Table 1. Summary of 40Ar/39Ar data from lava flow sites.
Ages calculated relative to 1.1864 Ma Alder Creek sanidine standard (37). Decay constants are from (52). Atmospheric 40Ar/36Ar = 298.56 ± 0.31 (57). No. of expts, number of experiments performed on each sample. N, number of steps included from the total.
| Sample |
VGP lat. (°) |
No. of expts |
Total fusion | 40Ar/36Ari ± 2σ | Isochron | N | 39Ar % | MSWD | Plateau |
|
Age (ka) ± 2σ |
Age (ka) ± 2σ |
Age (ka) ± 2 σ |
|||||||
| Haleakala | |||||||||
| H-15-29 | 80.6 | 1 | 618 ± 19 | 300 ± 6 | 617 ± 66 | 10 of 11 | 95.5 | 0.87 | 627.0 ± 16.0 |
| H-15-28 | 84.2 | 2 | 734 ± 5 | 300 ± 4 | 715 ± 23 | 23 of 34 | 75.3 | 0.98 | 725.6 ± 5.2 |
| 86C529A/27B2 | 86.5 | 1 | 732 ± 8 | 300 ± 7 | 717 ± 66 | 14 of 16 | 88.7 | 0.44 | 727.9 ± 9.2 |
| 85M001A/27B | 86.5 | 2 | 744 ± 3 | 302 ± 5 | 740 ± 14 | 17 of 21 | 76.5 | 0.89 | 749.2 ± 3.5 |
| H-15-27A | −44.2 | 3 | 764 ± 5 | 299 ± 3 | 767 ± 19 | 40 of 51 | 88.1 | 0.50 | 771.0 ± 4.5 |
| H-15-27 | −47.9 | 4 | 752 ± 4 | 298 ± 3 | 781 ± 22 | 46 of 69 | 76.1 | 0.67 | 770.8 ± 4.2 |
| 84C436A/25A | −38.2 | 4 | 766 ± 3 | 298 ± 3 | 778 ± 25 | 59 of 77 | 79.4 | 0.86 | 773.9 ± 3.5 |
| H-15-24A | −16.7 | 1 | 754 ± 3 | 299 ± 6 | 776 ± 13 | 9 of 15 | 82.8 | 0.29 | 775.7 ± 4.3 |
| H-15-24 | 62.0 | 3 | 756 ± 7 | 297 ± 3 | 772 ± 25 | 33 of 58 | 77.2 | 0.92 | 773.4 ± 6.3 |
| H-15-21 | −67.5 | 6 | 753 ± 4 | 298 ± 3 | 775 ± 20 | 59 of 80 | 85.0 | 0.41 | 771.7 ± 3.6 |
| Quebrada Turbia, Chile | |||||||||
| QTW11-20 | 87.4 | 1 | 711 ± 8 | 295 ± 9 | 754 ± 31 | 9 of 14 | 77.8 | 0.93 | 740.4 ± 7.2 |
| QTW11-19 | 80.2 | 1 | 742 ± 19 | 297 ± 6 | 775 ± 96 | 6 of 9 | 84.1 | 0.91 | 758.0 ± 21.0 |
| QTW11-16 | −24.8 | 1 | 766 ± 5 | 299 ± 7 | 780 ± 19 | 10 of 16 | 78.4 | 0.63 | 781.7 ± 5.8 |
| QTW11-11 | −26.1 | 1 | 754 ± 6 | 299 ± 7 | 770 ± 28 | 11 of 17 | 78.9 | 0.43 | 781.4 ± 5.6 |
| QTW11-5 | −25.7 | 1 | 775 ± 4 | 299 ± 10 | 787 ± 24 | 10 of 16 | 83.6 | 1.60 | 786.3 ± 5.3 |
| QTW11-3 | −21.8 | 1 | 766 ± 7 | 296 ± 6 | 783 ± 28 | 11 of 18 | 78.4 | 0.79 | 785.0 ± 6.6 |
| QTW10-10 | −25.6 | 1 | 779 ± 4 | 296 ± 6 | 787 ± 13 | 10 of 12 | 91.5 | 0.77 | 782.0 ± 5.1 |
