Evidence of two Holocene phreatomagmatic eruptions at Stromboli volcano (Aeolian Islands) from paleomagnetic data

Details Evidence of two Holocene phreatomagmatic eruptions at Stromboli volcano (Aeolian Islands) from paleomagnetic data Evidence of two Holocene phreatomagmatic eruptions at Stromboli volcano (Aeolian Islands) from paleomagnetic data

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3321316p&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 21, CiteID L21316

Mathematics

Logic

4

Geomagnetism And Paleomagnetism: Rock And Mineral Magnetism, Volcanology: Volcanoclastic Deposits, Volcanology: Eruption Mechanisms And Flow Emplacement

Scientific paper

We present detailed stratigraphic-sedimentological and paleomagnetic analyses of Holocene phreatomagmatic deposits at Stromboli volcano (Aeolian Islands, Italy). The investigated deposits belong to the Secche di Lazzaro succession (SDL) and to the Advanced Operations Center of the Department of Civil Defense (COA) succession, both lying on the Neostromboli lavas (ca. 13-5 ka). The two stratigraphic successions have similar stratigraphic position and show a phreatomagmatic origin, likely related to catastrophic magma-water interaction processes during sector collapse events. However the thermal remanent magnetization data of the lava lithics indicate that deposits of the SDL succession were emplaced at very low temperatures (less than 140°C), whereas the basal part of the COA deposit was emplaced at temperatures between 300-340°C. Paleomagnetic results indicate that the two investigated deposits may be related to two distinct eruptive events occurred during the Holocene. Recent phreatomagmatic activity at Stromboli apparently has occurred more frequently than previously believed. Consequently, we must reconsider the recurrence interval of this dangerous eruptive scenario for Stromboli.

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