Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/10893
Authors: Zhao, Liang* 
Paul, Anne* 
Malusà, Marco Giovanni* 
Xu, Xiaobing* 
Zheng, Tianyu* 
Solarino, Stefano* 
Guillot, Stéphane* 
Schwartz, Stéphane* 
Dumont, Thierry* 
Salimbeni, Simone* 
Aubert, Coralie* 
Pondrelli, Silvia* 
Wang, Qingchen* 
Zhu, Rixiang* 
Title: Continuity of the Alpine slab unraveled by high-resolution P wave tomography
Issue Date: 2016
Series/Report no.: 12/121 (2016)
DOI: 10.1002/2016JB013310
URI: http://hdl.handle.net/2122/10893
Abstract: The question of lateral and/or vertical continuity of subducted slabs in active orogens is a hot topic partly due to poorly resolved tomographic data. The complex slab structure beneath the Alpine region is only partly resolved by available geophysical data, leaving many geological and geodynamical issues widely open. Based upon a finite-frequency kernel method, we present a new high-resolution tomography model using P wave data from 527 broadband seismic stations, both from permanent networks and temporary experiments. This model provides an improved image of the slab structure in the Alpine region and fundamental pinpoints for the analysis of Cenozoic magmatism, (U)HP metamorphism, and Alpine topography. Our results document the lateral continuity of the European slab from the Western Alps to the central Alps, and the downdip slab continuity beneath the central Alps, ruling out the hypothesis of slab break off to explain Cenozoic Alpine magmatism. A low-velocity anomaly is observed in the upper mantle beneath the core of the Western Alps, pointing to dynamic topography effects. A NE dipping Adriatic slab, consistent with Dinaric subduction, is possibly observed beneath the Eastern Alps, whereas the laterally continuous Adriatic slab of the Northern Apennines shows major gaps at the boundary with the Southern Apennines and becomes near vertical in the Alps-Apennines transition zone. Tear faults accommodating opposite-dipping subductions during Alpine convergence may represent reactivated lithospheric faults inherited from Tethyan extension. Our results suggest that the interpretations of previous tomography results that include successive slab break offs along the Alpine-Zagros-Himalaya orogenic belt might be proficiently reconsidered.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Zhao_et_al-2016-Journal_of_Geophysical_Research__Solid_Earth.pdfPublished article2.09 MBAdobe PDFView/Open
Show full item record

Page view(s)

21
Last Week
0
Last month
3
checked on Nov 17, 2018

Download(s)

4
checked on Nov 17, 2018

Google ScholarTM

Check

Altmetric