Publication Date:
2017-04-04
Description:
The TOMO-ETNA experiment was devised for the investigation of the
continental and oceanic crust beneath Mt. Etna volcano and northeastern
Sicily up to the Aeolian Islands, through an active source study. In
this experiment, a large amount of geophysical data was collected both inland
and in the Ionian and Tyrrhenian Seas for identifying the major geological
and structural features offshore Mt. Etna and NE Sicily. One of
the oceanographic cruises organized within the TOMO-ETNA experiment
was carried out on the hydrographic vessel “Galatea” by Italian
Navy. During the cruise a detailed magnetic survey and a set of ROV (remotely
operated vehicle) dives were performed offshore Mt. Etna. The
magnetic survey allowed the compilation of a preliminary magnetic map
revealing a clear direct relationship between volcanic structures and high
frequency magnetic anomalies. Significant positive magnetic anomalies
were identified offshore the Timpa area and along the easternmost portion
of the Riposto Ridge and correlated to a primitive volcanic edifice and
to shallow volcanic bodies, respectively. On the whole, the magnetic
anomaly map highlights a clear SW-NE decreasing trend, where high
amplitude positive magnetic anomaly pattern of the SW sector passes,
northeastwardly, to a main negative one. ROV dives permitted to directly
explore the shallowest sectors of the Riposto Ridge and to collect several
videos and seafloor samples, allowing us to identify some locally developed
volcanic manifestations.
Description:
Published
Description:
S0431
Description:
1A. Geomagnetismo e Paleomagnetismo
Description:
JCR Journal
Description:
open
Keywords:
Magnetic survey
;
ROV dives
;
Mt. Etna offshore
;
TOMO-ETNA experiment
;
04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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