Abstract
Two types of gabbroic cumulates, which are distinguished on the basis of the occurrence or the lack of amphibole, are associated with the andesites of the Galunggung 1982-83 eruption. These cumulates grew at the top of the magma chamber and their amphibole is a result of destabilization reaction of olivine and clinopyroxene under important fluid pressure. Anhydrous fractional crystallization may have oversaturated the magma in volatiles at a rate faster than the hydration reaction at the chamber roof which led to an overpressure that triggered the eruption. There is an abridged English version. -English summary
| Translated title of the contribution | Role of amphibole in the gabbroic cumulates from the 1982-83 Galunggung eruption Indonesia |
|---|---|
| Original language | French |
| Pages (from-to) | 85-91 |
| Number of pages | 7 |
| Journal | Comptes Rendus - Academie des Sciences, Serie II |
| Volume | 312 |
| Issue number | 1 |
| Publication status | Published - 1991 |