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.
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 502 502 2 13238 ,13241 2793 Actinolite (*) Amphibole Ca2 (Mg4.5-2.5 Fe2+ 0.5-2.5 )Si8 O22 (OH)2 2 13220 ,13250 3419 Albite (*) Feldspar Na(AlSi3 O8 ) 2 13220 ,13250 8803 Analcime (*) Analcime Na(AlSi2 O6 )·H2 O 3 13231 ,13232 ,13246 1627 Andradite (*) Garnet Ca3 Fe3+ 2 (SiO4 )3 419.2 358.9 2 13218 ,13250 1534 Anglesite (*) Baryte Pb(SO4 ) 1 13241 2734 Ankerite (*) None Ca(Fe2+ ,Mg)(CO3 )2 2 13220 ,13250 3092 Anorthite (*) Feldspar Ca(Al2 Si2 O8 ) 1 13231 1036 Anthophyllite (*) Amphibole Mg2 Mg5 Si8 O22 (OH)2 1 13230 718 Antigorite (*) Serpentine Clay Mg3 Si2 O5 (OH)4 419.2 358.9 1 13218 708 Aragonite (*) Aragonite Ca(CO3 ) 541 0.0117 4 13218 ,13232 ,13246 ,13250 3250 Arsenic (*) Arsenic As 1 13250 379 Arsenopyrite (*) Arsenopyrite FeAsS 502 502 6 13220 ,13238 ,13241 ,13243 ,13250 ,13252 9052 Augite (*) Pyroxene (Ca,Mg,Fe)2 Si2 O6 2 13231 ,13250 2060 Awaruite (*) Auricupride Perovskite Ni3 Fe 419.2 358.9 1 13218 166 Azurite (*) Not in a structural group Cu3 (CO3 )2 (OH)2 2 13223 ,13250 5509 Baryte (*) Baryte Ba(SO4 ) 502 502 2 13238 ,13250 11547 Bavenite (*) None Ca4 Be2+x Al2-x Si9 O26-x (OH)2+x (x = 0 to 1) 3 13220 ,13250 ,13252 255 Bertrandite (*) Not in a structural group Be4 Si2 O7 (OH)2 2 13220 ,13250 606 Beryl (*) Beryl Be3 Al2 Si6 O18 2 13250 ,13252 4286 Beudantite (*) Alunite PbFe3+ 3 (AsO4 )(SO4 )(OH)6 1 13250 413 Bismite (*) None Bi2 O3 1 13243 214 Bismuth (*) Arsenic Bi 3 13220 ,13243 ,13250 1966 Bismuthinite (*) Stibnite Bi2 S3 3 13220 ,13243 ,13250 1935 Bismutite (*) Bismutite Bi2 O2 (CO3 ) 1 13243 716 Bornite (*) None Cu5 FeS4 1 13223 5516 Boulangerite (*) None Pb5 Sb4 S11 502 502 5 13238 ,13241 ,13248 ,13250 ,13251 843 Bournonite (*) Bournonite CuPbSbS3 502 502 3 13238 ,13248 ,13251 1089 Brucite (*) Brucite Mg(OH)2 541 0.0117 3 13212 ,13218 ,13250 462 Calcite (*) Calcite Ca(CO3 ) 7 13211 ,13220 ,13227 ,13232 ,13237 ,13246 ,13250 27770 Cassiterite (*) Rutile SnO2 4 13220 ,13249 ,13250 ,13253 5171 Cerussite (*) Aragonite Pb(CO3 ) 3 13217 ,13224 ,13241 4979 Chalcanthite (*) Chalcanthite Cu(SO4 )·5H2 O 1 13250 925 Chalcocite (*) None Cu2 S 2 13220 ,13250 5707 Chalcophanite (*) None ZnMn4+ 3 O7 ·3H2 O 1 13241 197 Chalcopyrite (*) Chalcopyrite CuFeS2 502 502 6 13220 ,13223 ,13238 ,13243 ,13250 ,13252 27198 Chlorargyrite (*) Rocksalt AgCl 2 13220 ,13241 1382 Chondrodite (*) Humite Mg5 (SiO4 )2 F2 1 13250 285 Chromite (*) Spinel Fe2+ Cr2 O4 5 13213 ,13214 ,13215 ,13241 ,13250 3902 Chrysotile (*) Serpentine Clay Mg3 Si2 O5 (OH)4 419.2 358.9 3 13212 ,13218 ,13250 951 Clinochlore (*) Chlorite Clay Mg5 Al(AlSi3 O10 )(OH)8 541 0.0117 2 13218 ,13250 1756 Clinohumite (*) Humite Mg9 (SiO4 )4 F2 1 13250 236 Coalingite (*) Hydrotalcite Mg10 Fe3+ 2 (CO3 )(OH)24 ·2H2 O 541 0.0117 1 