Abstract
A recently calibrated geobarometer based on the solubility of the Ca-Tschermak (Ca-Ts) component in clinopyroxene coexisting with garnet is applied to three representative mantle pyroxenite xenoliths from Valle Guffari tuff-breccia deposits (Hyblean Plateau, south-eastern Sicily). Combination of the barometer with suitable geothermometers plot two samples (UL-d21 and UL-d47) close to garnet-spinel transition in the lherzolite field and the sample UL-c17 close to the transition spinel-garnet in the pyroxenite field.
| Original language | English |
|---|---|
| Pages (from-to) | 177-182 |
| Number of pages | 6 |
| Journal | GeoActa |
| Volume | 1 |
| Publication status | Published - 2001 |
| Externally published | Yes |
Keywords
- Grt-Cpx barometry
- Mantle xenoliths
- Pyroxenites
- Sicily