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Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/5009

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Title: Microgravity vertical gradient measurement in the site of VIRGO interferometric antenna (Pisa plain, Italy)
Authors: Stefanelli, P.*
Carmisciano, C.*
Caratori Tontini, F.*
Cocchi, L.*
Beverini, N.*
Fidecaro, F.*
Embriaco, D.*
Keywords: Microgravity vertical gradient
near surface geology
gravity modeling
Issue Date: Oct-2008
Publisher: Editrice Compositori
Title of journal: Annals of Geophysics
Series/Report no.: 5-6 / 51 (2008)
Abstract: The site of the European Gravitational Observatory (EGO) located in the countryside near Pisa (Tuscany, Italy) was investigated by a microgravity vertical gradient (MVG) survey. The EGO site houses the VIRGO interferometric antenna for gravitational waves detection. The microgravity survey aims to highlight the gravity anomalies of high-frequency related to more superficial geological sources in order to obtain a detailed model of the lithologic setting of the VIRGO site, that will allow an estimate of the noise induced by seismic waves and by Newtonian interference. This paper presents the results of the gradiometric survey of 2006 in the area of the interferometric antenna. MVG measurements allow us to enhance the high frequency signal strongly associated with the shallow structures. The gradient gravity map shows a main negative pattern that seems related to the trending of the high density layer of gravel that was evidenced in geotechnical drillings executed along the orthogonal arms during the construction of the VIRGO complex. Calibrating the relationship between the vertical gradient and the depth of the gravel interface we have computed a model of gravity gradient for the whole VIRGO site, defining the 3D distribution of the top surface of this layer. This latter shows a NE-SW negative pattern that may represent a palaeo-bed alluvial of the Serchio from the Bientina River system.
URI: http://hdl.handle.net/2122/5009
Appears in Collections:Annals of Geophysics
Papers Published / Papers in press
04.02.02. Gravity methods

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  • AGER, C. A., and J. O. LIARD (1982): Vertical gravity gradient surveys: field results and interpretation in British Columbia, Canada, Geophysics, 47, 919-925. BARTOLE, R., L. TORELLI, G. MATTEI, D. PEIS and G. BRANCOLINI (1991): Assetto stratigrafico-strutturale del Tirreno Settentrionale: stato dell’arte, Studi Geologici Camerti, 1, 115-140 BUTLER, D. K. (1984): Microgravimetric and gravity gradient techniques for the detection of subsurface cavities, Geophysics, 49, 108496. CANTINI, P., G. TESTA, G. ZANCHETTA and R. CAVALLINI (2001): The Plio-Pleistocene evolution of extensional tectonics in northern Tuscany, as constrained by new gravimetric data from the Montecarlo Basin (lower Arno Valley, Italy), Tectonophysics, 330, 25-43 CARMIGNANI, L,. F.A. DECANDIA, P.L. FANTOZZI, A. LAZZARETTO, D. LOTTA and M. MECCHERI (1994): Tertiary extensional tectonics in Tuscany (northern Apennines Italy), Tectonophysics, 238, 295-315 CARON, B., ET AL. (VIRGO Collaboration) (1997): The Virgo interferometer, Class. Quantum Grav., 14, 1461-1469 FAJKLEWICZ, Z. (1976): Gravity vertical gradient measurements for the detection of small geologic and anthropogenic forms, Geophysics, 41, 101630. FANNUCCI, F., M. FIRPO and M. RAMELLA (1987): Genesi ed evoluzione di piane costiere del Mediterraneo: esempi di piccole piane della Liguria, Geogr. Fis. Dinam. Quat., 10, 193-203. HAMMER, S., and R. ANZOLEAGA (1975): Exploring for stratigraphic traps with gravity gradients, Geophysics, 40, 256-268. HUNT, T., M. SUGIHARA, S. TATSUYA and T. TAKEMURA (2002): Measurements and use of the vertical gravity gradient in correcting repeat microgravity measurement for the effects of ground subsidence in geothermal systems, Geothermics, 31, 525-543. KUMAGAI, N., E. ABE and Y. YOSHIMURA (1960): Measurements of the vertical gradient of gravity, Boll. Geof. Teor & Appl., 8, 607-630. MARSON, I., and E. E. KLINGELE (1993): Advantage of using the vertical gradient of gravity for 3-D interpretation, Geophysics, 58, 1588-1595. PATACCA, E., R. SARTORI and P. SCANDONE (1990): Tyrrhenian basin and Apenninic arcs: kinematic relations since late-Tortonian times, Mem. Soc. Geol. It., 45, 425-451. TELFORD, W. M., L. P. GELDART and R. E. SHERIFF (1990): Applied Geophysics, 2nd ed. Cambrige University Press, New-York, 10-60. THYSSEN-BORNEMISZA, S., and W.F. STACKLER (1956): Observation of the vertical gradient of gravity in the field, Geophysics, 21, 771-779.

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