Publication Date:
2022-06-22
Description:
Silicic calderas are volcanic systems whose unrest evolution is more unpredictable than
other volcano types because they often do not culminate in an eruption. Their complex
structure strongly influences the post-collapse volcano-tectonic evolution, usually coupling
volcanism and ground deformation. Among such volcanoes, the Campi Flegrei caldera
(southern Italy) is one of the most studied. Significant long- and short-term ground
deformations characterize this restless volcano. Several studies performed on the marinecontinental
succession exposed in the central sector of the Campi Flegrei caldera provided a
reconstruction of ground deformation during the last 15 kyr. However, considering that over
one-third of the caldera is presently submerged beneath the Pozzuoli Gulf, a comprehensive
stratigraphic on-land-offshore framework is still lacking. This study aims at reconstructing
the offshore succession through analysis of high-resolution single and multichannel
reflection seismic profiles and correlates the resulting seismic stratigraphic framework with
the stratigraphy reconstructed on-land. Results provide new clues on the causative relations
between the intra-caldera marine and volcaniclastic sedimentation and the alternating phases
of marine transgressions and regressions originated by the interplay between ground
deformation and sea-level rise. The volcano-tectonic reconstruction, provided in this work,
connects the major caldera floor movements to the large Plinian eruptions of Pomici
Principali (12 ka) and Agnano Monte Spina (4.55 ka), with the onset of the first post-caldera
doming at ~10.5 ka. We emphasize that ground deformation is usually coupled with volcanic
activity, which shows a self-similar pattern, regardless of its scale. Thus, characterizing the
long-term deformation history becomes of particular interest and relevance for hazard
assessment and definition of future unrest scenarios.
Description:
Published
Description:
855-882
Description:
1V. Storia eruttiva
Description:
JCR Journal
Keywords:
offshore stratigraphy
;
seismic units
;
La Starza succession
;
volcanism,
;
04.08. Volcanology
;
04.04. Geology
;
04.07. Tectonophysics
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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