| QTW10-5 | −18.6 | 1 | 779 ± 2 | 297 ± 9 | 776 ± 17 | 8 of 21 | 56.7 | 1.13 | 784.2 ± 3.1 |
| QTW10-3 | −8.9 | 1 | 782 ± 3 | 296 ± 8 | 787 ± 7 | 12 of 14 | 95.8 | 0.85 | 785.3 ± 3.8 |
| Guadeloupe | |||||||||
| GA0207B | −61.0 | 1 | 713 ± 16 | 298 ± 6 | 784 ± 63 | 8 of 14 | 67.8 | 0.29 | 786.0 ± 15.0 |
| GA010B | −14.4 | 1 | 746 ± 8 | 298 ± 14 | 778 ± 42 | 8 of 13 | 80.1 | 0.64 | 786.3 ± 7.5 |
| GD0103B | −79.0 | 1 | 766 ± 7 | 299 ± 4 | 772 ± 16 | 9 of 15 | 64.9 | 0.83 | 783.5 ± 6.8 |
| Tahiti: Punaruu South | |||||||||
| TT | −34.0 | 1 | 743 ± 6 | 296 ± 10 | 778 ± 41 | 8 of 17 | 63.2 | 0.60 | 777.4 ± 6.1 |
| R1V | −33.1 | 2 | 768 ± 8 | 300 ± 4 | 766 ± 15 | 15 of 30 | 71.6 | 0.73 | 774.4 ± 5.4 |
| R1T | −41.9 | 1 | 741 ± 6 | 294 ± 8 | 791 ± 46 | 9 of 18 | 57.5 | 0.56 | 777.0 ± 6.9 |
| R1S | −73.5 | 1 | 755 ± 8 | 301 ± 7 | 772 ± 24 | 9 of 16 | 77.7 | 0.75 | 789.1 ± 6.2 |
| Tahiti: Punaruu North | |||||||||
| TM28 | 74.6 | 1 | 713 ± 9 | 299 ± 8 | 761 ± 40 | 8 of 13 | 63.0 | 0.41 | 772.6 ± 9.3 |
| TM30 | 81.5 | 1 | 734 ± 10 | 300 ± 4 | 765 ± 26 | 11 of 17 | 84.1 | 0.69 | 774.4 ± 8.7 |
| TM31 | 62.5 | 2 | 771 ± 5 | 297 ± 3 | 785 ± 13 | 17 of 29 | 78.1 | 0.65 | 791.1 ± 4.6 |
| TM32 | −71.9 | 2 | 745 ± 9 | 298 ± 5 | 789 ± 34 | 19 of 37 | 80.4 | 0.81 | 795.5 ± 6.7 |
| TM24 | −24.5 | 2 | 769 ± 4 | 296 ± 4 | 795 ± 13 | 18 of 29 | 79.3 | 1.07 | 792.4 ± 3.8 |
| TM23 | 46.6 | 1 | 775 ± 9 | 298 ± 3 | 788 ± 15 | 10 of 15 | 81.6 | 0.56 | 794.3 ± 7.1 |
| TM27 | 43.5 | 1 | 792 ± 7 | 294 ± 19 | 796 ± 26 | 7 of 12 | 67.9 | 0.49 | 801.1 ± 6.7 |
| TM20-5 | 61.3 | 2 | 772 ± 6 | 298 ± 3 | 785 ± 15 | 21 of 35 | 84.3 | 0.65 | 793.6 ± 4.6 |
| TM18 | 56.5 | 1 | 752 ± 8 | 297 ± 12 | 790 ± 44 | 6 of 14 | 62.1 | 0.47 | 794.4 ± 6.7 |
| TM13 | −70.0 | 1 | 689 ± 10 | 298 ± 8 | 821 ± 46 | 6 of 13 | 56.1 | 0.34 | 819.0 ± 13.0 |
| La Palma | |||||||||
| TN15 | 76.7 | 1 | 681 ± 13 | 299 ± 3 | 675 ± 36 | 20 of 22 | 94.1 | 0.47 | 687.0 ± 11.0 |
| TN16 | −5.4 | 2 | 765 ± 5 | 298 ± 1 | 766 ± 12 | 43 of 46 | 93.4 | 0.85 | 771.7 ± 4.3 |
| TN17 | −31.1 | 1 | 762 ± 9 | 299 ± 3 | 762 ± 29 | 15 of 19 | 92.3 | 0.76 | 774.3 ± 7.9 |
| TN20 | −31.6 | 2 | 739 ± 6 | 296 ± 6 | 785 ± 29 | 16 of 34 | 70.7 | 0.97 | 774.8 ± 5.3 |