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| A | This mineral is Anthropogenic. |
| G | This mineral is directly dated. |
| B | This mineral is reported as having this age. |
| Y | This mineral is using an age reported as an element mineralization period. |
| O | This mineral is using an age calculated from all data at the locality. |
| R | The age displayed for this mineral originates from a different, non-child locality. |
| P | The 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. |
| Amorphous | Andalusite | Apatite | Beryl | Clay | Feldspar | Fluorite | Kaolinite | Mica | None |
| Pharmacosiderite | Quartz | Rutile | Sphalerite | Stannite | Talc | Topaz | Tourmaline | Wavellite |
| 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 |
|---|---|---|---|---|---|---|---|
| Beryl (*) | Beryl | Be3Al2Si6O18 | 313 | 253.1 | 1 | 119132 | 4286 |
| Cassiterite (*) | Rutile | SnO2 | 324.9 | 245.9 | 5 | 119132,119133,119134,119135,119138 | 5171 |
| Chalcocite (*) | None | Cu2S | 324.9 | 245.9 | 1 | 119135 | 5707 |
| Fluorapatite (*) | Apatite | Ca5(PO4)3F | 313 | 253.1 | 1 | 119132 | 2740 |
| Fluorite (*) | Fluorite | CaF2 | 313 | 253.1 | 2 | 119132,119134 | 9617 |
| Hydroxylapatite (*) | Apatite | Ca5(PO4)3OH | 1 | 119134 | 367 | ||
| Kaolinite (*) | Clay Kaolinite | Al2Si2O5(OH)4 | 324.9 | 245.9 | 3 | 119132,119134,119135 | 5591 |
| Muscovite (*) | Mica Clay | KAl2(Si3Al)O10(OH)2 | 289.8 | 253.1 | 1 | 119132 | 17380 |
| Olivenite (*) | Andalusite | Cu2(AsO4)(OH) | 324.9 | 245.9 | 2 | 119134,119135 | 492 |
| Opal (*) | Amorphous | SiO2·nH2O | 1 | 119136 | 2994 | ||
| Orthoclase (*) | Feldspar | K(AlSi3O8) | 313 | 253.1 | 1 | 119132 | 2349 |
| Pharmacosiderite (*) | Pharmacosiderite | KFe3+4(AsO4)3(OH)4·6-7H2O | 324.9 | 245.9 | 2 | 119134,119135 | 428 |
| Quartz (*) | Quartz | SiO2 | 324.9 | 245.9 | 2 | 119132,119135 | 61156 |
| Schorl (*) | Tourmaline | NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH) | 324.9 | 245.9 | 3 | 119133,119134,119135 | 2705 |
| Scorodite (*) | None | Fe3+(AsO4)·2H2O | 324.9 | 245.9 | 1 | 119135 | 1153 |
| Sphalerite (*) | Sphalerite | ZnS | 313 | 253.1 | 1 | 119132 | 21482 |
| Stannite (*) | Stannite Sphalerite | Cu2FeSnS4 | 313 | 253.1 | 1 | 119132 | 668 |
| Talc (*) | Clay Talc | Mg3Si4O10(OH)2 | 324.9 | 245.9 | 1 | 119135 | 3337 |
| Tenorite (*) | None | CuO | 324.9 | 245.9 | 1 | 119135 | 1101 |
| Topaz (*) | Topaz | Al2SiO4F2 | 324.9 | 245.9 | 3 | 119132,119134,119135 | 1476 |
| Torbernite (*) | None | Cu(UO2)2(PO4)2·12H2O | 1 | 119134 | 1059 | ||
| Wavellite (*) | Wavellite | Al3(PO4)2(OH)3·5H2O | 324.9 | 245.9 | 2 | 119134,119135 | 374 |
| 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lucy_105 | 276.9 | 272.7 | 274.8 ± 2.1 [± 1 std. error mean] | K/Ar | Fifty-four new K/Ar age determinations for micas from fresh granitic rock | mica | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.2113/gsecongeo.78.6.1064 | EG78_1064 | Arithmetic mean of all data sets of muscovite and biotite ages | ||||||||
| Lucy_106 | 275.9 | 266.9 | 271.4 ± 4.5 | K/Ar | Greisens adjacent to sheeted quartz-tourmaline veins | mica | 140, 141, 196, 197, 198. | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | Arithmetic mean of each sample except 141 | |||||||
| Lucy_107 | 272.7 | 269.1 | 270.9 ± 1.8 | K/Ar | Metafelsite dikes which conspicuously crosscut sheeted veins but which are themselves hydrothermally metamorphosed to a quartz-muscovite-kaolinite assemblages. | mica | 206, 213, 214, 218, 221. | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | Arithmetic mean of each sample | |||||||
| Lucy_108 | 276.3 | 272.1 | 274.2 ± 2.1 | K/Ar | mica | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | Various size fractions separated from completely kaolinized granit | |||||||||
