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:
Ilsington, Teignbridge, Devon, England, UK

Oldest recorded age at locality: 298
Youngest recorded age at locality: 266

mindat Locality ID: 33691
mindat URL: http://www.mindat.org/loc-33691.html

Tectonic Settings:

Total number of sublocalities beneath "Ilsington, Teignbridge, Devon, England, UK": 8
Total number of bottom-level sublocalities: 8

Number of Child Localities: 8
Child Localities:
Albion Mine
Atlas Mine
Bagtor Mine
Haytor Consols (Hemsworthy Mine)
Haytor Mine
Haytor Quarry
Silverbrook Mine
Smallacombe Cutting

Latitude: 50°34'27"N
Longitude: 3°44'11"W
Decimal Degree (lat, lon): 50.574166666667,-3.7363888888889
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 Bi C Ca Fe H Mg Mn Na O Pb S Si Sn Zn 

Elements from minerals reported directly at this locality: 

Structural Groups for minerals in this locality: 
AmphiboleAragoniteArsenicAxiniteCalciteCorundumDiasporeGadoliniteGypsumNone
PyritePyroxeneQuartzRocksaltRutileSphaleriteSpinelSulphur

23 IMA Minerals at location:
Actinolite  (*)Aragonite  (*)Axinite-(Fe)  (*)Bismuth  (*)Calcite  (*)
Cassiterite  (*)Cerussite  (*)Datolite  (*)Dolomite  (*)Galena  (*)
Goethite  (*)Gypsum  (*)Hastingsite  (*)Hematite  (*)Hydrozincite  (*)
Johannsenite  (*)Magnetite  (*)Pyrite  (*)Quartz  (*)Siderite  (*)
Sphalerite  (*)Sulphur  (*)Tremolite  (*)
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)229826611203283419
Aragonite  (*)AragoniteCa(CO3)11203303250
Axinite-(Fe)  (*)AxiniteCa4Fe2+2Al4[B2Si8O30](OH)22982661120328260
Bismuth  (*)ArsenicBi11203251966
Calcite  (*)CalciteCa(CO3)112033027770
Cassiterite  (*)RutileSnO24120324,120325,120327,1203315171
Cerussite  (*)AragonitePb(CO3)11203304979
Datolite  (*)GadoliniteCaB(SiO4)(OH)2982661120328498
Dolomite  (*)NoneCaMg(CO3)211203309895
Galena  (*)RocksaltPbS112033024243
Goethite  (*)DiasporeFeO(OH)11203307437
Gypsum  (*)GypsumCa(SO4)·2H2O11203306890
Hastingsite  (*)AmphiboleNaCa2(Fe2+4Fe3+)(Si6Al2)O22(OH)22982661120328209
Hematite  (*)CorundumFe2O33120324,120325,12033114640
Hydrozincite  (*)NoneZn5(CO3)2(OH)611203301066
Johannsenite  (*)PyroxeneCaMnSi2O6298266112032873
Magnetite  (*)SpinelFe2+Fe3+2O4298266112032814899
Pyrite  (*)PyriteFeS2112033039462
Quartz  (*)QuartzSiO22982663120327,120328,12033061156
Siderite  (*)CalciteFe(CO3)29826611203286417
Sphalerite  (*)SphaleriteZnS112033021482
Sulphur  (*)SulphurS11203302045
Tremolite  (*)Amphibole   Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)229826611203282562


12 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_194298298298K-ArPrevious age stated, recalculated from the 305 quoted by Mayne et al.biotite     1520Haytor Mine, Ilsington, Teignbridge, Devon, England, UKHaytorMiller et al (1964)10.1002/gj.3350040109GJ4_105Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_195276266271 ± 5K-ArPrevious stated isotopic agebiotite     1520Haytor Mine, Ilsington, Teignbridge, Devon, England, UKHaytorMiller et al (1964)10.1002/gj.3350040109GJ4_105Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_196282272277 ± 5Rb-SrPrevious stated isotopic agebiotite     1520Haytor Mine, Ilsington, Teignbridge, Devon, England, UKHaytorMiller et al (1964)10.1002/gj.3350040109GJ4_105Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_197285275290K-ArPrevious stated isotopic agebiotite     1520Haytor Mine, Ilsington, Teignbridge, Devon, England, UKHaytorMiller et al (1964)10.1002/gj.3350040109GJ4_105Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_198290270280 ± 10K-ArAverage of above stated previous stated isotopic agebiotite     1520Haytor Mine, Ilsington, Teignbridge, Devon, England, UKHaytorMiller et al (1964)10.1002/gj.3350040109GJ4_105Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs)
Lucy_048280276278 ± 2Rb-SrAge granite intruded E 44794, E 44794 KFeldspar, E 44794 Plag., E 44794    292019Haytor Quarry, Ilsington, Teignbridge, Devon, England, UKHaytor West QuarryDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159Isochron for minerals seperated from the Haytor West specimen, this age is within the error of the whole rock.
Lucy_180287285287 - 285Pb-U/Pb-PbRange of ages given with 206Pb/238U, 207Pb/235U and 207Pb/206Pb.whole rockCORN-158A (15,16)    292019Haytor Quarry, Ilsington, Teignbridge, Devon, England, UKHaytor QuarryChen et al (1993)10.1144/gsjgs.150.6.1183JGSL150_1183Analytical data for igneous monazites with sample and (analysis) numbers
Lucy_181282.4280.6281.5 ± 0.940Ar-39ArIntergrated age of Cornubian BatholithmuscoviteCORN-158A  Muscovite  292019Haytor Quarry, Ilsington, Teignbridge, Devon, England, UKHaytor QuarryChen et al (1993)10.1144/gsjgs.150.6.1183JGSL150_1183Analytical data for micas
Lucy_182280.8278.6279.7 ± 1.140Ar-39ArIntergrated age of Cornubian BatholithbiotiteCORN-158A    292019Haytor Quarry, Ilsington, Teignbridge, Devon, England, UKHaytor QuarryChen et al (1993)10.1144/gsjgs.150.6.1183JGSL150_1183Analytical data for micas

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