scholarly journals Normal thickness of the upper mantle transition zone in NE Brazil does not favour mantle plumes as origin for intraplate Cenozoic volcanism

2014 ◽  
Vol 199 (2) ◽  
pp. 996-1005 ◽  
Author(s):  
A. G. Pinheiro ◽  
J. Julià
Keyword(s):  
Transition Zone ◽  
Upper Mantle ◽  
Mantle Plumes ◽  
Mantle Transition Zone ◽  
Cenozoic Volcanism ◽  
Normal Thickness

Imaging the upper mantle transition zone with a generalized Radon transform of SS precursors

2010 ◽  
Vol 180 (1-2) ◽  
pp. 80-91 ◽  
Author(s):  
Q. Cao ◽  
P. Wang ◽  
R.D. van der Hilst ◽  
M.V. de Hoop ◽  
S.-H. Shim
Keyword(s):  
Transition Zone ◽  
Radon Transform ◽  
Upper Mantle ◽  
Mantle Transition Zone ◽  
Generalized Radon Transform ◽  
Ss Precursors

scholarly journals Seismic waveform tomography of the central and eastern Mediterranean upper mantle

Solid Earth ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 669-690 ◽  
Author(s):  
Nienke Blom ◽  
Alexey Gokhberg ◽  
Andreas Fichtner
Keyword(s):  
Subduction Zone ◽  
Transition Zone ◽  
Upper Mantle ◽  
High Velocity ◽  
Eastern Mediterranean ◽  
Crust And Upper Mantle ◽  
Mantle Transition Zone ◽  
Seismic Waveform ◽  
Waveform Tomography ◽  
Seismic Waveform Tomography

Abstract. We present a seismic waveform tomography of the upper mantle beneath the central and eastern Mediterranean down to the mantle transition zone. Our methodology incorporates in a consistent manner the information from body and multimode surface waves, source effects, frequency dependence, wavefront healing, anisotropy and attenuation. This allows us to jointly image multiple parameters of the crust and upper mantle. Based on the data from ∼ 17 000 unique source–receiver pairs, gathered from 80 earthquakes, we image radially anisotropic S velocity, P velocity and density. We use a multi-scale approach in which the longest periods (100–150 s) are inverted first, broadening to a period band of 28–150 s. Thanks to a strategy that combines long-period signals and a separation of body and surface wave signals, we are able to image down to the mantle transition zone in most of the model domain. Our model shows considerable detail in especially the northern part of the domain, where data coverage is very dense, and displays a number of clear and coherent high-velocity structures across the domain that can be linked to episodes of current and past subduction. These include the Hellenic subduction zone, the Cyprus subduction zone and high-velocity anomalies beneath the Italian peninsula and the Dinarides. This model is able to explain data from new events that were not included in the inversion.

scholarly journals Mantle transition zone thickness beneath Cameroon: evidence for an upper mantle origin for the Cameroon Volcanic Line

2011 ◽  
Vol 187 (3) ◽  
pp. 1146-1150 ◽  
Author(s):  
Angela Marie Reusch ◽  
Andrew A. Nyblade ◽  
Rigobert Tibi ◽  
Douglas A. Wiens ◽  
Patrick J. Shore ◽  
...  
Keyword(s):  
Transition Zone ◽  
Upper Mantle ◽  
Mantle Transition Zone ◽  
Cameroon Volcanic Line ◽  
Mantle Origin

Mantle transition zone beneath the central Tien Shan: Lithospheric delamination and mantle plumes

2018 ◽  
Vol 723 ◽  
pp. 172-177 ◽  
Author(s):  
Grigoriy Kosarev ◽  
Sergey Oreshin ◽  
Lev Vinnik ◽  
Larissa Makeyeva
Keyword(s):  
Transition Zone ◽  
Tien Shan ◽  
Mantle Plumes ◽  
Mantle Transition Zone
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