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 Acanthite (*) Acanthite Ag2 S 2 120227 ,120542 2793 Actinolite (*) Amphibole Ca2 (Mg4.5-2.5 Fe2+ 0.5-2.5 )Si8 O22 (OH)2 308 176 8 120171 ,120176 ,120328 ,120399 ,120558 ,120560 ,120567 ,120585 3419 Aikinite (*) Meneghinite CuPbBiS3 1 120567 315 Albite (*) Feldspar Na(AlSi3 O8 ) 295 249 4 120389 ,120558 ,120563 ,120567 8803 Algodonite (*) Not in a structural group Cu1-x Asx (x ≈ 0.15) 252 176 1 120171 41 Allanite-(Ce) (*) Allanite Epidote CaCe(Al2 Fe2+ )[Si2 O7 ][SiO4 ]O(OH) 1 120567 706 Allophane (*) Allophane Al2 O3 (SiO2 )1.3-2.0 ·2.5-3.0H2 O 308 284 7 120223 ,120381 ,120432 ,120485 ,120496 ,120559 ,120568 470 Aluminite (*) Aluminite Al2 (SO4 )(OH)4 ·7H2 O 308 284 1 120560 78 Amblygonite (*) None LiAl(PO4 )F 281 249 1 120558 244 Anatase (*) Not in a structural group TiO2 308 176 13 120171 ,120439 ,120473 ,120474 ,120481 ,120482 ,120494 ,120495 ,120496 ,120560 ,120566 ,120604 ,120605 2162 Andalusite (*) Andalusite Al2 SiO5 3 120268 ,120398 ,120506 1310 Andersonite (*) Not in a structural group Na2 Ca(UO2 )(CO3 )3 ·5-6H2 O 281 279 1 120459 47 Andradite (*) Garnet Ca3 Fe3+ 2 (SiO4 )3 308 284 3 120399 ,120559 ,120560 1534 Anglesite (*) Baryte Pb(SO4 ) 260 260 6 120310 ,120404 ,120405 ,120409 ,120410 ,120541 2734 Ankerite (*) None Ca(Fe2+ ,Mg)(CO3 )2 9 120223 ,120226 ,120227 ,120228 ,120236 ,120238 ,120377 ,120381 ,120385 3092 Annabergite (*) Vivianite Ni3 (AsO4 )2 ·8H2 O 252 176 1 120171 445 Annite (*) Mica Clay KFe2+ 3 (AlSi3 O10 )(OH)2 293 260 1 120604 356 Anthophyllite (*) Amphibole Mg2 Mg5 Si8 O22 (OH)2 1 120596 718 Antimony (*) Arsenic Sb 281 249 1 120558 363 Aragonite (*) Aragonite Ca(CO3 ) 270 176 28 120171 ,120194 ,120210 ,120213 ,120221 ,120223 ,120226 ,120227 ,120228 ,120229 ,120230 ,120231 ,120234 ,120236 ,120237 ,120238 ,120286 ,120304 ,120305 ,120330 ,120373 ,120374 ,120381 ,120383 ,120386 ,120394 ,120409 ,120490 3250 Arsenic (*) Arsenic As 281 249 1 120558 379 Arseniosiderite (*) Arseniosiderite Ca2 Fe3+ 3 O2 (AsO4 )3 ·3H2 O 1 120574 194 Arsenolite (*) Arsenolite As2 O3 750 42 6 120360 ,120484 ,120493 ,120494 ,120558 ,120568 231 Arsenopyrite (*) Arsenopyrite FeAsS 308 249 45 120249 ,120250 ,120251 ,120254 ,120255 ,120283 ,120297 ,120310 ,120399 ,120400 ,120410 ,120438 ,120439 ,120473 ,120474 ,120475 ,120480 ,120481 ,120482 ,120484 ,120486 ,120487 ,120488 ,120490 ,120492 ,120493 ,120494 ,120495 ,120497 ,120498 ,120501 ,120510 ,120539 ,120540 ,120541 ,120542 ,120557 ,120558 ,120559 ,120560 ,120563 ,120567 ,120582 ,120595 ,120605 9052 Atacamite (*) Atacamite Cu2 Cl(OH)3 252 176 1 120171 544 Aurichalcite (*) None (Zn,Cu)5 (CO3 )2 (OH)6 1 120238 919 Autunite (*) Autunite Ca(UO2 )2 (PO4 )2 ·10-12H2 O 293 249 3 120459 ,120558 ,120604 1272 Axinite-(Fe) (*) Axinite Ca4 Fe2+ 2 Al4 [B2 Si8 O30 ](OH)2 308 249 4 120328 ,120399 ,120558 ,120560 260 Azurite (*) Not in a structural group Cu3 (CO3 )2 (OH)2 252 176 6 120171 ,120223 ,120230 ,120385 ,120404 ,120474 5509 Baryte (*) Baryte Ba(SO4 ) 260 176 13 120171 ,120178 ,120181 ,120240 ,120296 ,120301 ,120308 ,120310 ,120371 ,120374 ,120394 ,120531 ,120567 11547 Bavenite (*) None Ca4 Be2+x Al2-x Si9 O26-x (OH)2+x (x = 0 to 1) 308 249 2 120558 ,120560 255 Beaverite-(Cu) (*) Alunite Pb(Fe3+ 2 Cu)(SO4 )2 (OH)6 1 120510 132 Bementite (*) Clay Mn7 Si6 O15 (OH)8 1 120548 173 Beryl (*) Beryl Be3 Al2 Si6 O18 281 249 3 120336 ,120389 ,120558 4286 Beryllonite (*) Beryllonite NaBe(PO4 ) 281 249 1 120558 47 Bindheimite (*) Pyrochlore Pb2 Sb5+ 2 O7 260 260 1 120310 450 Bismite (*) None Bi2 O3 1 120567 214 Bismuth (*) Arsenic Bi 750 42 6 120238 ,120325 ,120360 ,120400 ,120560 ,120567 1966 Bismuthinite (*) Stibnite Bi2 S3 308 284 3 120482 ,120560 ,120567 1935 Bismutite (*) Bismutite Bi2 O2 (CO3 ) 1 120238 716 Boltwoodite (*) None (K,Na)(UO2 )(SiO3 OH)·1.5H2 O 281 279 1 120459 67 Bornite (*) None Cu5 FeS4 308 176 10 120171 ,120213 ,120227 ,120240 ,120358 ,120362 ,120370 ,120422 ,120495 ,120559 5516 Boulangerite (*) None Pb5 Sb4 S11 1 120276 843 Bournonite (*) Bournonite CuPbSbS3 3 120276 ,120301 ,120402 1089 Brochantite (*) Brochantite Cu4 (SO4 )(OH)6 11 120227 ,120228 ,120240 ,120259 ,120377 ,120381 ,120474 ,120476 ,120496 ,120541 ,120567 1633 Brookite (*) Brookite TiO2 308 284 2 120439 ,120560 700 Bustamite (*) Wollastonite Mn2 Ca2 MnCa(Si3 O9 )2 308 284 1 120560 101 Cacoxenite (*) None Fe3+ 24 AlO6 (PO4 )17 (OH)12 ·75H2 O 1 120198 280 Calcite (*) Calcite Ca(CO3 ) 308 176 51 120167 ,120169 ,120171 ,120175 ,120178 ,120181 ,120182 ,120183 ,120184 ,120194 ,120211 ,120213 ,120219 ,120221 ,120223 ,120226 ,120227 ,120228 ,120229 ,120230 ,120231 ,120232 ,120234 ,120236 ,120237 ,120238 ,120244 ,120286 ,120303 ,120304 ,120310 ,120330 ,120371 ,120373 ,120374 ,120377 ,120381 ,120383 ,120385 ,120386 ,120391 ,120399 ,120402 ,120541 ,120548 ,120557 ,120558 ,120560 ,120582 ,120584 ,120591 27770 Carbonatecyanotrichite (*) Cyanotrichite Cu4 Al2 (CO3 )(OH)12 ·2H2 O 1 120496 88 Carnotite (*) None K2 (UO2 )2 (VO4 )2 ·3H2 O 252 176 1 120171 1184 Cassiterite (*) Rutile SnO2 284 272 51 120250 ,120251 ,120252 ,120253 ,120254 ,120255 ,120261 ,120266 ,120267 ,120273 ,120287 ,120306 ,120324 ,120325 ,120327 ,120331 ,120345 ,120347 ,120349 ,120350 ,120352 ,120359 ,120361 ,120439 ,120448 ,120449 ,120451 ,120453 ,120455 ,120456 ,120460 ,120461 ,120463 ,120466 ,120473 ,120476 ,120489 ,120492 ,120495 ,120497 ,120498 ,120509 ,120512 ,120527 ,120533 ,120536 ,120541 ,120542 ,120567 ,120571 ,120576 5171 Celestine (*) Baryte Sr(SO4 ) 2 120167 ,120175 1252 Cerussite (*) Aragonite Pb(CO3 ) 270 260 11 120308 ,120310 ,120330 ,120373 ,120402 ,120404 ,120405 ,120409 ,120410 ,120540 ,120541 4979 Chalcoalumite (*) Chalcoalumite CuAl4 (SO4 )(OH)12 ·3H2 O 1 120496 91 Chalcocite (*) None Cu2 S 252 176 18 120171 ,120210 ,120213 ,120223 ,120226 ,120227 ,120228 ,120230 ,120231 ,120238 ,120240 ,120358 ,120362 ,120377 ,120385 ,120422 ,120496 ,120582 5707 Chalcophyllite (*) Chalcophyllite Cu18 Al2 (AsO4 )4 (SO4 )3 (OH)24 ·36H2 O 1 120474 194 Chalcopyrite (*) Chalcopyrite CuFeS2 750 42 68 120171 ,120208 ,120209 ,120213 ,120223 ,120226 ,120227 ,120228 ,120230 ,120231 ,120238 ,120240 ,120244 ,120250 ,120259 ,120283 ,120286 ,120287 ,120297 ,120310 ,120358 ,120360 ,120362 ,120370 ,120373 ,120377 ,120381 ,120383 ,120385 ,120386 ,120388 ,120394 ,120399 ,120422 ,120438 ,120439 ,120482 ,120483 ,120484 ,120486 ,120490 ,120492 ,120493 ,120495 ,120496 ,120497 ,120498 ,120500 ,120501 ,120503 ,120512 ,120513 ,120520 ,120539 ,120541 ,120550 ,120558 ,120559 ,120560 ,120563 ,120567 ,120574 ,120578 ,120582 ,120588 ,120591 ,120595 ,120602 27198 Chalcosiderite (*) Turquoise CuFe3+ 6 (PO4 )4 (OH)8 ·4H2 O 1 120474 77 Chamosite (*) Chlorite Clay (Fe2+ ,Mg,Al,Fe3+ )6 (Si,Al)4 O10 (OH,O)8 308 284 1 120560 577 Childrenite (*) Childrenite Fe2+ Al(PO4 )(OH)2 ·H2 O 17 120402 ,120477 ,120478 ,120479 ,120482 ,120483 ,120486 ,120492 ,120493 ,120495 ,120496 ,120500 ,120502 ,120503 ,120508 ,120510 ,120540 93 Chrisstanleyite (*) Chrisstanleyite Ag2 Pd3 Se4 270 270 1 120373 6 Clausthalite (*) Rocksalt PbSe 270 176 2 120171 ,120373 281 Clinoclase (*) None Cu3 (AsO4 )(OH)3 1 120474 127 Cobaltite (*) Cobaltite CoAsS 750 42 2 120360 ,120567 966 Coffinite (*) Zircon U(SiO4 )·nH2 O 750 42 4 120170 ,120171 ,120180 ,120360 566 Columbite-(Mn) (*) Columbite Mn2+ Nb2 O6 281 249 1 120558 289 Connellite (*) Connellite Cu36 (SO4 )(OH)62 Cl8 ·6H2 O 1 120240 295 Copper (*) Copper Cu 252 176 8 120171 ,120240 ,120385 ,120432 ,120474 ,120496 ,120542 ,120602 3846 Cordierite (*) Beryl Mg2 Al4 Si5 O18 281 249 1 120558 1008 Cornubite (*) None Cu5 (AsO4 )2 (OH)4 3 120474 ,120487 ,120491 109 Cornwallite (*) None Cu5 (AsO4 )2 (OH)4 3 120474 ,120487 ,120491 175 Cotunnite (*) None PbCl2 270 270 1 120373 54 Covellite (*) Covellite CuS 252 176 3 120171 ,120240 ,120399 4165 Cuprite (*) Not in a structural group Cu2 O 252 176 8 120171 ,120240 ,120259 ,120474 ,120496 ,120503 ,120582 ,120595 2970 Cyanotrichite (*) Cyanotrichite Cu4 Al2 (SO4 )(OH)12 (H2 O)2 1 120496 179 Danburite (*) Danburite CaB2 Si2 O8 308 284 2 120559 ,120560 148 Datolite (*) Gadolinite CaB(SiO4 )(OH) 308 249 4 120328 ,120558 ,120559 ,120560 498 Devilline (*) Devilline CaCu4 (SO4 )2 (OH)6 ·3H2 O 1 120541 366 Dickite (*) Clay Kaolinite Al2 Si2 O5 (OH)4 270 270 1 120373 651 Digenite (*) Digenite Cu1.8 S 252 176 3 120171 ,120179 ,120240 1027 Diopside (*) Pyroxene CaMgSi2 O6 308 249 3 120558 ,120560 ,120582 4135 Djurleite (*) None Cu31 S16 252 176 1 120171 300 Dolomite (*) None CaMg(CO3 )2 270 176 24 120171 ,120208 ,120223 ,120226 ,120228 ,120230 ,120231 ,120232 ,120237 ,120238 ,120286 ,120304 ,120305 ,120330 ,120373 ,120377 ,120379 ,120384 ,120385 ,120394 ,120400 ,120402 ,120439 ,120567 9895 Domeykite (*) Domeykite Cu3 As 252 176 1 120171 73 Dumortierite (*) Dumortierite AlAl6 BSi3 O18 1 120585 231 Elbaite (*) Tourmaline Na(Al1.5 Li1.5 )Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH) 281 249 1 120558 520 Emplectite (*) Chalcostibite CuBiS2 1 120567 246 Epidote (*) Epidote Clinozoisite Ca2 (Al2 Fe3+ )[Si2 O7 ][SiO4 ]O(OH) 308 249 2 120558 ,120559 8173 Erythrite (*) Vivianite Co3 (AsO4 )2 ·8H2 O 750 42 7 120170 ,120171 ,120360 ,120361 ,120362 ,120567 ,120574 814 Eucairite (*) None CuAgSe 270 270 1 120373 54 Ferberite (*) Columbite Fe2+ (WO4 ) 2 120251 ,120498 551 Ferro-actinolite (*) Amphibole Ca2 (Mg2.5-0.0 Fe2+ 2.5-5.0 )Si8 O22 (OH)2 308 284 1 120560 129 Fersmite (*) Columbite CaNb2 O6 281 249 1 120558 83 Fischesserite (*) None Ag3 AuSe2 270 270 1 120373 24 Fluorapatite (*) Apatite Ca5 (PO4 )3 F 308 249 19 120438 ,120475 ,120482 ,120484 ,120486 ,120490 ,120492 ,120496 ,120497 ,120498 ,120500 ,120501 ,120502 ,120503 ,120512 ,120540 ,120558 ,120560 ,120574 2740 Fluorite (*) Fluorite CaF2 308 249 26 120272 ,120358 ,120361 ,120362 ,120404 ,120405 ,120409 ,120411 ,120412 ,120413 ,120419 ,120422 ,120439 ,120459 ,120475 ,120487 ,120490 ,120491 ,120497 ,120512 ,120558 ,120560 ,120567 ,120589 ,120595 ,120604 9617 Galena (*) Rocksalt PbS 750 42 43 120167 ,120171 ,120183 ,120188 ,120194 ,120208 ,120210 ,120211 ,120222 ,120276 ,120308 ,120310 ,120330 ,120360 ,120404 ,120405 ,120409 ,120411 ,120412 ,120413 ,120419 ,120429 ,120430 ,120431 ,120437 ,120480 ,120497 ,120521 ,120525 ,120530 ,120531 ,120532 ,120535 ,120540 ,120541 ,120542 ,120550 ,120560 ,120567 ,120579 ,120584 ,120588 ,120589 24243 Gibbsite (*) None Al(OH)3 308 284 1 120560 504 Goethite (*) Diaspore FeO(OH) 293 176 27 120170 ,120171 ,120173 ,120177 ,120219 ,120226 ,120227 ,120230 ,120231 ,120234 ,120235 ,120236 ,120238 ,120240 ,120251 ,120286 ,120310 ,120330 ,120373 ,120377 ,120379 ,120385 ,120409 ,120498 ,120540 ,120582 ,120604 7437 Gold (*) Copper Au 293 176 8 120171 ,120239 ,120240 ,120268 ,120306 ,120373 ,120553 ,120604 30554 Goslarite (*) Epsomite Zn(SO4 )·7H2 O 1 120298 188 Grossular (*) Garnet Ca3 Al2 (SiO4 )3 308 249 4 120399 ,120558 ,120559 ,120560 1544 Gypsum (*) Gypsum Ca(SO4 )·2H2 O 252 176 14 120167 ,120171 ,120175 ,120177 ,120178 ,120179 ,120183 ,120330 ,120439 ,120490 ,120498 ,120540 ,120541 ,120582 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 Hedenbergite (*) Pyroxene CaFe2+ Si2 O6 308 249 2 120558 ,120559 741 Hematite (*) Corundum Fe2 O3 295 176 60 120171 ,120177 ,120184 ,120189 ,120195 ,120201 ,120205 ,120206 ,120213 ,120215 ,120217 ,120219 ,120223 ,120226 ,120227 ,120228 ,120229 ,120230 ,120231 ,120234 ,120237 ,120238 ,120240 ,120241 ,120251 ,120270 ,120286 ,120292 ,120293 ,120294 ,120295 ,120300 ,120303 ,120304 ,120306 ,120317 ,120320 ,120321 ,120324 ,120325 ,120331 ,120336 ,120338 ,120340 ,120347 ,120349 ,120350 ,120352 ,120362 ,120371 ,120373 ,120377 ,120379 ,120381 ,120385 ,120386 ,120490 ,120539 ,120561 ,120567 14640 Hemimorphite (*) Not in a structural group Zn4 (Si2 O7 )(OH)2 ·H2 O 1 120494 1689 Herderite (*) Gadolinite CaBe(PO4 )F 281 249 1 120558 20 Huemulite (*) Pascoite Na4 MgV5+ 10 O28 ·24H2 O 252 176 1 120171 16 Hydrokenoelsmoreite (*) Pyrochlore 2 W2 O6 (H2 O)1 120251 57 Hydrozincite (*) None Zn5 (CO3 )2 (OH)6 2 120330 ,120409 1066 Ikunolite (*) Tetradymite Bi4 S3 1 120567 54 Ilmenite (*) Corundum Fe2+ Ti4+ O3 252 176 2 120171 ,120567 5433 Isomertieite (*) Isomertieite Pd11 Sb2 As2 270 270 1 120373 48 Jamesonite (*) None Pb4 FeSb6 S14 2 120276 ,120525 784 Jarosite (*) Alunite KFe3+ 3 (SO4 )2 (OH)6 4 120223 ,120377 ,120384 ,120541 2228 Johannsenite (*) Pyroxene CaMnSi2 O6 298 266 1 120328 73 Kaolinite (*) Clay Kaolinite Al2 Si2 O5 (OH)4 252 176 3 120171 ,120251 ,120273 5591 Klockmannite (*) Covellite Cu5.2 Se6 270 270 1 120373 63 Langisite (*) Nickeline CoAs 252 176 1 120171 4 Langite (*) None Cu4 (SO4 )(OH)6 ·2H2 O 10 120223 ,120227 ,120231 ,120238 ,120240 ,120381 ,120385 ,120474 ,120476 ,120541 593 Laumontite (*) Not in a structural group CaAl2 Si4 O12 ·4H2 O 308 249 2 120558 ,120560 1271 Lavendulan (*) None NaCaCu5 (AsO4 )4 Cl·5H2 O 252 176 2 120171 ,120230 149 Lead (*) Copper Pb 270 270 1 120373 192 Lepidocrocite (*) Lepidocrocite Fe3+ O(OH) 4 120223 ,120251 ,120381 ,120385 581 Libethenite (*) Andalusite Cu2 (PO4 )(OH) 2 120240 ,120474 234 Linarite (*) Linarite CuPb(SO4 )(OH)2 260 260 5 120308 ,120310 ,120409 ,120541 ,120567 987 Löllingite (*) Löllingite FeAs2 308 249 9 120399 ,120400 ,120439 ,120474 ,120540 ,120558 ,120559 ,120560 ,120567 762 Magnetite (*) Spinel Fe2+ Fe3+ 2 O4 298 266 2 120306 ,120328 14899 Malachite (*) Malachite Cu2 (CO3 )(OH)2 270 176 33 120171 ,120179 ,120209 ,120213 ,120223 ,120226 ,120227 ,120228 ,120230 ,120231 ,120237 ,120238 ,120240 ,120241 ,120251 ,120286 ,120358 ,120362 ,120373 ,120377 ,120381 ,120383 ,120385 ,120386 ,120394 ,120399 ,120422 ,120432 ,120480 ,120496 ,120541 ,120567 ,120582 12537 Malayaite (*) Titanite CaSnO(SiO4 ) 308 249 2 120558 ,120559 40 Manganite (*) Rutile Mn3+ O(OH) 3 120184 ,120238 ,120525 770 Manganosite (*) Rocksalt MnO 1 120315 73 Marcasite (*) Marcasite FeS2 3 120385 ,120410 ,120540 5674 Marialite (*) Scapolite Na4 Al3 Si9 O24 Cl 281 249 1 120558 139 Maucherite (*) None Ni11 As8 252 176 1 120171 161 Melanterite (*) Melanterite Fe(SO4 )·7H2 O 308 284 3 120223 ,120384 ,120559 915 Meneghinite (*) Meneghinite Pb13 CuSb7 S24 1 120276 158 Mertieite-II (*) Stillwaterite Pd8 Sb2.5 As0.5 270 270 1 120373 44 Meta-autunite (*) Meta-autunite Ca(UO2 )2 (PO4 )2 ·6H2 O 281 279 1 120459 388 Metatyuyamunite (*) Fritzscheite Ca(UO2 )2 (VO4 )2 ·3H2 O 252 176 1 120171 129 Microcline (*) Feldspar K(AlSi3 O8 ) 1 120567 4924 Millerite (*) Millerite NiS 2 120207 ,120220 1066 Mimetite (*) Apatite Pb5 (AsO4 )3 Cl 260 260 2 120310 ,120402 1107 