Publication Date:
2017-04-04
Description:
The new geological map of Etna volcano at 1:50,000 scale represents
a significant progress in the geological studies of this volcano
over the last 30 years, coming after Waltershausen’s map published
around the mid of 19th century, the first geological map of a large
active volcano, and the ROMANO et alii (1979) map published about a
century later, both at 1:50,000 scale. Lithostratigraphy was used for
mapping volcanic units and then Unconformity Bounded Units were
applied to group lithostratigraphic units into synthems. In addition,
lithosomes were exploited to better represent the spatial localization
of different eruptive centres according to their morphology. On the
whole, we identified 27 lithostratigraphic units, grouped into 8 synthems,
and 9 volcanoes. In detail, effusive and explosive deposits
generated by each eruption of Mongibello and, partially, Ellittico
volcanoes were mapped as flow rank. This stratigraphic framework
represents the best synthesis of the geological evolution of Etna volcano
using the main unconformities recognized within its complex
volcanic succession. In addition, we constrain the Etna volcanic succession
and its lithostratigraphic units chronologically by radioisotope
age determinations. On the basis of the outlined synthemic
units, it was possible to divide Etna’s volcanic succession into 4
supersynthems, which correspond to 4 well-defined and spatially
localized phases. The detailed reconstruction of the past eruptive
activity allowed compiling the most accurate dataset in particular of
the Holocene eruptions of Etna volcano, which will enable significantly
improving the volcanic hazard assessment, together with
petrological interpretation of erupted magmas and geophysical modelling
of the volcano plumbing system.
Description:
Published
Description:
265-291
Description:
3.5. Geologia e storia dei vulcani ed evoluzione dei magmi
Description:
JCR Journal
Description:
reserved
Keywords:
Mount Etna, geological map, basaltic composite
;
04. Solid Earth::04.04. Geology::04.04.99. General or miscellaneous
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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