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A shift in the Sr isotopic composition of the magmatic source triggering 2019 paroxysmal eruptions at Stromboli Volcano
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Authors
Christian J. Renggli 
,
Joachim Krause,
Felix Genske,
Sabine Gilbricht,
Alessandro Gattuso,
Mischa Böhnke,
Jasper Berndt,
Giovanni Giuffrida
Abstract
The persistent volcanic activity of Stromboli Volcano, Aeolian Islands, Italy, is interrupted by paroxysmal eruptions on a
decadal interval. In 2019, two strong paroxysms on July 3rd and August 28th, ended a more than a decade long period of
regular strombolian activity. During normal strombolian activity the volcano erupts highly porphyritic scoria and lava (HP)20
with a shoshonitic basalt composition. In paroxysmal eruptions the HP material is mingled with low porphyritic (LP)
pumices. Here, we provide new in-situ chemical measurements of the glass phases of LP and HP materials. We also provide
the first radiogenic isotope data on the bulk compositions of the LP and HP components erupted on July 3rd, 2019. These
data show a remarkable shift in the Sr isotope ratio of the LP reservoir to more radiogenic compositions, not observed since
the paroxysm in 1930.
DOI
https://doi.org/10.31223/X5TH69
Subjects
Earth Sciences, Geochemistry, Physical Sciences and Mathematics, Volcanology
Keywords
Stromboli, Radiogenic isotopes, Sr isotopes, paroxysmal eruption, MLA, Mineral Liberation Analysis
Dates
Published: 2023-10-05 00:37
Last Updated: 2023-10-05 07:37
License
CC-BY Attribution-NonCommercial 4.0 International
Additional Metadata
Data Availability (Reason not available):
The data is publicly available on the DIGIS Geochemical Data Repository: Renggli, Christian; Krause, JoachimGenske, Felix; Gilbricht, Sabine; Gattuso, Alessandro; Böhnke, Mischa; Berndt, Jasper; Giuffrida, Giovanni (2023) Radiogenic isotope compositions of eruption products from the 2019 paroxysmal eruptions at Stromboli Volcano. GFZ Data Services. https://doi.org/10.5880/digis.2023.007
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