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- W1570668906 abstract "Periodic lava sampling was carried out at the active vents during the entire duration ofthe 28 December 2002 to 22 July 2003 effusive eruption. Major and trace element bulk rock analyses were performed at different laboratories, thereby acquiring four independent sets of analysis. Nd and Sr isotope ratios were obtained on whole rocks and groundmasses, together with micro-Sr isotope analyses on plagioclase and clinopyroxene by microdrilling technique. Crystal size distribution, mineral, and glassy matrix chemistry were analyzed on selected samples. The products show a fairly homogeneous composition, close to that of the crystal-rich scoria that erupted in the previous years. Slight variations of trace elements and isotope ratios between products that erupted before and after the 5 April paroxysm are likely accounted for by limited mixing between the fresh, volatile-rich magma that erupted during the paroxysm and the volatile-poor magma feeding the lava flow. Micro-Sr isotope data show large isotopic disequilibria pointing to the persistence of highly Sr-radiogenic xenocrysts or crystal cores in the shallow magmatic system, probably recycled from the previous activity. Data rule out important changes in the dynamics of the plumbing system shortly before the eruption. A discrete input of deep magma into the lower part of the shallow system some months before the eruption may be at the origin of the increase of the magmatostatic pressure in the conduits, leading to the effusive eruption. An alternative hypothesis considers a nearly steady-state feeding system undergoing gradual, long-term pressure increase in its upper part, eventually leading to periodic lava effusions." @default.
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- W1570668906 date "2013-03-19" @default.
- W1570668906 modified "2023-10-03" @default.
- W1570668906 title "Textural and Compositional Characteristics of Lavas Emitted During the December 2002 to July 2003 Stromboli Eruption (Italy): Inferences on Magma Dynamics" @default.
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- W1570668906 doi "https://doi.org/10.1029/182gm18" @default.
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