13212 27 Cobaltpentlandite (*) Pentlandite Co9 S8 541 0.0117 1 13218 82 Copiapite (*) Copiapite Fe2+ Fe3+ 4 (SO4 )6 (OH)2 ·20H2 O 1 13250 382 Copper (*) Copper Cu 1 13250 3846 Cordierite (*) Beryl Mg2 Al4 Si5 O18 1 13220 1008 Corundum (*) Corundum Al2 O3 4 13207 ,13208 ,13213 ,13250 1797 Covellite (*) Covellite CuS 541 0.0117 3 13218 ,13220 ,13223 4165 Crocoite (*) Monazite Baryte Pb(CrO4 ) 4 13217 ,13220 ,13224 ,13241 81 Cummingtonite (*) Amphibole Mg2 Mg5 Si8 O22 (OH)2 1 13230 327 Cuprite (*) Not in a structural group Cu2 O 1 13250 2970 Danalite (*) Cancrinite-sodalite Sodalite Be3 Fe2+ 4 (SiO4 )3 S 2 13220 ,13243 58 Diaspore (*) Diaspore AlO(OH) 1 13250 481 Dickite (*) Clay Kaolinite Al2 Si2 O5 (OH)4 2 13220 ,13250 651 Digenite (*) Digenite Cu1.8 S 541 0.0117 1 13218 1027 Diopside (*) Pyroxene CaMgSi2 O6 541 0.0117 2 13218 ,13227 4135 Dolomite (*) None CaMg(CO3 )2 502 502 6 13217 ,13220 ,13222 ,13238 ,13241 ,13250 9895 Dravite (*) Tourmaline NaMg3 Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH) 1 13250 648 Dypingite (*) None Mg5 (CO3 )4 (OH)2 ·5H2 O 2.58 0.0117 1 13218 50 Enstatite (*) Pyroxene Mg2 Si2 O6 541 0.0117 3 13218 ,13227 ,13250 944 Epidote (*) Epidote Clinozoisite Ca2 (Al2 Fe3+ )[Si2 O7 ][SiO4 ]O(OH) 502 502 2 13238 ,13250 8173 Falcondoite (*) Sepiolite Clay Ni4 Si6 O15 (OH)2 ·6H2 O 541 0.0117 1 13218 4 Ferberite (*) Columbite Fe2+ (WO4 ) 2 13220 ,13250 551 Ferrimolybdite (*) None Fe3+ 2 (Mo6+ O4 )3 ·7H2 O 1 13249 345 Ferroaluminoceladonite (*) Mica KFe2+ AlSi4 O10 (OH)2 1 13252 3 Fluoborite (*) None Mg3 (BO3 )F3 1 13250 52 Fluorapatite (*) Apatite Ca5 (PO4 )3 F 2 13249 ,13250 2740 Fluorite (*) Fluorite CaF2 4 13220 ,13243 ,13250 ,13252 9617 Fluornatrocoulsellite (*) Pyrochlore (Na1.5 Ca0.5 )(Mg1.5 Al0.5 )F6 F 1 13220 3 Foitite (*) Tourmaline (Fe2+ 2 Al)Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH)1 13250 75 Forsterite (*) Olivine Mg2 (SiO4 ) 2 13236 ,13250 1188 Franckeite (*) Cylindrite Pb21.7 Sn9.3 Fe4.0 Sb8.1 S56.9 2 13250 ,13252 52 Freibergite (*) Tetrahedrite Ag6 [Cu4 Fe2 ]Sb4 S12 502 502 1 13238 663 Gahnite (*) Spinel ZnAl2 O4 1 13250 445 Galena (*) Rocksalt PbS 502 502 6 13220 ,13222 ,13238 ,13241 ,13250 ,13252 24243 Gaspéite (*) Calcite Ni(CO3 ) 541 0.0117 1 13218 22 Gearksutite (*) None CaAlF4 (OH)·H2 O 1 13220 68 Gedrite (*) Amphibole Mg2 (Mg3 Al2 )(Si6 Al2 )O22 (OH)2 1 13230 178 Goethite (*) Diaspore FeO(OH) 1 13250 7437 Gold (*) Copper Au 502 502 5 13215 ,13236 ,13238 ,13243 ,13250 30554 Gonnardite (*) Natrolite (Na,Ca)2 (Si,Al)5 O10 ·3H2 O 1 13232 167 Goslarite (*) Epsomite Zn(SO4 )·7H2 O 1 13250 188 Graphite (*) None C 2 13220 ,13250 2812 Greenockite (*) Wurtzite CdS 1 13241 717 Grossular (*) Garnet Ca3 Al2 (SiO4 )3 1 13230 1544 Grunerite (*) Amphibole Fe2+ 2 Fe2+ 5 Si8 O22 (OH)2 1 13220 223 Gypsum (*) Gypsum Ca(SO4 )·2H2 O 3 13220 ,13241 ,13250 