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13 results on '"Sorgo D."'

10. Hints on active tectonics in the southern Messina Straits: Preliminary results from the TAORMINA-2006 seismic cruise

Author

Argnani, A., Brancolini, G., Rovere, M., Accaino, F., Zgur, F., Grossi, M., Fanzutti, F., Visnovic, P., Sorgo, D., Lodolo, E., Bonazzi, C., and Neil Mitchell

Subjects
Taormina Fault, submarine slide, seismic survey, Messina
Abstract

The Straits of Messina and its surroundings are considered one of the most tectonically active areas of the Mediterranean; however, in spite of their hazard potential, modern geophysical data aimed at investigating the tectonic structures occurring in the marine areas are lacking. In order to bridge this gap, we carried out a multichannel seismic survey aimed at studying: i) the existence of the Taormina Fault, which many authors locate along the coast between Taormina and Messina; ii) the regional fault pattern in the area of the Messina 1908 earthquake; and iii) the instability offshore of Mt. Etna. Preliminary results show that the whole sector of the submarine slope located between Taormina and Messina has been tilted eastwards and that there is no Taormina Fault cutting the Quaternary sediments. On the other hand, the best-imaged active fault occurs on the Calabrian side of the Messina Straits. This NW-SE-trending fault is about 20 km long and dips westwards with a low-angle. Finally, a large submarine slide, longer than 10 km and thicker than 400 m, has been found offshore Mt. Etna.

13. Seismic tomography in Monte Sinni (Sardinia, Italy) coal mine.

Author

Rossi, G., Sardu, G., Del Negro, E., Sorgo, D., Nieto, D., and Podda, P.

Subjects
*CLEAN coal technologies, *COAL mining, *GEOPHYSICAL methods in soil surveys, *SEISMIC tomography, *SEISMIC wave velocity, *GEOPHYSICS, *PETROLOGY
Abstract

Thanks to new "clean coal technologies", there is a renewed interest in coal and its exploitation: hence, to better evaluate a region's potentiality, and the difficulties of coal extraction, it is important to define geometry, setting and thickness of the coal seams within the embedding rocks in detail. Geophysical methods, and in particular seismic tomography across the tunnels, may provide the requested information. This paper presents the results of a seismic tomographic survey done in 2006 in the Monte Sinni mine, SW Sardinia, Italy. The tomographic velocity field obtained is compared with the coal-lithologies thickness after coal extraction. We conclude that there is an inverse correlation between seismic velocity and amount of coal, which confirms the validity of the tomographic approach in such field, and encourages to further optimize the acquisition and analysis procedures to gain a greater understanding of the mineralized seam setting and of its lateral variations. [ABSTRACT FROM AUTHOR]

Published
2010

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