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Upper mantle flow in the western Mediterranean

Abstract

Two cross-sections of the western Mediterranean Neogene-to-present backarc basin are presented, in which geological and geophysical data of the Transmed project are tied to a new shear-wave tomography. Major results are i) the presence of a well stratified upper mantle beneath the older African continent, with a marked low-velocity layer between 130-200 km of depth; ii) the dilution of this layer within the younger western Mediterranean backarc basin to the north, and iii) the easterly raising of a shallower low-velocity layer from about 140 km to about 30 km in the Tyrrhenian active part of the backarc basin. These findings suggest upper mantle circulation in the western Mediterranean backarc basin, mostly easterly-directed and affecting the boundary between upper asthenosphere (LVZ) and lower asthenosphere, which undulates between about 180 km and 280 km. (author)
Authors:
Panza, G F; [1]  Raykova, R; [2]  Carminati, E; Doglioni, C [3] 
  1. Dipartimento di Scienze della Terra, Universita degli Studi di Trieste, Trieste (Italy) and Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)
  2. Geophysical Institute of BAS, Sofia (Bulgaria) and Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna (Italy)
  3. Dipartimento di Scienze della Terra, Universita degli Studi di Trieste, Trieste (Italy)
Publication Date:
Jul 15, 2006
Product Type:
Technical Report
Report Number:
IC-2006/056
Resource Relation:
Other Information: refs, 4 figs
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AFRICA; CROSS SECTIONS; DILUTION; GEOLOGY; GEOPHYSICS; MEDITERRANEAN SEA; SHEAR; TOMOGRAPHY
OSTI ID:
20840411
Research Organizations:
Abdus Salam International Centre for Theoretical Physics, Trieste (Italy)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: Project MIUR PRIN 2004; PNRA 2.7-2.8 - 2004-2006; ALPS I/II/3.3.02; TRN: XA0602355013679
Availability:
Available from INIS in electronic form; Also available at: http://www.ictp.it
Submitting Site:
INIS
Size:
25 pages
Announcement Date:
Mar 21, 2007

Citation Formats

Panza, G F, Raykova, R, Carminati, E, and Doglioni, C. Upper mantle flow in the western Mediterranean. IAEA: N. p., 2006. Web.
Panza, G F, Raykova, R, Carminati, E, & Doglioni, C. Upper mantle flow in the western Mediterranean. IAEA.
Panza, G F, Raykova, R, Carminati, E, and Doglioni, C. 2006. "Upper mantle flow in the western Mediterranean." IAEA.
@misc{etde_20840411,
title = {Upper mantle flow in the western Mediterranean}
author = {Panza, G F, Raykova, R, Carminati, E, and Doglioni, C}
abstractNote = {Two cross-sections of the western Mediterranean Neogene-to-present backarc basin are presented, in which geological and geophysical data of the Transmed project are tied to a new shear-wave tomography. Major results are i) the presence of a well stratified upper mantle beneath the older African continent, with a marked low-velocity layer between 130-200 km of depth; ii) the dilution of this layer within the younger western Mediterranean backarc basin to the north, and iii) the easterly raising of a shallower low-velocity layer from about 140 km to about 30 km in the Tyrrhenian active part of the backarc basin. These findings suggest upper mantle circulation in the western Mediterranean backarc basin, mostly easterly-directed and affecting the boundary between upper asthenosphere (LVZ) and lower asthenosphere, which undulates between about 180 km and 280 km. (author)}
place = {IAEA}
year = {2006}
month = {Jul}
}