Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6313
AuthorsPiccinini, D.* 
Di Bona, M.* 
Lucente, F. P.* 
Levin, V.*
Park, J.*
TitleSeismic attenuation and mantle wedge temperature in the northern Apennine subtuction zone (Italy) from teleseismic body wave spectra.
Issue Date14-Sep-2010
Series/Report no./115 (2010)
DOI10.1029/2009JB007180
URIhttp://hdl.handle.net/2122/6313
KeywordsNorthern Apennine
Slab
RETREAT
attenuation
mantle
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.03. Mantle and Core dynamics 
04. Solid Earth::04.01. Earth Interior::04.01.05. Rheology 
04. Solid Earth::04.02. Exploration geophysics::04.02.06. Seismic methods 
04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics 
AbstractWe analyze P and S wave spectra from moderate‐ to deep‐focus teleseisms recorded at the Retreating‐Trench, Extension, and Accretion Tectonics (RETREAT) temporary broadband seismic network to assess the variations of the Earth mantle attenuation in the northern Apennines region (Italy). For each earthquake, we compute the ratio between the spectrum at each station and the average spectrum, in order to estimate t* residuals (Δt*) from the spectral ratio decay. The number and distribution of the teleseisms useable for the P wave t* calculation allow for a gross azimuthal analysis; although the (Δt*) values at single station display, in most cases, azimuthal‐dependent fluctuations, their overall distribution shows a partition of the study region into two main areas, whose gross features remain almost unchanged over the whole azimuthal range. This partition is confirmed by the S wave t* mean values, computed for each station over the set of useable events. We distinguish a relatively high attenuation area on the western, Tyrrhenian side and a relatively low attenuation area on the eastern, Adriatic side. By correlating our Δt* estimates and the velocity structure derived from the existing tomographic models, we compute the ranges of possible P and S wave Q values in the mantle wedge above the Apennines slab (on the Tyrrhenian side) and in the asthenosphere below the Adriatic region. Furthermore, the determined attenuation properties are used to draw some inferences on the thermal state of the uppermost mantle and on the physical properties of the tectonic elements, which constitute the subduction system in the region.
DescriptionAn edited version of this paper was published by AGU. Copyright (2010) American Geophysical Union.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
2009JB007180.pdf1.93 MBAdobe PDFView/Open
Show full item record

Page view(s)

407
Last Week
0
Last month
5
checked on Jul 23, 2017

Download(s)

28
checked on Jul 23, 2017

Google ScholarTM

Check

Altmetric