Gravimetric Map of Italy on a scale of 1:1,250,000
A new gravimetric map of Italy and the adjacent seas was
realized on a scale of 1:1,250,000 using land and sea data
extracted respectively from databases of the APAT (Environmental
Protection Agency - Land Defence Department) and of the OGS
(National Institute of Oceanography and Experimental Geophysics
– Department of Geophysics of the Lithosphere). All data was
referred to the IGSN71 (International Gravity Standardization Net)
and the normal gravity was calculated using the 1980 formula. Land
data was processed by calculating the Bouguer anomaly using a
density of 2.67 g/cm³. The topographical correction was
extended to a radius of 166,736 km from the station point. The
processing of sea data, most of which was acquired along navigation
lines, only consisted in calculating the free-air anomaly. A grid
was created by inserting gravimetric data at a regular interval of
1 Km. The resulting map consists in this grid’s outline with
a colour-shaded relief representation.
The map contains information on medium-scale gravity anomalies for
geophysical studies related to the deep geology and the tectonic
elements of the Italian terrain. It can be considered a useful tool
for identifying the main structural features and outlining the main
geological elements on a regional scale.
Special credits go to ENI S.p.A. - Exploration & Production
Division, for having enabled us to use their gravimetric data,
which are also in the APAT database, and B.R.G.M. CDG/MA for having
provided onshore gravimetric data on Corsica.
A new gravimetric map of Italy and the adjacent seas was
realized on a scale of 1:1,250,000 using land and sea data
extracted respectively from databases of the APAT (Environmental
Protection Agency - Land Defence Department) and of the OGS
(National Institute of Oceanography and Experimental Geophysics
– Department of Geophysics of the Lithosphere). All data was
referred to the IGSN71 (International Gravity Standardization Net)
and the normal gravity was calculated using the 1980 formula. Land
data was processed by calculating the Bouguer anomaly using a
density of 2.67 g/cm³. The topographical correction was
extended to a radius of 166,736 km from the station point. The
processing of sea data, most of which was acquired along navigation
lines, only consisted in calculating the free-air anomaly. A grid
was created by inserting gravimetric data at a regular interval of
1 Km. The resulting map consists in this grid’s outline with
a colour-shaded relief representation.