6890 Gyrolite (*) Gyrolite NaCa16 (Si23 Al)O60 (OH)8 ·14H2 O 1 13227 142 Halite (*) Rocksalt NaCl 1 13250 1398 Halotrichite (*) Halotrichite Fe2+ Al2 (SO4 )4 ·22H2 O 1 13250 409 Hambergite (*) None Be2 (BO3 )(OH) 1 13250 81 Hastingsite (*) Amphibole NaCa2 (Fe2+ 4 Fe3+ )(Si6 Al2 )O22 (OH)2 3 13220 ,13230 ,13243 209 Hawleyite (*) Sphalerite CdS 1 13241 62 Heazlewoodite (*) None Ni3 S2 419.2 358.9 1 13218 205 Hellyerite (*) None Ni(CO3 )·6H2 O 2.58 0.0117 1 13218 3 Hematite (*) Corundum Fe2 O3 2 13220 ,13250 14640 Hemimorphite (*) Not in a structural group Zn4 (Si2 O7 )(OH)2 ·H2 O 1 13250 1689 Hetaerolite (*) Spinel ZnMn3+ 2 O4 1 13241 73 Hisingerite (*) Kaolinite Clay Fe2 Si2 O5 (OH)4 ·2H2 O 1 13250 144 Hydrohonessite (*) Woodwardite Hydrotalcite (Ni1-x Fe3+ x )(SO4 )x/2 (OH)2 ·nH2 O (x < 0.5, n > 3x/2) 541 0.0117 1 13218 12 Hydrokenoralstonite (*) Pyrochlore 2 Al2 F6 (H2 O)1 13250 56 Ilmenite (*) Corundum Fe2+ Ti4+ O3 2 13220 ,13243 5433 Iridium (*) Copper Ir 3 13213 ,13214 ,13215 162 Isokite (*) Titanite CaMg(PO4 )F 1 13250 22 Jamesonite (*) None Pb4 FeSb6 S14 4 13248 ,13250 ,13251 ,13252 784 Kaolinite (*) Clay Kaolinite Al2 Si2 O5 (OH)4 1 13250 5591 Köttigite (*) Vivianite Zn3 (AsO4 )2 ·8H2 O 1 13241 60 Leadhillite (*) None Pb4 (SO4 )(CO3 )2 (OH)2 1 13216 265 Lepidocrocite (*) Lepidocrocite Fe3+ O(OH) 1 13241 581 Lizardite (*) Serpentine Clay Mg3 Si2 O5 (OH)4 541 0.0117 2 13212 ,13218 359 Luinaite-(OH) (*) Tourmaline (Na, )(Fe2+ ,Mg)3 Al6 (BO3 )3 Si6 O18 (OH)4 3 13220 ,13250 ,13252 9 Magnesio-hastingsite (*) Amphibole NaCa2 (Mg4 Fe3+ )(Si6 Al2 )O22 (OH)2 1 13243 80 Magnesiochromite (*) Spinel MgCr2 O4 3 13213 ,13214 ,13215 311 Magnesite (*) Calcite Mg(CO3 ) 485.4 382.7 3 13218 ,13250 ,13252 1487 Magnetite (*) Spinel Fe2+ Fe3+ 2 O4 485.4 382.7 4 13212 ,13218 ,13220 ,13250 14899 Malachite (*) Malachite Cu2 (CO3 )(OH)2 2 13223 ,13250 12537 Marcasite (*) Marcasite FeS2 2 13220 ,13250 5674 Massicot (*) None PbO 1 13241 202 Meionite (*) Scapolite Ca4 Al6 Si6 O24 (CO3 ) 1 13243 176 Melanterite (*) Melanterite Fe(SO4 )·7H2 O 1 13250 915 Microcline (*) Feldspar K(AlSi3 O8 ) 1 13250 4924 Millerite (*) Millerite NiS 541 0.0117 1 13218 1066 Mimetite (*) Apatite Pb5 (AsO4 )3 Cl 2 13217 ,13241 1107 Molybdenite (*) Molybdenite MoS2 541 0.0117 4 13218 ,13220 ,13249 ,13250 5800 Morinite (*) None NaCa2 Al2 (PO4 )2 (OH)F4 ·2H2 O 2 13220 ,13250 22 Muscovite (*) Mica Clay KAl2 (Si3 Al)O10 (OH)2 502 502 4 13220 ,13238 ,13241 ,13250 17380 Natrolite (*) Natrolite Na2 (Si3 Al2 )O10 ·2H2 O 5 13227 ,13231 ,13232 ,13233 ,13250 1236 Nepheline (*) Tridymite Na3 K(Al4 Si4 O16 ) 3 13207 ,13208 ,13231 884 Népouite (*) Serpentine Clay Ni3 Si2 O5 (OH)4 541 0.0117 1 13218 66 Nesquehonite (*) None Mg(CO3 )·3H2 O 541 0.0117 1 13212 80 Norbergite (*) Humite Mg3 (SiO4 )F2 1 13250 37 Nullaginite (*) Malachite Ni2 (CO3 )(OH)2 