Detailed Bathymetric Mapping of the Eastern Offshore Slope of Lipari Island (Tyrrhenian Sea): Insight into the Dark Side of an Arc Volcano |
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| Authors: | Fabiano Gamberi Michael P Marani |
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| Institution: | (1) Istituto per la Geologia Marina di Bologna, Via Gobetti 101, Bologna, 40129, Italy |
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| Abstract: | A detailed multibeam coverage of the eastern offshore of Lipari Island(Aeolian arc) has permitted its subdivision into two sectors with differentmorphobathymetric features. In the northern one, numerous, large, previouslyundetected rhyolitic lava flows have been identified. In the southern one, aconical pyroclastic and epiclastic edifice built on top of afan-shaped lava field has been discovered. Since some of theseoffshore features have no analogues on land, their recognition has furnishednew information about the volcanic processes that built the eastern portionof Lipari Island. In particular, the finding of a huge volume of offshorerhyolitic lava flows, largely exceeding the amount of this kind of lavas onland, shows that the contribution of rhyolitic products in the building ofthe Lipari apparatus has been up to now underestimated. More generally, thecomparison between the land and the offshore units of Lipari volcanicapparatus indicates that a better investigation of the submarine portions ofvolcanic islands can reveal new, unforeseen aspects and greatly enhance ourknowledge about their evolution. |
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| Keywords: | Lipari Island arc volcanoes swath bathymetry rhyolitic lava flows submarine lava fields |
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