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| Manrique, Nelida; Samaniego, Pablo; Medard, Etienne; Schiavi, Federica; Marino, Jersy; Liorzou, Celine. |
| Magma recharge into a differentiated reservoir is one of the main triggering mechanisms for explosive eruptions. Here we describe the petrology of the eruptive products of the last explosive eruption of Tutupaca volcano (southern Peru) in order to constrain the pre-eruptive physical conditions (P-T-X-H2O) of the Tutupaca dacitic reservoir. We demonstrate that prior to the paroxysm, magma in the Tutupaca dacitic reservoir was at low temperature and high viscosity (735 +/- 23 degrees C), with a mineral assemblage of plagioclase, low-Al amphibole, biotite, titanite, and Fe-Ti oxides, located at 8.8 +/- 1.6 km depth (233 +/- 43 MPa). The phenocrysts of the Tutupaca dacites show frequent disequilibrium textures such as reverse zonation, resorption zones, and... |
| Tipo: Text |
Palavras-chave: Tutupaca; Magma recharge; Self-mixing; Thermobarometry. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00687/79870/82742.pdf |
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