Table T1. Pressure-temperature estimates for in situ material in Legs 149 and 173 basement cores.
|
Site
|
Mineral
|
Pressure
(GPa) |
Approximate
temperature
(°C) |
Remarks
|
Source
|
|---|---|---|---|---|---|
| 897 | Pyroxenite | 0.8-1.0 | 970 | End of high-temperature deformation | Cornen et al., 1999 |
| 730 | Subsolidus reequilibration | Cornen et al., 1999 | |||
| 900 | Green spinel in gabbro | <0.8 | Unknown | Cornen et al., 1999 | |
| 1067 | Hornblende | 0.6 | Unpublished data* | ||
| 1068 | Hornblende | 0.73 | Unpublished data* | ||
| 1068 | Spinel-amphibole-clinopyroxene | 0.4 | 600, 740 | Metagabbro clast | Unpublished data* |
| 1067 | Amphibole-plagioclase | 0.7 ± 0.1 | 670 ± 40 | Three-stage retrograde metamorphism to greenschist facies | Gardien et al., in press |
| 0.55 ± 0.1 | 550 ± 60 | ||||
| >0.22 | 200-400 |
Note: * = R. Rubenach, N. Froitzheim, P. Wallace, M. Fanning, and R. Wyzsoczanski.