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RELATIONSHIPS BETWEEN THE ACTIVE STRUCTURAL LINEAMENTS OF THE CAMPI FLEGREI AREA (SOUTHERN ITALY) FROM MORPHOMETRIC ANALYSIS AND RECENT GROUND DEFORMATION
Author(s)
Type
Abstract
Language
English
Obiettivo Specifico
3.2. Tettonica attiva
Status
Published
Conference Name
Issued date
May 31, 2010
Conference Location
Puerto de la Cruz
Tenerife, Canary Islands, Spain
Tenerife, Canary Islands, Spain
Keywords
Abstract
The Campi Flegrei volcanic district formed within an extensional
tectonic regime that was active in the region
since the Plio-Quaternary times (Rosi & Sbrana, 1987).
The tectonic elements outcropping in the area are mainly
correlated with a circular geometry of deformation,
and could also have been inherited by the regional NWSE
and NE-SW normal faults; likely, such faults acted
as preferential magma rise conduits feeding the active
Campanian volcanoes. In this paper we apply a methodology
for identifying the structural lineaments from
morphometrical data analysis (Nappi et al. 2007) derived
by processing of a very high resolution DTM. The
criteria of lineament extraction is based on the identification
of linear topographic surface features, such as
valleys, ridges, breaks in slope, boundaries of elevated
areas aligned in a rectilinear or slightly curvilinear shape
and that distinctly differ from the patterns of adjacent
features (Jordan et al., 2005). We have identified significant
structural lineaments extracting the linear continuity
of the morphostructural features observed on the
DEM. Their spatial and statistical coherence has been
examined and the comparison with the structural lineaments
already known from literature has been carried
out. The results of the analysis have been correlated to
the spatial distribution of the recent seismicity (crises
of 1982-1984 and 2004-2006) as well as with the local
ground deformation measured through high precision
levelling surveys over the last 20 years, together with
the tiltmetric data continuously recorded over the last
10 years. The aim of this analysis is understanding the
relationships between the recent dynamics of the area
and its active structural lineaments.
tectonic regime that was active in the region
since the Plio-Quaternary times (Rosi & Sbrana, 1987).
The tectonic elements outcropping in the area are mainly
correlated with a circular geometry of deformation,
and could also have been inherited by the regional NWSE
and NE-SW normal faults; likely, such faults acted
as preferential magma rise conduits feeding the active
Campanian volcanoes. In this paper we apply a methodology
for identifying the structural lineaments from
morphometrical data analysis (Nappi et al. 2007) derived
by processing of a very high resolution DTM. The
criteria of lineament extraction is based on the identification
of linear topographic surface features, such as
valleys, ridges, breaks in slope, boundaries of elevated
areas aligned in a rectilinear or slightly curvilinear shape
and that distinctly differ from the patterns of adjacent
features (Jordan et al., 2005). We have identified significant
structural lineaments extracting the linear continuity
of the morphostructural features observed on the
DEM. Their spatial and statistical coherence has been
examined and the comparison with the structural lineaments
already known from literature has been carried
out. The results of the analysis have been correlated to
the spatial distribution of the recent seismicity (crises
of 1982-1984 and 2004-2006) as well as with the local
ground deformation measured through high precision
levelling surveys over the last 20 years, together with
the tiltmetric data continuously recorded over the last
10 years. The aim of this analysis is understanding the
relationships between the recent dynamics of the area
and its active structural lineaments.
References
Rosi &
Sbrana 1987, CNR; Nappi et al. 2007, Mem. Soc. Geogr.
It.; Mitasova & Hofierka 1993, Matem. Geol.
Sbrana 1987, CNR; Nappi et al. 2007, Mem. Soc. Geogr.
It.; Mitasova & Hofierka 1993, Matem. Geol.
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