541 0.0117 1 13218 3 Olenite (*) Tourmaline NaAl3 Al6 (Si6 O18 )(BO3 )3 O3 (OH) 1 13250 24 Opal (*) Amorphous SiO2 ·n H2 O 1 13250 2994 Orthoclase (*) Feldspar K(AlSi3 O8 ) 2 13220 ,13250 2349 Osmium (*) None Os 2 13213 ,13215 169 Otwayite (*) None Ni2 (CO3 )(OH)2 ·H2 O 2.58 0.0117 1 13218 5 Palygorskite (*) Palygorskite Clay (Mg,Al)2 Si4 O10 (OH)·4H2 O 541 0.0117 2 13218 ,13250 306 Pecoraite (*) Clay Serpentine Ni3 Si2 O5 (OH)4 541 0.0117 1 13218 40 Pentlandite (*) Pentlandite (Ni,Fe)9 S8 541 0.0117 1 13218 1512 Phenakite (*) Phenakite Be2 (SiO4 ) 1 13250 326 Phlogopite (*) Mica Clay KMg3 (AlSi3 O10 )(OH)2 2 13243 ,13250 2273 Phosgenite (*) None Pb2 (CO3 )Cl2 1 13241 142 Polydymite (*) Spinel Ni2+ Ni3+ 2 S4 541 0.0117 1 13218 131 Prehnite (*) Prehnite Ca2 Al(Si3 Al)O10 (OH)2 1 13232 1898 Prosopite (*) None CaAl2 F4 (OH)4 1 13250 39 Proustite (*) None Ag3 AsS3 2 13241 ,13250 733 Pyrargyrite (*) None Ag3 SbS3 502 502 2 13238 ,13250 1425 Pyrite (*) Pyrite FeS2 541 0.0117 6 13211 ,13218 ,13220 ,13238 ,13250 ,13252 39462 Pyroaurite (*) Hydrotalcite Mg6 Fe3+ 2 (CO3 )(OH)16 ·4H2 O 541 0.0117 2 13212 ,13218 89 Pyrolusite (*) Rutile MnO2 1 13250 3106 Pyrophyllite (*) Clay Pyrophyllite Al2 Si4 O10 (OH)2 1 13250 771 Pyrostilpnite (*) Xanthoconite Ag3 SbS3 2 13221 ,13250 84 Pyrrhotite (*) Nickeline Fe7 S8 541 0.0117 4 13218 ,13220 ,13243 ,13250 9056 Quartz (*) Quartz SiO2 502 502 7 13220 ,13227 ,13235 ,13238 ,13241 ,13250 ,13252 61156 Reevesite (*) Hydrotalcite Ni6 Fe3+ 2 (CO3 )(OH)16 ·4H2 O 2.58 0.0117 1 13218 48 Retgersite (*) None Ni(SO4 )·6H2 O 541 0.0117 1 13218 55 Rhodochrosite (*) Calcite Mn(CO3 ) 1 13220 1711 Rutheniridosmine (*) None (Ir,Os,Ru) 1 13213 47 Rutile (*) Rutile TiO2 2 13220 ,13250 5614 Sanidine (*) Feldspar K(AlSi3 O8 ) 2 13208 ,13231 598 Saponite (*) Clay Smectite-vermiculite (Ca,Na)0.3 (Mg,Fe)3 (Si,Al)4 O10 (OH)2 ·4H2 O 541 0.0117 3 13211 ,13218 ,13232 301 Scheelite (*) Scheelite Ca(WO4 ) 2 13220 ,13243 4894 Schorl (*) Tourmaline NaFe2+ 3 Al6 (Si6 O18 )(BO3 )3 (OH)3 (OH) 2 13243 ,13250 2705 Scorodite (*) None Fe3+ (AsO4 )·2H2 O 1 13250 1153 Sellaite (*) Rutile MgF2 3 13220 ,13250 ,13252 46 Siderite (*) Calcite Fe(CO3 ) 5 13220 ,13222 ,13241 ,13246 ,13250 6417 Sillimanite (*) Not in a structural group Al2 SiO5 1 13250 1516 Silver (*) Copper Ag 1 13241 5186 Smithsonite (*) Calcite Zn(CO3 ) 1 13250 2473 Sodalite (*) Cancrinite-sodalite Sodalite Na4 (Si3 Al3 )O12 Cl 1 13208 444 Sphalerite (*) Sphalerite ZnS 502 502 7 13217 ,13220 ,13222 ,13238 ,13241 ,13250 ,13252 21482 Spinel (*) Spinel MgAl2 O4 3 13208 ,13227 ,13236 1934 Stannite (*) Stannite Sphalerite Cu2 FeSnS4 2 13220 ,13250 668 Stevensite (*) Clay (Ca,Na)x Mg3-y Si4 O10 (OH)2 541 0.0117 1 13218 57 Stibnite (*) Stibnite Sb2 S3 1 13250 3418 Sulphur (*) Sulphur S 1 13250 2045 Sylvite (*) Rocksalt KCl 1 13250 275 Symplesite (*) Symplesite Fe2+ 3 (AsO4 )2 ·8H2 O 1 13241 92 Tacharanite (*) None Ca12 Al2 Si18 O33 (OH)36 1 13227 47 Talc (*) Clay Talc Mg3 Si4 O10 (OH)2 485.4 382.7 3 13218 ,13220 ,13250 3337 Teallite (*) Arsenolamprite PbSnS2 1 13250 33 Tetrahedrite-(Zn) (*) Tetrahedrite Cu6 (Cu4 Zn2 )Sb4 S13 502 502 3 13220 ,13238 ,13250 5317 Tetrawickmanite (*) Perovskite Mn2+ Sn4+ (OH)6 1 13220 8 Theophrastite (*) Brucite Ni(OH)2 2.58 0.0117 1 13218 6 Thomsonite-Ca (*) Thomsonite NaCa2 (Al5 Si5 )O20 ·6H2 O 1 13232 452 Thorianite (*) Fluorite ThO2 1 13250 236 Titanite (*) Titanite CaTi(SiO4 )O 2 13243 ,13250 4899 Topaz (*) Topaz Al2 SiO4 F2 3 13220 ,13250 ,13252 1476 Tremolite (*) Amphibole Ca2 (Mg5.0-4.5 Fe2+ 0.0-0.5 )Si8 O22 (OH)2 1 13250 2562 Tungstite (*) Tungstite WO3 ·H2 O 1 13250 118 Vermiculite (*) Clay Smectite-vermiculite Mg0.7 (Mg,Fe,Al)6 (Si,Al)8 O20 (OH)4 ·8H2 O 1 13220 652 Vesuvianite (*) Vesuvianite (Ca,Na)19 (Al,Mg,Fe)13 (SiO4 )10 (Si2 O7 )4 (OH,F,O)10 1 13230 1395 Violarite (*) Spinel FeNi2 S4 541 0.0117 1 13218 380 Vivianite (*) Vivianite Fe2+ 3 (PO4 )2 ·8H2 O 3 13220 ,13250 ,13252 636 Vonsenite (*) Ludwigite Fe2+ 2 Fe3+ O2 (BO3 ) 1 13250 62 Wagnerite (*) Wagnerite Mg2 (PO4 )F 1 13250 61 Wavellite (*) Wavellite Al3 (PO4 )2 (OH)3 ·5H2 O 1 13250 374 Weberite (*) Weberite Na2 MgAlF7 1 13250 13 Wickmanite (*) Perovskite Mn2+ Sn4+ (OH)6 1 13220 24 Wollastonite (*) Wollastonite CaSiO3 2 13220 ,13250 1247 Xenotime-(Y) (*) Zircon Y(PO4 ) 2 13243 ,13250 939 Zaratite (*) Amorphous Ni3 (CO3 )(OH)4 ·4H2 O 2.58 0.0117 2 13218 ,13224 56 Zircon (*) Zircon Zr(SiO4 ) 3 13207 ,13208 ,13250 5251
Age ID Locality Notes Michelle_529 Lord Brassey Mine is known for unique nickel mineral assemblages. The Lord Brassey Mine can be divided into four unique stages of mineralization; magmatic, metamorphic, hydrothermal and supergene alteration. The magmatic stage formed minerals such as enstatite, forsterite, anorthite, augite, chromite. Little remains as this assemblage has largely been altered to form new minerals. Michelle_530 Lord Brassey Mine is known for unique nickel mineral assemblages. The Lord Brassey Mine can be divided into four unique stages of mineralization; magmatic, metamorphic, hydrothermal and supergene alteration. The metamorphic stage is either due to greenschist-facies burial or emplacement related metamorphism. The primary magmatic assemblage has largely transformed to serpentine, chlorite, amphibole, epidote, garnet, and minor prehnite, magnetite, talc, magnesite, opal and chalcedony. Michelle_531 Lord Brassey Mine is known for unique nickel mineral assemblages. The Lord Brassey Mine can be divided into four unique stages of mineralization; magmatic, metamorphic, hydrothermal and supergene alteration. Hydrothermal alteration occurs later in the Devonian, producing serpentinite and introducing