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. |
Brucite | Calcite | Clay | Clinozoisite | Copper | Corundum | Epidote | Feldspar | Fluorite | None |
Pyrite | Pyroxene | Quartz | Rocksalt | Serpentine | Spinel | Talc | Zircon |
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 |
---|---|---|---|---|---|---|---|
Albite (*) | Feldspar | Na(AlSi3O8) | 383.26 | 335.26 | 1 | 219349 | 8803 |
Antigorite (*) | Serpentine Clay | Mg3Si2O5(OH)4 | 369 | 246 | 1 | 219350 | 708 |
Augite (*) | Pyroxene | (Ca,Mg,Fe)2Si2O6 | 383.26 | 335.26 | 1 | 219349 | 2060 |
Brucite (*) | Brucite | Mg(OH)2 | 369 | 246 | 1 | 219350 | 462 |
Chrysotile (*) | Serpentine Clay | Mg3Si2O5(OH)4 | 369 | 246 | 1 | 219350 | 951 |
Epidote (*) | Epidote Clinozoisite | Ca2(Al2Fe3+)[Si2O7][SiO4]O(OH) | 383.26 | 246 | 0 | 8173 | |
Fluorite (*) | Fluorite | CaF2 | 369 | 246 | 1 | 219352 | 9617 |
Galena (*) | Rocksalt | PbS | 369 | 246 | 1 | 219352 | 24243 |
Gold (*) | Copper | Au | 383.26 | 246 | 0 | 30554 | |
Graphite (*) | None | C | 383.26 | 246 | 0 | 2812 | |
Hematite (*) | Corundum | Fe2O3 | 369 | 246 | 1 | 219352 | 14640 |
Magnesite (*) | Calcite | Mg(CO3) | 369 | 246 | 1 | 219350 | 1487 |
Magnetite (*) | Spinel | Fe2+Fe3+2O4 | 383.26 | 246 | 2 | 219349,219350 | 14899 |
Pyrite (*) | Pyrite | FeS2 | 383.26 | 246 | 2 | 219349,219352 | 39462 |
Quartz (*) | Quartz | SiO2 | 383.26 | 335.26 | 1 | 219349 | 61156 |
Siderite (*) | Calcite | Fe(CO3) | 383.26 | 246 | 0 | 6417 | |
Talc (*) | Clay Talc | Mg3Si4O10(OH)2 | 369 | 246 | 1 | 219350 | 3337 |
Zircon (*) | Zircon | Zr(SiO4) | 383.26 | 335.26 | 1 | 219349 | 5251 |
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 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alexandra-0417 | 262 | 246 | 254 ± 8 | K-Ar | Age of basalt | whole rock | 22345 | Lynnfield, Essex Co., Massachusetts, USA | Lynnfkld | Zartman et al. (1970) | 10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2 | GSAB81_3359 | |||||||||
Alexandra-0418 | 268 | 252 | 260 ± 8 | K-Ar | Age of granite | biotite | 22345 | Lynnfield, Essex Co., Massachusetts, USA | Lynnfkld | Zartman et al. (1970) | 10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2 | GSAB81_3359 | |||||||||
Alexandra-0419 | 369 | 349 | 359 ± 10 | K-Ar | Age of granite | hornblende | 22345 | Lynnfield, Essex Co., Massachusetts, USA | Lynnfkld | Zartman et al. (1970) | 10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2 | GSAB81_3359 | |||||||||
USGS-Rb-Sr-00947 | 383.26 | 335.26 | 359.26±24 | Rb-Sr | age of intrusion | whole rock | 33588 | Kallenberg Quarry (Robin Rock Quarry), Lynnfield, Essex Co., Massachusetts, USA | USGS-Rb-Sr | USGS-Rb-Sr |
Sample | Source Locality | Reference URL |
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