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:
St Breward, Cornwall, England, UK

Oldest recorded age at locality: 284
Youngest recorded age at locality: 259

mindat Locality ID: 222157
mindat URL: http://www.mindat.org/loc-222157.html

Tectonic Settings:

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

Number of Child Localities: 3
Child Localities:
De Lank Quarry
Great Onslow Consols (Great Michell Consols)
Hantergantick Quarry

Latitude: 50°33'17"N
Longitude: 4°40'57"W
Decimal Degree (lat, lon): 50.554722222222,-4.6825
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 C Ca Cu F Fe O S Si Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
ArsenopyriteCalciteFluoriteNickelineNonePyriteQuartzSphalerite

8 IMA Minerals at location:
Arsenopyrite  (*)Chalcocite  (*)Fluorite  (*)Pyrite  (*)Pyrrhotite  (*)
Quartz  (*)Siderite  (*)Sphalerite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Arsenopyrite  (*)ArsenopyriteFeAsS11185109052
Chalcocite  (*)NoneCu2S11185105707
Fluorite  (*)FluoriteCaF211185109617
Pyrite  (*)PyriteFeS2111851039462
Pyrrhotite  (*)NickelineFe7S811185109056
Quartz  (*)QuartzSiO2111851061156
Siderite  (*)CalciteFe(CO3)11185106417
Sphalerite  (*)SphaleriteZnS111851021482


4 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_217282274278 ± 4K-ArAge for Bodmin Granitebiotite     222157St Breward, Cornwall, England, UKSt Breward QuarryMiller et al (1964)10.1002/gj.3350040109GJ4_105New ages on the granites and derived rocks. GPS from nearby De Lank Quarry.
Lucy_218277259268 ± 9K-ArAge for Bodmin Granitemuscovite   Muscovite  222157St Breward, Cornwall, England, UKSt Breward QuarryMiller et al (1964)10.1002/gj.3350040109GJ4_105New ages on the granites and derived rocks. GPS from nearby De Lank Quarry.
Lucy_034284266275 ± 9Rb-SrAge granite intruded E 38451    222158De Lank Quarry, St Breward, Cornwall, England, UKDe Lank QuarryDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159 
Lucy_033284266275 ± 9Rb-SrAge granite intruded E 38450    222156Hantergantick Quarry, St Breward, Cornwall, England, UKHantergantick QuarryDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

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