nickel. It is thought that a Devonian granitic intrusion postdates the serpentinite, introducing calcium, talc magnesite veins and possibly molybdenite and veins of diopside. Michelle_532 Lord Brassey Mine is known for unique nickel mineral assemblages. The Lord Brassey Mine can be divided into four unique stages of mineralization; magmatic, metamorphic, hydrothermal and supergene alteration. Exposure by glaciation and the following rapid erosion allowed new supergene and alteration mineralization.
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 Michelle_529 541 485.4 Cambrian Stratigraphy Magmatic age Augite 5885 Lord Brassey Mine, Heazlewood District, Waratah-Wynyard Municipality, Tasmania, Australia Lord Brassey Mine Anderson et al. (2002) MR33_321 Age of primary mineralization of igneous host rocks. Little remains of this assemblage due to metamorphism. Edit Michelle_530 485.4 382.7 Pre-mid-Devonian, possibly Cambrian Stratigraphy Metamorphic age Epidote, Magnesite, Magnetite, Opal, Prehnite, Talc 5885 Lord Brassey Mine, Heazlewood District, Waratah-Wynyard Municipality, Tasmania, Australia Lord Brassey Mine Anderson et al. (2002) MR33_321 Age of metamorphism. Age described as "Pre-mid-Devonian, possibly Cambrian." The metamorphic stage is either due to greenschist-facies burial or emplacement related metamorphism. Edit Michelle_531 419.2 358.9 Devonian Stratigraphy Hydrothermal age Andradite, Antigorite, Awaruite, Chrysotile, Heazlewoodite 5885 Lord Brassey Mine, Heazlewood District, Waratah-Wynyard Municipality, Tasmania, Australia Lord Brassey Mine Anderson et al. (2002) MR33_321 Age of hydrothermal alteration. Age described as "latest stage of Devonian metamorphism." Hydrothermal alteration occurs later in the Devonian, producing serpentinite and introducing nickel. It is thought that a Devonian granitic intrusion postdates the serpentinite, introducing calcium, talc magnesite veins and possibly molybdenite and veins of diopside. Edit Michelle_532 2.58 0.0117 Pleistocene Stratigraphy Supergene and weathering age Dypingite, Hellyerite, Otwayite, Reevesite, Theophrastite, Zaratite 5885 Lord Brassey Mine, Heazlewood District, Waratah-Wynyard Municipality, Tasmania, Australia Lord Brassey Mine Anderson et al. (2002) MR33_321 Age of weathering and supergene alteration. Exposure by glaciation and the following rapid erosion allowed the supergene and alteration mineralization. Edit vms-00038 502 502 Cambrian S 19265 Hellyer-Que River Mines, Waratah District, Waratah-Wynyard Municipality, Tasmania, Australia Hellyer Moiser et al. (2009) USGSOFR2009_1034 Edit vms-00041 502 502 Cambrian S 19265 Hellyer-Que River Mines, Waratah District, Waratah-Wynyard Municipality, Tasmania, Australia Que River Moiser et al. (2009) USGSOFR2009_1034
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