Physics
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pepi...53..255b&link_type=abstract
Physics of the Earth and Planetary Interiors, Volume 53, Issue 3-4, p. 255-260.
Physics
4
Scientific paper
A preliminary geomagnetic variation data analysis has been made in the Piedmont-Ligurian area in north-western Italy. Data were collected by means of two instruments: an Askania portable variograph and a LaCour fixed station operated in the Roburent geomagnetic observatory. The portable variograph has been moved to several locations in north-western Italy. Parkinson vectors were drawn for 8, 20 and 60 min respectively, considering bay-like events recorded at single stations. Fourier parameters and anomaly maps for 32 and 64 min have been obtained after selecting similar events in order to simulate a magnetometric array.
Results show trends that suggest possible correlations with three main geological features of the investigated area: (1) a coast effect probably also related to the lithospheric thickness of the Ligurian Sea; (2) a possible highly conductive channel connected to the Alpine system that could be analogous to anomalous structures found in Europe; and (3) an effect of the lower crust being obducted in the Ivrea body and subducted in the Southern Alps.
Bozzo Emanuele
Meloni Antonio
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