%0 Journal Article %T Experimental simulation of bubble nucleation and magma ascent in basaltic systems : implications for Stromboli volcano. %+ Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) %+ Magma - UMR7327 %A Le Gall, Nolwenn %A Pichavant, Michel %< avec comité de lecture %@ 0003-004X %J The American Mineralogist %I Mineralogical Society of America %V 101 %P 1967-1985 %8 2016 %D 2016 %R 10.2138/am-2016-5639 %K Basalt %K Stromboli %K volatiles %K magma degassing %K magma ascent %K bubble nucleation %K fragmentation %Z Sciences of the Universe [physics] %Z Sciences of the Universe [physics]/Earth Sciences %Z Sciences of the Universe [physics]/Earth Sciences/VolcanologyJournal articles %X The ascent of H2O- and HO-CO2-bearing basaltic melts from the deeper to the shallower part of the Stromboli magmatic system and their vesiculation were simulated from decompression experiments. A well-studied “golden” pumice produced during an intermediate to a large-scale paroxysm was used as starting material. Volatile-bearing glasses were synthesized at an oxygen fugacity (fO2) ranging from NNO–1.4 to +0.9, 1200°C and 200 MPa. The resulting crystal and bubble-free glasses were then isothermally (1200°C) decompressed to final pressures Pf ranging between 200 and 25 MPa, at a linear ascent rate of 1.5 m/s (or 39 kPa/s) prior to be rapidly quenched. %G English %2 https://insu.hal.science/insu-01321433/document %2 https://insu.hal.science/insu-01321433/file/LeGall_2016.pdf %L insu-01321433 %U https://insu.hal.science/insu-01321433 %~ OBSPM %~ INSU %~ BRGM %~ CNRS %~ UNIV-ORLEANS %~ ISTO %~ OPENAIRE %~ OSUC %~ PSL %~ OBSPM-PSL %~ ANR