Mineral name Structural Groups IMA Formula Max Age (Ma) Min Age (Ma) # of Sublocalities containing mineral LOCALITY IDs, not mindat ids # of localities containing mineral Actinolite (*) Amphibole Ca2 (Mg4.5-2.5 Fe2+ 0.5-2.5 )Si8 O22 (OH)2 298 266 1 120328 3419 Anglesite (*) Baryte Pb(SO4 ) 260 260 1 120310 2734 Aragonite (*) Aragonite Ca(CO3 ) 4 120286 ,120304 ,120305 ,120330 3250 Arsenolite (*) Arsenolite As2 O3 750 42 1 120360 231 Arsenopyrite (*) Arsenopyrite FeAsS 260 260 3 120283 ,120297 ,120310 9052 Axinite-(Fe) (*) Axinite Ca4 Fe2+ 2 Al4 [B2 Si8 O30 ](OH)2 298 266 1 120328 260 Baryte (*) Baryte Ba(SO4 ) 260 260 4 120296 ,120301 ,120308 ,120310 11547 Beryl (*) Beryl Be3 Al2 Si6 O18 1 120336 4286 Bindheimite (*) Pyrochlore Pb2 Sb5+ 2 O7 260 260 1 120310 450 Bismuth (*) Arsenic Bi 750 42 2 120325 ,120360 1966 Bornite (*) None Cu5 FeS4 2 120358 ,120362 5516 Bournonite (*) Bournonite CuPbSbS3 1 120301 1089 Calcite (*) Calcite Ca(CO3 ) 260 260 5 120286 ,120303 ,120304 ,120310 ,120330 27770 Cassiterite (*) Rutile SnO2 284 272 13 120287 ,120306 ,120324 ,120325 ,120327 ,120331 ,120345 ,120347 ,120349 ,120350 ,120352 ,120359 ,120361 5171 Cerussite (*) Aragonite Pb(CO3 ) 260 260 3 120308 ,120310 ,120330 4979 Chalcocite (*) None Cu2 S 2 120358 ,120362 5707 Chalcopyrite (*) Chalcopyrite CuFeS2 750 42 8 120283 ,120286 ,120287 ,120297 ,120310 ,120358 ,120360 ,120362 27198 Cobaltite (*) Cobaltite CoAsS 750 42 1 120360 966 Coffinite (*) Zircon U(SiO4 )·nH2 O 750 42 1 120360 566 Datolite (*) Gadolinite CaB(SiO4 )(OH) 298 266 1 120328 498 Dolomite (*) None CaMg(CO3 )2 4 120286 ,120304 ,120305 ,120330 9895 Erythrite (*) Vivianite Co3 (AsO4 )2 ·8H2 O 750 42 3 120360 ,120361 ,120362 814 Fluorite (*) Fluorite CaF2 3 120358 ,120361 ,120362 9617 Galena (*) Rocksalt PbS 750 42 4 120308 ,120310 ,120330 ,120360 24243 Goethite (*) Diaspore FeO(OH) 260 260 3 120286 ,120310 ,120330 7437 Gold (*) Copper Au 1 120306 30554 Goslarite (*) Epsomite Zn(SO4 )·7H2 O 1 120298 188 Gypsum (*) Gypsum Ca(SO4 )·2H2 O 1 120330 6890 Hastingsite (*) Amphibole NaCa2 (Fe2+ 4 Fe3+ )(Si6 Al2 )O22 (OH)2 298 266 1 120328 209 Hausmannite (*) Spinel Mn2+ Mn3+ 2 O4 1 120315 350 Hematite (*) Corundum Fe2 O3 284 272 23 120286 ,120292 ,120293 ,120294 ,120295 ,120300 ,120303 ,120304 ,120306 ,120317 ,120320 ,120321 ,120324 ,120325 ,120331 ,120336 ,120338 ,120340 ,120347 ,120349 ,120350 ,120352 ,120362 14640 Hydrozincite (*) None Zn5 (CO3 )2 (OH)6 1 120330 1066 Johannsenite (*) Pyroxene CaMnSi2 O6 298 266 1 120328 73 Linarite (*) Linarite CuPb(SO4 )(OH)2 260 260 2 120308 ,120310 987 Magnetite (*) Spinel Fe2+ Fe3+ 2 O4 298 266 2 120306 ,120328 14899 Malachite (*) Malachite Cu2 (CO3 )(OH)2 3 120286 ,120358 ,120362 12537 Manganosite (*) Rocksalt MnO 1 120315 73 Mimetite (*) Apatite Pb5 (AsO4 )3 Cl 260 260 1 120310 1107 Muscovite (*) Mica Clay KAl2 (Si3 Al)O10 (OH)2 1 120361 17380 Nickelskutterudite (*) Skutterudite Perovskite (Ni,Co,Fe)As3 1 120302 176 Opal (*) Amorphous SiO2 ·n H2 O 1 120336 2994 Orthoclase (*) Feldspar K(AlSi3 O8 ) 1 120322 2349 Pyrite (*) Pyrite FeS2 260 260 6 120283 ,120297 ,120310 ,120315 ,120330 ,120362 39462 Pyrochroite (*) Brucite Mn2+ (OH)2 1 120315 56 Pyrolusite (*) Rutile MnO2 1 120309 3106 Pyromorphite (*) Apatite Pb5 (PO4 )3 Cl 260 260 1 120310 1725 Quartz (*) Quartz SiO2 750 42 16 120296 ,120299 ,120301 ,120310 ,120327 ,120328 ,120330 ,120335 ,120344 ,120347 ,120350 ,120353 ,120358 ,120360 ,120362 ,120367 61156 Rammelsbergite (*) Löllingite NiAs2 750 42 1 120360 233 Rhodochrosite (*) Calcite Mn(CO3 ) 1 120315 1711 Rhodonite (*) Rhodonite CaMn3 Mn(Si5 O15 ) 1 120309 969 Schorl (*) Tourmaline NaFe2+ 3 Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH) 284 272 3 120296 ,120299 ,120347 2705 Siderite (*) Calcite Fe(CO3 ) 298 260 7 120286 ,120296 ,120308 ,120310 ,120328 ,120358 ,120362 6417 Sphalerite (*) Sphalerite ZnS 260 260 5 120310 ,120330 ,120358 ,120361 ,120362 21482 Sulphur (*) Sulphur S 1 120330 2045 Tetrahedrite-(Zn) (*) Tetrahedrite Cu6 (Cu4 Zn2 )Sb4 S13 260 260 1 120310 5317 Tremolite (*) Amphibole Ca2 (Mg5.0-4.5 Fe2+ 0.0-0.5 )Si8 O22 (OH)2 298 266 1 120328 2562 Tyrolite (*) Tyrolite Ca2 Cu9 (AsO4 )4 (CO3 )(OH)8 ·11H2 O 1 120361 245 Uraninite (*) Fluorite UO2 750 42 1 120360 2718
Excel ID Max Age (Ma) Min Age (Ma) Age as listed in reference Dating Method Age Interpret Prioritized? Sample Source Sample Num Run Num Age from other Locality Dated Mineral Minerals explicitely stated as having this age Age applies to these Elements MinDat Locality ID Dated Locality (Max Age) Location as listed in reference Reference Reference DOI Reference ID Age Notes Edit Lucy_040a 281 279 280 ± 1 Rb-Sr Preferred Age determined in study E 38425, E 38426, E 38427, E 38429, E 38430, E 420 Yes 1620 Devon, England, UK Dartmoor Granite Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Edit Lucy_040b 280 280 280 Rb-Sr Preliminary examindation yields age of Dartmoor as the second episode of Hercynian Magmatism. Yes 1620 Devon, England, UK Dartmoor Granite Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Statistically 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. Edit Lucy_040c 288 274 281 ± 7 K-Ar Previous age stated for the Dartmoor Granite Yes 1620 Devon, England, UK Dartmoor Granite Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 In complete aggreement with the plateau ages of the 282 Ma for the Coombestone Tor and Gidleigh Tor. Edit sedcu-00415 260 260 U. Permian Cu 34103 Wheal Exmouth, Christow, Teignbridge, Devon, England, UK Exmouth Cox et al. (2003) USGSOFR03_107 Edit Lucy_194 298 298 298 K-Ar Previous age stated, recalculated from the 305 quoted by Mayne et al. biotite 1520 Haytor Mine, Ilsington, Teignbridge, Devon, England, UK Haytor Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs) Edit Lucy_195 276 266 271 ± 5 K-Ar Previous stated isotopic age biotite 1520 Haytor Mine, Ilsington, Teignbridge, Devon, England, UK Haytor Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs) Edit Lucy_196 282 272 277 ± 5 Rb-Sr Previous stated isotopic age biotite 1520 Haytor Mine, Ilsington, Teignbridge, Devon, England, UK Haytor Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs) Edit Lucy_197 285 275 290 K-Ar Previous stated isotopic age biotite 1520 Haytor Mine, Ilsington, Teignbridge, Devon, England, UK Haytor Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs) Edit Lucy_198 290 270 280 ± 10 K-Ar Average of above stated previous stated isotopic age biotite 1520 Haytor Mine, Ilsington, Teignbridge, Devon, England, UK Haytor Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 Isotopic ages on the granites and associated rocks of South-West England, data of previous workers (in m.yrs) Edit Lucy_048 280 276 278 ± 2 Rb-Sr