Please use this identifier to cite or link to this item:
Authors: Zhao, Liang* 
Paul, Anne* 
Guillot, Stéphane* 
Solarino, Stefano* 
Malusa, Marco G.* 
Zheng, Tianyu* 
Aubert, Coralie* 
Salimbeni, Simone* 
Dumont, Thierry* 
Schwartz, Stéphane* 
Zhu, Rixiang* 
Wang, Qingchen* 
Title: First seismic evidence for continental subduction beneath the Western Alps
Journal: Geology 
Series/Report no.: /43 (2015)
Issue Date: 2015
DOI: 10.1130/G36833.1
Subject Classification04.01. Earth Interior 
04.07. Tectonophysics 
Abstract: The first discovery of ultrahigh-pressure coesite in the European Alps 30 years ago led to the inference that a positively buoyant continental crust can be subducted to mantle depth; this had been considered impossible since the advent of the plate tectonics concepts. Although continental subduction is now widely accepted, there remains debate because there is little direct (geophysical) evidence of a link between exhumed coesite at the surface and subducted continental crust at depth. Here we provide the first seismic evidence for continental crust at 75 km depth that is clearly connected with the European crust exactly along the transect where coesite was found at the surface. Our data also provide evidence for a thick suture zone with downward-decreasing seismic velocities, demonstrating that the European lower crust underthrusts the Adriatic mantle. These findings, from one of the best-preserved and long-studied ultrahigh-pressure orogens worldwide, shed decisive new light on geodynamic processes along convergent continental margins.
Appears in Collections:Article published / in press

Files in This Item:
File Description SizeFormat Existing users please Login
geology_zhao_et_al._2015.pdf4.47 MBAdobe PDF
Geology2015_Zhao_etal_supp (1).pdf1.62 MBAdobe PDFView/Open
Show full item record

Citations 50

checked on Jul 2, 2020

Page view(s)

Last Week
Last month
checked on Jul 6, 2020


checked on Jul 6, 2020

Google ScholarTM