| Lucy_109a | 313 | 289 | 301 ± 12 | K/Ar | Range between granite crystallisation (301 ± 12) and closure temperature of 250oC | mica | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | Since evidence suggests that secondary muscovite and kaolinitc in metafelsite dikes and kaolinized granite are significantly cogenetic, these data and the geologic relationships indicate that sheeted vein mineralization, greisenization, and kaolinization were simultaneous processes which occurred in the time interval between granite crystallization at 301±12 m.y. (whole-rock Rb/Sr isochron for the St. Austell granite) and cooling below a mica closure temperature of '~250oC at 273.6±1.1 m.y. (pooled K-Ar age based on 50 acceptable values). | ||||||||
| Lucy_109b | 274.7 | 272.5 | 273.6 ± 1.1 | K/Ar | Range between granite crystallisation (301 ± 12) and closure temperature of 250oC | mica | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | Since evidence suggests that secondary muscovite and kaolinitc in metafelsite dikes and kaolinized granite are significantly cogenetic, these data and the geologic relationships indicate that sheeted vein mineralization, greisenization, and kaolinization were simultaneous processes which occurred in the time interval between granite crystallization at 301±12 m.y. (whole-rock Rb/Sr isochron for the St. Austell granite) and cooling below a mica closure temperature of '~250oC at 273.6±1.1 m.y. (pooled K-Ar age based on 50 acceptable values). | ||||||||
| Lucy_110 | 282 | 278 | 280 ± 2 | Rb/Sr | Age of felsite intrusion and sheeted vein mineralisatinon. | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | These dates are consistent with an estimate of 280 ± 2 m.y., based on five Rb/Sr age determinations, for the time of felsite dike intrusion and sheeted vein mineralization. | |||||||||
| Lucy_111a | 261.7 | 253.1 | 257.4 ± 4.3 | K/Ar | Stated age of muscovites | muscovite | 187 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_111b | 269.6 | 260.6 | 265.1 ± 4.5 | K/Ar | Stated age of muscovites | muscovite | 187 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_112a | 283.2 | 274.6 | 285.2 ± 4.6 | K/Ar | Stated age of muscovites | muscovite | 262 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_112b | 289.8 | 280.6 | 266.3 ± 4.3 | K/Ar | Stated age of biotite | biotite | 262 | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||
| Lucy_113a | 270.6 | 262 | 277.1 ± 4.3 | K/Ar | Stated age of biotite | biotite | 187 | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||
| Lucy_113b | 281.3 | 272.9 | 278.9 ± 4.3 | K/Ar | Stated age of biotite | biotite | 187 | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||
| Lucy_114a | 266.1 | 257.7 | 261.9 ± 4.2 | K/Ar | Stated age of muscovites | muscovite | 188 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_114b | 266.1 | 257.7 | 273.4 ± 4.5 | K/Ar | Stated age of muscovites | muscovite | 188 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_114c | 277.9 | 268.9 | 280.0 ± 4.5 | K/Ar | Stated age of muscovites | muscovite | 247 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_114d | 282.9 | 274.1 | 278.5 ± 4.4 | K/Ar | Stated age of muscovites | muscovite | 247 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_115a | 284.2 | 275.2 | 279.7 ± 4.5 | K/Ar | Stated age of muscovites | muscovite | 248 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_115b | 289.8 | 280.6 | 285.2 ± 4.6 | K/Ar | Stated age of muscovites | muscovite | 248 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_115c | 283.3 | 274.3 | 278.8 ± 4.5 | K/Ar | Stated age of muscovites | muscovite | 248 | Muscovite | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | ||||||
| Lucy_115d | 280.8 | 272.2 | 276.5 ± 4.3 | K/Ar | Stated age of biotite | biotite | 186 | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||
