Supervisors info:
Ανδρέας Μαγκανάς Καθηγητής (Επιβλέπων), Παναγιώτης Πομώνης Επίκ.Καθηγητής, Κων/νος Κυριακόπουλος Καθηγητής
Translated title:
Volcanological, petrological, geochemical, sociological and environmental comparative study of the explosions of Santorini volcano in the 20th century
Summary:
Santorini, the famous stratovolcano in the Aegean Sea, erupted three time
periods during the
20th century (1925-1928, 1939-1941, and 1950). Since then still remains dormant
although it
requires scientific, environmental and social observation from the global
community. This study
tried to combine and evaluate new and published volcanological, petrological,
geochemical,
environmental and sociological data of these three phases of Santorini’s
activity, which
practically restricted to the caldera center on the Nea Kameni. After field
work on the formed
dacite flows, pyroclastics and domes, representative rock samples and enclaves
were collected
and investigated intensively for their texture, mineralogy and chemical
composition by
polarizing light microscope, scanning electron microscope (SEM-EDS), XRD, Raman
spectroscopy and ICP-MS.
The very petrogenetic evaluation of the data obtained suggests slight but
significant changes in
the solid and aerial phases produced during the three explosion stages, which
can be attributed
to minor variations in the magmatic differentiation and magma chamber
physicochemical
conditions. These variations were also expressed by decrease of duration and
intensity of the
eruptions, as well as in their volume of ejection and lava’s. Probably, the
subsequent relatively
long dormant period of the volcano is also related to this tension of decrease.
The influence to
the public and the respond of the relevant public sector were estimated by
studying local and
regional press and state documents from the periods of volcanism, and personal
interviews
from old local islanders that directly or indirectly experienced the events, as
well as from
visitors.
With due caution we can say that the social impact of the eruptions, as well as
their
environmental consequences, which were obtained by air pollution software
modeling using
volcanological data, old photos and literature, seem to follow the same way of
reduction with
time as above.
Keywords:
Dacite Santorini Lavas , Petrogenesis of Santorini, Sociological investigation in Santorini, Environmental investigation in Santorini, Petrological and Geochemical investigation in Santorini
