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:
Dartmoor Forest, West Devon, Devon, England, UK

Oldest recorded age at locality: 288
Youngest recorded age at locality: 274

mindat Locality ID: 35035
mindat URL: http://www.mindat.org/loc-35035.html

Tectonic Settings:

Total number of sublocalities beneath "Dartmoor Forest, West Devon, Devon, England, UK": 17
Total number of bottom-level sublocalities: 14

Number of Child Localities: 12
Child Localities:
Brimpts Tin Mines
Eylesbarrow Mine (Wheal Ruth)
Hexworthy
Huntingdon Mine (Devon Wheal Vor; Avon Consols)
Knack Mine (Steeperton Mine)
Nakers Hill Tin Mine
Nun's Cross
Princetown
T Girt Tin Stream
Wheal Katherine
Wheal Prosper
Whiteworks Mine

Latitude: 50°32'1"N
Longitude: 3°56'39"W
Decimal Degree (lat, lon): 50.533611111111,-3.9441666666667
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 B C Ca Cu F Fe H K Mg Na O P Si Sn U 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmorphousAutuniteFluoriteMeta-autuniteNoneNot in a structural groupQuartzRutileTourmaline

13 IMA Minerals at location:
Andersonite  (*)Autunite  (*)Boltwoodite  (*)Cassiterite  (*)Fluorite  (*)
Meta-autunite  (*)Opal  (*)Quartz  (*)Saléeite  (*)Schorl  (*)
Torbernite  (*)Uraninite  (*)Uranophane-α  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Andersonite  (*)Not in a structural groupNa2Ca(UO2)(CO3)3·5-6H2O281279112045947
Autunite  (*)AutuniteCa(UO2)2(PO4)2·10-12H2O28127911204591272
Boltwoodite  (*)None(K,Na)(UO2)(SiO3OH)·1.5H2O281279112045967
Cassiterite  (*)RutileSnO29120448,120449,120451,120453,120455,120456,120460,120461,1204635171
Fluorite  (*)FluoriteCaF228127911204599617
Meta-autunite  (*)Meta-autuniteCa(UO2)2(PO4)2·6H2O2812791120459388
Opal  (*)AmorphousSiO2·nH2O2120451,1204612994
Quartz  (*)QuartzSiO22812799120448,120449,120451,120453,120454,120456,120459,120460,12046161156
Saléeite  (*)NoneMg(UO2)2(PO4)2(H2O)10281279112045995
Schorl  (*)TourmalineNaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)2120454,1204602705
Torbernite  (*)NoneCu(UO2)2(PO4)2·12H2O28127911204591059
Uraninite  (*)FluoriteUO228127911204592718
Uranophane-α  (*)NoneCa(UO2)2(SiO3OH)2·5H2O2812791120459890


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_040a281279280 ± 1Rb-SrPreferred Age determined in study E 38425, E 38426, E 38427, E 38429, E 38430, E 420 Yes  1620Devon, England, UKDartmoor GraniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159 
Lucy_040b280280280Rb-SrPreliminary examindation yields age of Dartmoor as the second episode of Hercynian Magmatism.   Yes  1620Devon, England, UKDartmoor GraniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159Statistically acceptable whole rock and/or mineral isochrons were obtained for each of the granites studies and a preliminary inspection of the tata may suggst several episodes of of Hercynian magmatism in SW England. The first, c.. 290 generated the Carnmenellis, Bodmin and St Austell granites and was succeeded some 10 Ma by the Dartmoor grantie, and finally the intrusion of the Land's End granite at 270 Ma. The emplacement of the porphyry dyke and the main phase of mineralization, would then be closely associated with the second and third magmatic episodes. However more detailed examintation of the data and comparison with other work reveals certain major discrepencies in the hypothesis.
Lucy_040c288274281 ± 7K-ArPrevious age stated for the Dartmoor Granite   Yes  1620Devon, England, UKDartmoor GraniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159In complete aggreement with the plateau ages of the 282 Ma for the Coombestone Tor and Gidleigh Tor.
Lucy_049281279280 ± 1Rb-SrAge granite intruded E 44796    295926Foggintor Quarry, Princetown, Dartmoor Forest, West Devon, Devon, England, UKFoggintor QuarryDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159 

SampleSource LocalityReference URL

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