| Lucy_115e | 281.6 | 273 | 277.3 ± 4.3 | K/Ar | Stated age of biotite | biotite | 186 | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||
| Lucy_115f | 280.8 | 272.2 | 276.5 ± 4.3 | K/Ar | Arithmetic mean ± standard error of the mean (muscovites) | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||||
| Lucy_115g | 280.8 | 272.2 | 276.5 ± 4.3 | K/Ar | Arithmetic mean ± standard error of the mean (biotites) | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||||
| Lucy_115h | 280.8 | 272.2 | 276.5 ± 4.3 | K/Ar | Arithmetic mean ± standard error of the mean (all data) | 1189 | Goonbarrow China Clay Pit, Bugle, Treverbyn, Cornwall, England, UK | Goonbarrow China Clay Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | New and Previous K/Ar and Rb/Sr Age Determinations for Hercynian Granitic Rocks and Felsite Dikes (Elvans) in Southwest England | |||||||||
| Lucy_132f | 263.8 | 255.4 | 259.6 ± 4.2 | K/Ar | New K/Ar determination | 196 | 1190 | Imperial Goonbarrow China Clay Works, Bugle, Treverbyn, Cornwall, England, UK | Imperial Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_132g | 271 | 262.2 | 266.6 ± 4.4 | K/Ar | New K/Ar determination | 196 | 1190 | Imperial Goonbarrow China Clay Works, Bugle, Treverbyn, Cornwall, England, UK | Imperial Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_143a | 287.1 | 277.9 | 282.5 ± 4.6 | K/Ar | New K/Ar ages of Kaolinized granite | 501 | 1190 | Imperial Goonbarrow China Clay Works, Bugle, Treverbyn, Cornwall, England, UK | Imperial Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_143b | 296.4 | 287 | 291.7 ± 4.7 | K/Ar | New K/Ar ages of Kaolinized granite | 501 | 1190 | Imperial Goonbarrow China Clay Works, Bugle, Treverbyn, Cornwall, England, UK | Imperial Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_132b | 277.7 | 269.7 | 273.7 ± 4 | K/Ar | New K/Ar determination | 140 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_132c | 324.9 | 315.3 | 320.1 ± 4.8 | K/Ar | New K/Ar determination | 141 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_132d | 320.4 | 310.8 | 315.6 ± 4.8 | K/Ar | New K/Ar determination | 141 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_132e | 305.5 | 296.3 | 300.9 ± 4.6 | K/Ar | New K/Ar determination | 141 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_141a | 277.1 | 268.1 | 272.6 ± 4.5 | K/Ar | New K/Ar ages of Kaolinized granite | 263 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_141b | 285.7 | 277.1 | 281.4 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 500 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_141c | 282.2 | 273.6 | 277.9 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 500 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_141d | 267.1 | 258.5 | 262.8 ± 4.2 | K/Ar | New K/Ar ages of Kaolinized granite | 263 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam Mine | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142a | 273.2 | 264.6 | 268.9 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142b | 253.9 | 245.9 | 249.9 ± 4.0 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142c | 270.2 | 261.6 | 265.9 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142d | 266.2 | 257.8 | 262.0 ± 4.2 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142e | 270.6 | 262 | 266.3 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142f | 273.1 | 264.5 | 268.8 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 | |||||||||
| Lucy_142g | 273.2 | 264.6 | 268.9 ± 4.3 | K/Ar | New K/Ar ages of Kaolinized granite | 265 | 967 | Old Beam Mine (Great Beam Mine), Bugle, Treverbyn, Cornwall, England, UK | Old Beam-East Goonbarrow | Bray and Spooner (1983) | 10.1144/GSL.SP.1964.001.01.15 | EG78_1064 |
| Sample | Source Locality | Reference URL |
|---|---|---|
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