159(Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 206Pb.
Lucy_248170150160 ± 10207Pb/235UIsotopic Age of Uranite NCL1015    844Wheal Bray, Altarnun, Cornwall, England, UKWheal BrayDarnley et al. (1965) MM34_159(Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 207Pb.
Lucy_262169161165 ± 4206Pb/238UUsing Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization.      844Wheal Bray, Altarnun, Cornwall, England, UKWheal BrayDarnley et al. (1965) MM34_159 

SampleSource LocalityReference URL

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