Please use this identifier to cite or link to this item:
Authors: Cocchi, L.* 
Caratori Tontini, F.* 
Carmisciano, C.* 
Marani, M.* 
Title: Tortonian-Pleistocenic oceanic features in the Southern Tyrrhenian Sea: magnetic inverse model of the Selli-Vavilov region
Issue Date: 2008
Series/Report no.: /29 (2008)
DOI: 10.1007/s11001-009-9061-5
Keywords: Geomagnetism
Oceanic crust
Volcanic structure
Subject Classification04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies 
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 
05. General::05.01. Computational geophysics::05.01.03. Inverse methods 
Abstract: We show the magnetic model of the Selli-Vavilov region. The Selli Line is known as the northwestern edge of the southern Tyrrhenian basin. The tectonic evolution of the Tyrrhenian basin is dominated by a Tortonian - Quaternary extension through the eastward movement of the Apennine subduction system. This migration has generated a diffuse stretching of the continental crust with the emplacement of new oceanic material. This latter occurred in several localized zones where the eastward retreating of the Ionian subduction system produced a strong depletion of the crust with formation of basins and correlated spreading. Nowadays the presence of oceanic crust is confirmed through direct drilling investigation but a complete mapping of the oceanic crustal distribution is still lacking. The Selli-Vavilov region shows a differentiated crustal setting where seamount structures, the oceanic basement portions and continental crust blocks are superimposed. To this aim, a 2D inversion of the magnetic data of this region was conducted to define buried structures. The magnetic susceptibility pattern was computed by solving the least squares problem of the misfit between the predicted and real data for separated wavebands. This method produced two 2D models of the high and low frequency fields of the Selli-Vavilov region. The two apparent susceptibility maps provide different information for distinct ranges of depth. The results of the inversions were also combined with seismic data of the Selli region highlighting the position of the highly-magnetized buried bodies. The results confirm a role for the Selli Line as a deep crustal boundary dividing the Sardinian passive domain from the easternmost active region where different oceanic structures are located. The Selli Line has worked as a detachment fault system which has moved eastward. Finally, the Selli-Vavilov region may be interpreted as a tectonic result due to a passive asymmetrical rift occurred between the Tortonian and Pliocene.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Cocchi_etal_2008_mager.pdfmain article1.05 MBAdobe PDFView/Open
Show full item record

Page view(s)

Last Week
Last month
checked on Aug 15, 2018


checked on Aug 15, 2018

Google ScholarTM