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@ARTICLE{Poli:904461,
author = {Poli, Maria Eliana and Falcucci, Emanuela and Gori, Stefano
and Monegato, Giovanni and Zanferrari, Adriano and Affatato,
Alessandro and Baradello, Luca and Böhm, Gualtiero and Bo,
Igor Dal and Del Pin, Enrico and Forte, Emanuele and Grimaz,
Stefano and Marchesini, Andrea},
title = {{P}aleoseismological evidence for historical ruptures along
the {M}eduno {T}hrust (eastern {S}outhern {A}lps, {NE}
{I}taly).},
journal = {Tectonophysics},
volume = {818},
issn = {0040-1951},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-06031},
pages = {229071 -},
year = {2021},
abstract = {We carried out new geological, morphotectonic, geophysical
and paleoseismological investigations on the Meduno Thrust
that belongs to the Pliocene-Quaternary front of the eastern
Southern Alps in Friuli (NE Italy). The study area is
located in the Carnic Prealps, where a series of alluvial
terraces, linked to both climatic and tectonic pulses
characterises the lower reach of the Meduna Valley. In
correspondence of the oblique ramp of the Meduno Thrust, the
Late Pleistocene Rivalunga terrace shows a set of scarps
perpendicular to the Meduno valley, often modified by human
activity. In order to reconstruct the tectonic setting of
the area and identify the location for digging
paleoseismological trenches, integrated geophysical
investigations including electrical resistivity tomography,
seismic refraction and reflection, ground penetrating radar
and surface wave analyses (HVSR, ReMi and MASW), were
carried out across the scarps of the Rivalunga terrace.
Geophysical surveys pinpointed that in correspondence of the
oblique ramp, stress is accommodated by a transpressive
thrust system involving all the seismo-stratigraphic
horizons apart from the ploughed soil. Trenching illustrated
the Meduno Thrust movements during Late
Pleistocene-Holocene. Trenches exhibited both shear planes
and extrados fracturing, showing deformed alluvial and
colluvial units. 14C datings of the colluvial units show
that the most recent fault movements occurred after 1360 CE
and 1670 CE. The age of the deformed stratigraphic units
compared with the earthquakes listed in current catalogues,
suggests that the 1776 earthquake (Mw 5.8, Io = 8–9 MCS)
could represent the last seismic event linked to the Meduno
thrust activity. This study provided new quantitative
constraints improving seismic hazard assessment for Carnic
prealpine area.},
cin = {IBG-3},
ddc = {550},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {2173 - Agro-biogeosystems: controls, feedbacks and impact
(POF4-217)},
pid = {G:(DE-HGF)POF4-2173},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000703690400005},
doi = {10.1016/j.tecto.2021.229071},
url = {https://juser.fz-juelich.de/record/904461},
}