Modderite (*) Modderite CoAs 252 176 1 120171 5 Molybdenite (*) Molybdenite MoS2 308 284 4 120251 ,120559 ,120560 ,120590 5800 Molybdomenite (*) None PbSe4+ O3 252 176 1 120171 15 Montebrasite (*) None LiAl(PO4 )(OH) 281 249 1 120558 200 Montmorillonite (*) Clay Smectite-vermiculite (Na,Ca)0.3 (Al,Mg)2 Si4 O10 (OH)2 ·nH2 O 308 249 2 120558 ,120560 1508 Montroseite (*) Diaspore (V3+ ,Fe2+ ,V4+ )O(OH) 252 176 1 120171 136 Muscovite (*) Mica Clay KAl2 (Si3 Al)O10 (OH)2 293 176 7 120171 ,120176 ,120251 ,120361 ,120373 ,120558 ,120604 17380 Nacrite (*) Clay Kaolinite Al2 Si2 O5 (OH)4 270 270 1 120373 112 Natrojarosite (*) Alunite NaFe3+ 3 (SO4 )2 (OH)6 1 120377 254 Naumannite (*) Not in a structural group Ag2 Se 270 270 1 120373 192 Nickeline (*) Nickeline NiAs 252 176 2 120171 ,120538 633 Nickelskutterudite (*) Skutterudite Perovskite (Ni,Co,Fe)As3 1 120302 176 Nontronite (*) Clay Smectite-vermiculite Na0.3 Fe3+ 2 (Si,Al)4 O10 (OH)2 ·nH2 O 252 176 1 120171 471 Olivenite (*) Andalusite Cu2 (AsO4 )(OH) 1 120474 492 Opal (*) Amorphous SiO2 ·n H2 O 6 120198 ,120273 ,120336 ,120399 ,120451 ,120461 2994 Orthoclase (*) Feldspar K(AlSi3 O8 ) 308 249 9 120186 ,120272 ,120322 ,120389 ,120558 ,120560 ,120563 ,120567 ,120604 2349 Palygorskite (*) Palygorskite Clay (Mg,Al)2 Si4 O10 (OH)·4H2 O 281 249 5 120167 ,120176 ,120177 ,120179 ,120558 306 Gersdorffite-Pa3 (*) Pyrite NiAsS 1 120567 767 Paramelaconite (*) None Cu1+ 2 Cu2+ 2 O3 252 176 1 120171 13 Paramontroseite (*) Ramsdellite VO2 252 176 1 120171 39 Pararammelsbergite (*) Löllingite NiAs2 252 176 1 120171 52 Parkerite (*) None Ni3 (Bi,Pb)2 S2 1 120567 55 Pascoite (*) Pascoite Ca3 V5+ 10 O28 ·17H2 O 252 176 1 120171 78 Penroseite (*) Pyrite (Ni,Co,Cu)Se2 270 270 1 120373 14 Petalite (*) Not in a structural group LiAlSi4 O10 281 249 1 120558 124 Pharmacosiderite (*) Pharmacosiderite KFe3+ 4 (AsO4 )3 (OH)4 ·6-7H2 O 2 120251 ,120498 428 Phurcalite (*) Phosphuranylite Ca2 (UO2 )3 O2 (PO4 )2 ·7H2 O 293 260 1 120604 20 Pollucite (*) Analcime Cs(Si2 Al)O6 ·nH2 O 281 249 1 120558 140 Posnjakite (*) None Cu4 (SO4 )(OH)6 ·H2 O 252 176 1 120171 309 Prehnite (*) Prehnite Ca2 Al(Si3 Al)O10 (OH)2 308 249 2 120558 ,120560 1898 Pseudomalachite (*) None Cu5 (PO4 )2 (OH)4 2 120240 ,120370 369 Pyrargyrite (*) None Ag3 SbS3 1 120540 1425 Pyrite (*) Pyrite FeS2 308 176 72 120167 ,120171 ,120175 ,120223 ,120237 ,120238 ,120244 ,120250 ,120251 ,120283 ,120297 ,120310 ,120315 ,120330 ,120362 ,120370 ,120373 ,120377 ,120381 ,120383 ,120385 ,120386 ,120394 ,120399 ,120404 ,120405 ,120409 ,120411 ,120412 ,120413 ,120422 ,120429 ,120432 ,120438 ,120439 ,120473 ,120474 ,120475 ,120480 ,120482 ,120483 ,120484 ,120488 ,120490 ,120493 ,120494 ,120495 ,120496 ,120499 ,120500 ,120501 ,120511 ,120512 ,120513 ,120520 ,120525 ,120531 ,120539 ,120540 ,120541 ,120550 ,120558 ,120559 ,120560 ,120562 ,120567 ,120578 ,120582 ,120588 ,120591 ,120595 ,120605 39462 Pyrochroite (*) Brucite Mn2+ (OH)2 1 120315 56 Pyrolusite (*) Rutile MnO2 252 176 17 120171 ,120184 ,120195 ,120203 ,120215 ,120217 ,120227 ,120230 ,120231 ,120238 ,120309 ,120385 ,120538 ,120544 ,120548 ,120550 ,120590 3106 Pyromorphite (*) Apatite Pb5 (PO4 )3 Cl 260 260 2 120310 ,120402 1725 Pyrrhotite (*) Nickeline Fe7 S8 308 176 7 120171 ,120402 ,120540 ,120558 ,120559 ,120560 ,120582 9056 Quartz (*) Quartz SiO2 750 42 121 120167 ,120168 ,120169 ,120171 ,120173 ,120175 ,120177 ,120179 ,120183 ,120184 ,120206 ,120208 ,120209 ,120210 ,120212 ,120213 ,120227 ,120230 ,120234 ,120235 ,120238 ,120240 ,120244 ,120245 ,120251 ,120252 ,120259 ,120261 ,120266 ,120267 ,120272 ,120273 ,120296 ,120299 ,120301 ,120310 ,120327 ,120328 ,120330 ,120335 ,120344 ,120347 ,120350 ,120353 ,120358 ,120360 ,120362 ,120367 ,120370 ,120373 ,120377 ,120379 ,120385 ,120389 ,120391 ,120399 ,120402 ,120404 ,120405 ,120409 ,120411 ,120412 ,120413 ,120419 ,120422 ,120429 ,120432 ,120437 ,120439 ,120440 ,120448 ,120449 ,120451 ,120453 ,120454 ,120456 ,120459 ,120460 ,120461 ,120477 ,120478 ,120479 ,120480 ,120487 ,120490 ,120492 ,120493 ,120496 ,120497 ,120498 ,120499 ,120500 ,120502 ,120503 ,120508 ,120512 ,120513 ,120525 ,120527 ,120531 ,120540 ,120541 ,120542 ,120550 ,120557 ,120558 ,120559 ,120560 ,120562 ,120563 ,120567 ,120574 ,120578 ,120582 ,120584 ,120588 ,120589 ,120590 ,120595 ,120602 ,120604 61156 Rammelsbergite (*) Löllingite NiAs2 750 42 2 120171 ,120360 233 Rauenthalite (*) None Ca3 (AsO4 )2 ·10H2 O 1 120400 23 Rauvite (*) None Ca(UO2 )2 V10 O28 ·16H2 O 252 176 1 120171 32 Rhodochrosite (*) Calcite Mn(CO3 ) 308 284 5 120315 ,120544 ,120548 ,120549 ,120560 1711 Rhodonite (*) Rhodonite CaMn3 Mn(Si5 O15 ) 308 284 6 120309 ,120538 ,120544 ,120550 ,120560 ,120590 969 Roscoelite (*) Mica KV3+ 2 (Si3 Al)O10 (OH)2 252 176 1 120171 253 Russellite (*) None Bi2 WO6 1 120251 40 Rutile (*) Rutile TiO2 1 120567 5614 Saléeite (*) None Mg(UO2 )2 (PO4 )2 (H2 O)10 281 279 1 120459 95 Sanidine (*) Feldspar K(AlSi3 O8 ) 252 176 1 120171 598 Scheelite (*) Scheelite Ca(WO4 ) 308 249 8 120474 ,120541 ,120542 ,120558 ,120559 ,120560 ,120567 ,120582 4894 Schorl (*) Tourmaline NaFe2+ 3 Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH) 284 176 9 120170 ,120171 ,120266 ,120273 ,120296 ,120299 ,120347 ,120454 ,120460 2705 Scorodite (*) None Fe3+ (AsO4 )·2H2 O 6 120251 ,120439 ,120473 ,120474 ,120497 ,120498 1153 Semseyite (*) None Pb9 Sb8 S21 1 120276 165 Serpierite (*) Devilline Ca(Cu,Zn)4 (SO4 )2 (OH)6 ·3H2 O 1 120541 292 Siderite (*) Calcite Fe(CO3 ) 308 249 58 120194 ,120208 ,120209 ,120210 ,120211 ,120212 ,120213 ,120221 ,120226 ,120227 ,120228 ,120230 ,120231 ,120232 ,120234 ,120236 ,120237 ,120238 ,120240 ,120244 ,120245 ,120250 ,120259 ,120276 ,120286 ,120296 ,120308 ,120310 ,120328 ,120358 ,120362 ,120377 ,120379 ,120383 ,120385 ,120386 ,120394 ,120399 ,120402 ,120405 ,120429 ,120439 ,120474 ,120482 ,120486 ,120490 ,120493 ,120497 ,120498 ,120500 ,120501 ,120503 ,120511 ,120540 ,120558 ,120560 ,120567 ,120605 6417 Sideronatrite (*) None Na2 Fe3+ (SO4 )2 (OH)·3H2 O 270 270 2 120170 ,120373 73 Silver (*) Copper Ag 252 176 6 120171 ,120180 ,120227 ,120535 ,120542 ,120574 5186 Skutterudite (*) Skutterudite Perovskite CoAs3 2 120574 531 Smithsonite (*) Calcite Zn(CO3 ) 1 120409 2473 Spessartine (*) Garnet Mn2+ 3 Al2 (SiO4 )3 308 284 1 120560 1214 Sphalerite (*) Sphalerite ZnS 308 260 28 120167 ,120209 ,120211 ,120212 ,120213 ,120222 ,120227 ,120310 ,120330 ,120358 ,120361 ,120362 ,120404 ,120405 ,120409 ,120411 ,120419 ,120422 ,120437 ,120487 ,120520 ,120525 ,120540 ,120559 ,120560 ,120567 ,120588 ,120591 21482 Stannite (*) Stannite Sphalerite Cu2 FeSnS4 1 120567 668 Stibiconite (*) Pyrochlore Sb3+ Sb5+ 2 O6 (OH) 281 249 1 120558 446 Stilbite-Ca (*) Stilbite NaCa4 (Si27 Al9 )O72 ·28H2 O 281 249 1 120558 268 Strontianite (*) Aragonite Sr(CO3 ) 2 120167 ,120183 589 Sulphur (*) Sulphur S 5 120251 ,120330 ,120405 ,120409 ,120540 2045 Synchysite-(Ce) (*) None CaCe(CO3 )2 F 1 120567 232 Talmessite (*) Fairfieldite Ca2 Mg(AsO4 )2 ·2H2 O 1 120400 46 Tantalite-(Mn) (*) Columbite Mn2+ Ta2 O6 281 249 1 120558 211 Tennantite-(Fe) (*) Tetrahedrite Cu6 (Cu4 Fe2 )As4 S13 1 120405 1803 Tenorite (*) None CuO 252 176 2 120171 ,120259 1101 Tephroite (*) Olivine Mn2+ 2 (SiO4 ) 308 284 2 120548 ,120560 240 Tetrahedrite-(Zn) (*) Tetrahedrite Cu6 (Cu4 Zn2 )Sb4 S13 260 260 6 120207 ,120209 ,120310 ,120405 ,120540 ,120567 5317 Tiemannite (*) Sphalerite HgSe 270 270 1 120373 83 Titanite (*) Titanite CaTi(SiO4 )O 308 284 2 120560 ,120567 4899 Topaz (*) Topaz Al2 SiO4 F2 281 249 3 120387 ,120389 ,120558 1476 Torbernite (*) None Cu(UO2 )2 (PO4 )2 ·12H2 O 293 260 3 120273 ,120459 ,120604 1059 Tremolite (*) Amphibole Ca2 (Mg5.0-4.5 Fe2+ 0.0-0.5 )Si8 O22 (OH)2 298 249 2 120328 ,120558 2562 Trona (*) None Na3 (HCO3 )(CO3 )·2H2 O 252 176 1 120171 129 Trüstedtite (*) Spinel Ni2+ Ni3+ 2 Se4 270 270 1 120373 4 Tyrolite (*) Tyrolite Ca2 Cu9 (AsO4 )4 (CO3 )(OH)8 ·11H2 O 1 120361 245 Tyrrellite (*) Spinel Cu(Co,Ni)2 Se4 270 270 1 120373 17 Tyuyamunite (*) None Ca(UO2 )2 (VO4 )2 ·5-8H2 O 252 176 1 120171 628 Ullmannite (*) Ullmannite NiSbS 1 120567 293 Umangite (*) None Cu3 Se2 270 270 1 120373 71 Uraninite (*) Fluorite UO2 750 42 6 120170 ,120171 ,120180 ,120360 ,120459 ,120604 2718 Uranophane-α (*) None Ca(UO2 )2 (SiO3 OH)2 ·5H2 O 293 260 2 120459 ,120604 890 Verbeekite (*) None PdSe2 270 270 1 120373 2 Vésigniéite (*) None Cu3 Ba(VO4 )2 (OH)2 252 176 1 120171 46 Vesuvianite (*) Vesuvianite (Ca,Na)19 (Al,Mg,Fe)13 (SiO4 )10 (Si2 O7 )4 (OH,F,O)10 308 284 2 120559 ,120560 1395 Vivianite (*) Vivianite Fe2+ 3 (PO4 )2 ·8H2 O 2 120177 ,120540 636 Volborthite (*) Volborthite Cu3 V2 O7 (OH)2 ·2H2 O 252 176 1 120171 155 Wavellite (*) Wavellite Al3 (PO4 )2 (OH)3 ·5H2 O 1 120198 374 Witherite (*) Aragonite Ba(CO3 ) 1 120567 251 Wollastonite (*) Wollastonite CaSiO3 308 249 3 120558 ,120559 ,120560 1247 Wroewolfeite (*) None Cu4 (SO4 )(OH)6 ·2H2 O 1 120541 95 Wurtzite (*) Wurtzite ZnS 2 120405 ,120409 372 Zircon (*) Zircon Zr(SiO4 ) 2 120567 ,120571 5251 Zoisite (*) Epidote Ca2 Al3 [Si2 O7 ][SiO4 ]O(OH) 281 249 1 120558 1025
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 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. 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 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 Lucy_041 269 269 269 Rb/Sr Period of greisenization and primary tin mineralisation. whole rock 1620 Devon, England, UK Dartmoor Granite Hawkes et al. (1978) US4_52 Edit Lucy_050 280 280 280 Age granite intruded 1620 Devon, England, UK Dartmoor Granite Alderton et al. (1992) 10.1016/0375-6742(92)90078-M JGE46_163 Edit Lucy_121 282 270 276 ± 6 K/Ar Previous K/Ar determination biotite 1620 Devon, England, UK Dartmoor Granite Bray and Spooner (1983) 10.1144/GSL.SP.1964.001.01.15 EG78_1064 Arithmetic mean of 13 biotite samples from Dartmoor Granite Edit Lucy_193 305 305 305 K-Ar Previous age stated, later recalculated by Lambert and Mills. biotite Oxford 20503 1620 Devon, England, UK Dartmoor Granite 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_267 293 277 285 ± 8 Rb-Sr The mean age of biotite from Dartmoor granite biotite 1620 Devon, England, UK Dartmoor Granite Darnley et al. (1965) MM34_159 Age stated to provide further evidence for the Uranite, Pitchblende and Pitchblende-Coffinite ages. Edit Lucy_268 270 260 265 ± 5 Rb-Sr The mean age of biotite from Dartmoor granite biotite 1620 Devon, England, UK Dartmoor Granite Darnley et al. (1965) MM34_159 Age stated to provide further evidence for the Uranite, Pitchblende and Pitchblende-Coffinite ages. Edit Emily000536 252 176 U-Pb mineralization 4422 Littleham Bay, Budleigh Salterton, East Devon, Devon, England, UK Littleham Mudstone Formation Milodowski A E et al. (2002) SKAB1_1 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). Edit MM54_485_001 270 270 270 1558 Hope's