Table 1 Summary of 40Ar/39Ar data.
From: Rifting of the oceanic Azores Plateau with episodic volcanic activity
IGSN | Sample | Cruise | Separated phase | Rock type | Plateau age (ky) | ± 2σ | MSWD | 39Ar (%) | n steps | 40Ar/36Ar intercept ± 2σ | Inverse isochron age (ky) | ± 2σ | MSWD | K/Ca | ± 2σ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
IEAZO0903 | 738-ROV-02 | M128 | Groundmass | Lava | 2020 | ± 10 ± 0.5% | 0.79 | 100 | 31 | 286.95 ± 3.89 | 2040 | ± 20 ± 0.98% | 0.98 | 0.227 | ± 0.000 |
IEAZO1054 | 789-ROV-08 | M128 | Groundmass | Lava | 1957.9 | ± 7.7 ± 0.39% | 1.3 | 36 | 6 | 253.31 ± 93.54 | 1986.9 | ± 60.6 ± 3.05% | 1.42 | 0.230 | ± 0.000 |
Plagioclase | Lava | 1815.4 | ± 82.6 ± 4.55% | 0.93 | 87 | 17 | 305.01 ± 71.71 | 1777.2 | ± 251.6 ± 14.16% | 0.99 | 0.006 | ± 0.000 | |||
IEAZO1064 | 789-ROV-17 | M128 | Groundmass | Lava | 1656.7 | ± 4.1 ± 0.25% | 0.43 | 36 | 6 | 287.57 ± 52.45 | 1662.8 | ± 40.1 ± 2.41% | 0.53 | 0.473 | ± 0.001 |
Plagioclase | Lava | 1993.1 | ± 50.4 ± 2.53% | 1.88 | 83 | 18 | 284.26 ± 24.33 | 1975.2 | ± 99.8 ± 5.05% | 2.94 | 0.012 | ± 0.000 | |||
IEAZO1065 | 789-ROV-18 | M128 | Groundmass | Lava | 1558.8 | ± 4.5 ± 0.29% | 1.42 | 49 | 9 | 296.76 ± 6.76 | 1556.5 | ± 13 ± 0.84% | 1.71 | 0.372 | ± 0.001 |