Age granite intruded E 44794, E 44794 KFeldspar, E 44794 Plag., E 44794 292019 Haytor Quarry, Ilsington, Teignbridge, Devon, England, UK Haytor West Quarry Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Isochron for minerals seperated from the Haytor West specimen, this age is within the error of the whole rock. Edit Lucy_180 287 285 287 - 285 Pb-U/Pb-Pb Range of ages given with 206Pb/238U, 207Pb/235U and 207Pb/206Pb. whole rock CORN-158A (15,16) 292019 Haytor Quarry, Ilsington, Teignbridge, Devon, England, UK Haytor Quarry Chen et al (1993) 10.1144/gsjgs.150.6.1183 JGSL150_1183 Analytical data for igneous monazites with sample and (analysis) numbers Edit Lucy_181 282.4 280.6 281.5 ± 0.9 40Ar-39Ar Intergrated age of Cornubian Batholith muscovite CORN-158A Muscovite 292019 Haytor Quarry, Ilsington, Teignbridge, Devon, England, UK Haytor Quarry Chen et al (1993) 10.1144/gsjgs.150.6.1183 JGSL150_1183 Analytical data for micas Edit Lucy_182 280.8 278.6 279.7 ± 1.1 40Ar-39Ar Intergrated age of Cornubian Batholith biotite CORN-158A 292019 Haytor Quarry, Ilsington, Teignbridge, Devon, England, UK Haytor Quarry Chen et al (1993) 10.1144/gsjgs.150.6.1183 JGSL150_1183 Analytical data for micas Edit Lucy_067 284 272 278 ± 6 Ar-Ar Age of sericite bordering of Wall’s Lode (Sn) 32192 Birch Tor & Vitifer Mine, Warren House, North Bovey, Teignbridge, Devon, England, UK Birch Tor and Vitifer Mine LeBoutillier et al. (2003) GSWE10_403 Edit Lucy_234 211 201 206 ± 5 206 Pb/238U Age of Pitchblende-Coffinite 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK King's Wood Darnley et al. (1965) MM34_159 Edit Lucy_249 458 78 268 ± 190 207Pb/206Pb Isotopic Age of Pitchblende-Coffinite NCL1030 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK King's Wood Darnley et al. (1965) MM34_159 (Ages taken from table with unclear titles) Chemical analysis of Pb. Analysis of 204Pb. Edit Lucy_250 211 201 206 ± 5 206Pb/238U Isotopic Age of Pitchblende-Coffinite NCL1030 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK King's Wood Darnley et al. (1965) MM34_159 (Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 206Pb. Edit Lucy_251 231 191 211 ± 20 207Pb/235U Isotopic Age of Pitchblende-Coffinite NCL1030 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK King's Wood Darnley et al. (1965) MM34_159 (Ages taken from table with unclear titles) Chemical analysis of U. Analysis of 207Pb. Edit Lucy_263 52 42 206 ± 5 206Pb/238U Using Pockleys Interpretations, it is acceptable to say that South Terras, Geevor, and Wheal Owles are not reliable indications of Tertiary mineralization. 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK King's Wood Darnley et al. (1965) MM34_159 Edit Lucy_264a 340 340 340 The over-all conclusion is that supergene alteration cannot explain the pattern of results obtained in paper. 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK Wheal Bray Darnley et al. (1965) MM34_159 Chemical Age of the pitchblende vein at depth Edit Lucy_264b 750 750 750 The over-all conclusion is that supergene alteration cannot explain the pattern of results obtained in paper. 1516 Kingswood Mine, West Buckfastleigh, Teignbridge, Devon, England, UK Wheal Bray Darnley et al. (1965) MM34_159 Chemical Age of the pitchblende vein outcrop (in an unpublished analysis).
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