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:
Tregrehan Mine, Wheal Eliza Consols, Par Valley Mine, St Austell, Cornwall, England, UK

Oldest recorded age at locality: 311
Youngest recorded age at locality: 273

mindat Locality ID: 221810
mindat URL: http://www.mindat.org/loc-221810.html

Tectonic Settings:

Total number of sublocalities beneath "Tregrehan Mine, Wheal Eliza Consols, Par Valley Mine, St Austell, Cornwall, England, UK": 0
Total number of bottom-level sublocalities: 0

Latitude: 50°20'39"N
Longitude: 4°45'23"W
Decimal Degree (lat, lon): 50.344166666667,-4.7563888888889
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: O Sn 

Elements from minerals reported directly at this locality: O Sn 

Structural Groups for minerals in this locality: 
NoneRutile

1 IMA Minerals at location:
Cassiterite  (*)
Mineral nameStructural GroupsIMA FormulaMax Age (Ma)Min Age (Ma)# of Sublocalities containing mineralLOCALITY IDs, not mindat ids# of localities containing mineral
Cassiterite  (*)RutileSnO231127305171


6 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_027a311285298 ± 13Rb-SrAge granite intruded MR 29628, E 35053, E 35051, E 35052, MR 30149, MR  Yes  222082St Austell, Cornwall, England, UKSt Austell graniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159Age stated from earlier paper
Lucy_027b289281285 ± 4Rb-SrPreferred Age determined in studyhigh MR 29628, E 35053, E 35051, E 35052, MR 30149, MR  Yes  222082St Austell, Cornwall, England, UKSt Austell graniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_11598 samples have been reanalysed. Regression of all the data gives an age of 285 ± 4
Lucy_027c294282288 ± 6Rb-SrAge granite intruded MR 29628, E 35053, E 35051, MR 30149, MR 30150, MR Yes  222082St Austell, Cornwall, England, UKSt Austell graniteDarbyshire et al. (1985)10.1144/gsjgs.142.6.1159JGSL142_1159Omitting the lithium mica granite sample from the regression makes little difference to the value of the age and intercept but beecause of the reduced spread in Rb/Sr ratiosn the errors are slightly increased.
Lucy_027d296284290Rb-SrPreliminary examindation yields age of St Austells granite as the first episode of Hercynian Magmatism.   Yes  222082St Austell, Cornwall, England, UKSt Austell 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_028301275288 ± 13Rb/SrAge for granitewhole rock  Yes  222082St Austell, Cornwall, England, UKSt Austell graniteHawkes et al. (1978 US4_52 
Lucy_029297273285 ± 1287Sr/86SrAge for granite   Yes  222082St Austell, Cornwall, England, UKSt Austell graniteHawkes et al. (1978) US4_52 

SampleSource LocalityReference URL

All locality data graciously provided by mindat.org

All age data...

Other copyright data...