Nose, Torquay, Torbay, Devon, England, UK Hope's Nose Stanley et al. (1990) 10.1180/minmag.1990.054.376.13 MM54_485 No radiometric dates. Hosted in Devonian sequence, age may be "Variscan". This age (270 Ma) represents the earliest "main stage" polymetallic Cu-Sn-W mineralizations within the region Edit Lucy_049 281 279 280 ± 1 Rb-Sr Age granite intruded E 44796 295926 Foggintor Quarry, Princetown, Dartmoor Forest, West Devon, Devon, England, UK Foggintor Quarry Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Edit Bradley_2012_093 281 277 279±2 Rb-Sr 4572 Meldon Aplite Quarry, Okehampton Hamlets, West Devon, Devon, England, UK Meldon aplite McCauley and Bradley (2014) 10.3749/canmin.52.2.183 CM52_183 Edit Lucy_051 281 277 279 ± 2 Rb-Sr Preferred Age determined in study E 38443, E 38444, E 38445, E 38446, E 38447, E 384 4572 Meldon Aplite Quarry, Okehampton Hamlets, West Devon, Devon, England, UK Meldon Quarry Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Regression of the data yields an isochron age of 279 ± 2 Edit Lucy_052 265 255 260 ± 5 K-Ar Much younger mica age obtained, may be acounted for argon loss. lepidolite 4572 Meldon Aplite Quarry, Okehampton Hamlets, West Devon, Devon, England, UK Meldon Quarry Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Using K-Ar Age on lepidolite, it was concluded that the aplite was much younger than the granite Edit Lucy_214 259 249 254 ± 5 K-Ar Age for Dartmoor Granite muscovite Muscovite 4572 Meldon Aplite Quarry, Okehampton Hamlets, West Devon, Devon, England, UK Meldon Aplite Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 New ages on the granites and derived rocks Edit Lucy_096 308 284 296 ± 12 105601 Meldon Mine (Red-a-Ven Mine; Okehampton Wheal Maria; Devon Copper Mine), Okehampton Hamlets, West Devon, Devon, England, UK Meldon Fitch et al. (1964) 10.1144/GSL.SP.1964.001.01.16 GSL1_159 Age cited Edit Lucy_097 301 289 295 ± 6 105601 Meldon Mine (Red-a-Ven Mine; Okehampton Wheal Maria; Devon Copper Mine), Okehampton Hamlets, West Devon, Devon, England, UK Meldon Fitch et al. (1964) 10.1144/GSL.SP.1964.001.01.16 GSL1_159 Age cited Edit Lucy_082 295 295 295 K/Ar Age of cotact metamorphism 4571 Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UK Meldon Hawkes et al. (1978 US4_51 Age of contact metamorphism from intrusion of doloritic dyke and is equated to plutons in the area Edit Lucy_212 308 284 296 ± 12 K-Ar Locality unknown 4571 Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UK Railway Quarry (Meldon) Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 New ages for basic igneous rocks from south-west England. Edit Lucy_213 301 289 295 ± 6 K-Ar Locality unknown 4571 Meldon Quarry (British Rail Quarry; British Railways Quarry; B. R. Quarry), Okehampton Hamlets, West Devon, Devon, England, UK Meldon Miller et al (1964) 10.1002/gj.3350040109 GJ4_105 New ages for basic igneous rocks from south-west England. Edit Lucy_046 281 279 280 ± 1 Rb-Sr Age granite intruded E 38431, E38432, E 38433, E38435, E 38436 1521 Merrivale Quarry, Whitchurch, West Devon, Devon, England, UK Merrivale Quarry Darbyshire et al. (1985) 10.1144/gsjgs.142.6.1159 JGSL142_1159 Edit Lucy_199 270 260 265 ± 5 K-Ar Previous stated isotopic age biotite 1521 Merrivale Quarry, Whitchurch, West Devon, Devon, England, UK Merrivale Quarry 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_200 293 277 285 ± 8 Rb-Sr Previous stated isotopic age biotite 1521 Merrivale Quarry, Whitchurch, West Devon, Devon, England, UK Merrivale Quarry 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)
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