Evolution of the eruptive activity at Stromboli (Aeolian Islands - Italy) during the last 4 millennia. A tephrostratigraphic investigation on the early-phase of Recent Stromboli Eruptive Epoch

IF 2.4 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Volcanology and Geothermal Research Pub Date : 2025-03-03 DOI:10.1016/j.jvolgeores.2025.108308

G. Re, Di Roberto Alessio, Del Carlo Paola, Pompilio Massimo

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引用次数: 0

Abstract

Stromboli is famous for its persistent explosive activity that has been studied from various perspectives over the last century. By contrast, there is controversial information about the volcanic history regarding the period between 6000 years ago and the onset of the present-day activity.

Here, we present a comprehensive tephrostratigraphic investigation of the pyroclastic sequences that predate the onset of the present-day activity. This study integrates field observations, sedimentological analyses and radiometric ¹⁴C dating, together with detailed textural, petrographic and geochemical characterisation of juvenile clasts. Specifically, we document two superimposed volcaniclastic sequences, Member A and Member B, consisting of sub-conformable pyroclastic beds of lapilli and ash, interspersed with massive epiclastic deposits. While these sequences exhibit similar lithological features, indicating comparable eruptive dynamics, they are distinguishable for glass composition and chronostratigraphic framework.

In particular, a major change in the glass composition of the magma occurred after 1780 years ago, with a shift from high-K calc-alkaline (HKCA) to shoshonitic (SHO) affinity, composition that still persists in the present-day. We recognise four distinct eruptive periods with HKCA composition within Member A and two eruptive periods with SHO composition within Member B, both predating the onset of the present-day activity. Also, within Member A, we observed the earliest coexistence and mingling of two end-members with different texture and composition. This suggests that the feeding system of Stromboli could have been very similar to the present-day since at least 3200 years ago. It likely comprises two distinct magma bodies at different depths containing magmas with different compositions and porphyritic characteristics that occasionally interact prior to eruptions.

Our findings contribute to a comprehensive reconstruction of Stromboli's volcanic history and hold practical significance for anticipating and mitigating potential future volcanic events.

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来源期刊

Journal of Volcanology and Geothermal Research 地学-地球科学综合

CiteScore

5.90

自引率

13.80%

发文量

183

审稿时长

19.7 weeks

期刊介绍： An international research journal with focus on volcanic and geothermal processes and their impact on the environment and society. Submission of papers covering the following aspects of volcanology and geothermal research are encouraged: (1) Geological aspects of volcanic systems: volcano stratigraphy, structure and tectonic influence; eruptive history; evolution of volcanic landforms; eruption style and progress; dispersal patterns of lava and ash; analysis of real-time eruption observations. (2) Geochemical and petrological aspects of volcanic rocks: magma genesis and evolution; crystallization; volatile compositions, solubility, and degassing; volcanic petrography and textural analysis. (3) Hydrology, geochemistry and measurement of volcanic and hydrothermal fluids: volcanic gas emissions; fumaroles and springs; crater lakes; hydrothermal mineralization. (4) Geophysical aspects of volcanic systems: physical properties of volcanic rocks and magmas; heat flow studies; volcano seismology, geodesy and remote sensing. (5) Computational modeling and experimental simulation of magmatic and hydrothermal processes: eruption dynamics; magma transport and storage; plume dynamics and ash dispersal; lava flow dynamics; hydrothermal fluid flow; thermodynamics of aqueous fluids and melts. (6) Volcano hazard and risk research: hazard zonation methodology, development of forecasting tools; assessment techniques for vulnerability and impact.