Results 1 to 10 of about 96,005 (268)

Horizontal mantle flow controls subduction dynamics [PDF]

Scientific Reports, 2017
It is generally accepted that subduction is driven by downgoing-plate negative buoyancy. Yet plate age –the main control on buoyancy– exhibits little correlation with most of the present-day subduction velocities and slab dips. “West”-directed subduction
E. Ficini, L. Dal Zilio, C. Doglioni, T. V. Gerya   +3 more
doaj   +9 more sources

Mantle dynamics in the Mediterranean [PDF]

Rev. Geophys., 2014
The Mediterranean offers a unique opportunity to study the driving forces of tectonic deformation within a complex mobile belt. Lithospheric dynamics are affected by slab rollback and collision of two large slowly moving plates forcing fragments of continental and oceanic lithosphere to interact.
Faccenna, Claudio, Becker, Thorsten W., Auer, Ludwig, Billi, Andrea, Boschi, Lapo, Capitanio, Fabio A., Funiciello, Francesca, Horvàth, Ferenc, Jolivet, Laurent, Piromallo, Claudia, Royden, Leigh, Rossetti, Federico, Serpelloni, Enrico, Brun, Jean-Pierre   +13 more
exaly   +11 more sources

Mountain building and mantle dynamics [PDF]

Tectonics, 2013
Mountain building at convergent margins requires tectonic forces that can overcome frictional resistance along large‐scale thrust faults and support the gravitational potential energy stored within the thickened crust of the orogen. A general, dynamic model for this process is still lacking. Here we propose that mountain belts can be classified between
Faccenna, Claudio, Becker, T. W., Conrad, Clinton, Husson, Laurent   +3 more
core   +8 more sources

Decadal change of seismic structure in the Earth’s lowermost mantle [PDF]

Nature Communications
Studying temporal changes of seismic property could provide a direct mean to monitor dynamic processes in the Earth’s lowermost mantle, yet no related seismic observations were discovered.
Xin Zhang, Lianxing Wen
doaj   +2 more sources

Ancient storage of anomalous mercury isotope signatures in the Earth’s transition zone [PDF]

Nature Communications
Characterizing the mantle transition zone (MTZ) is essential for understanding Earth’s evolution and dynamics. Petrological, geochemical, and geophysical evidence suggests that the MTZ may host subducted slabs containing sediments and volatiles ...
Rong Xu, Runsheng Yin, William M. White, Michael Bizimis, Yue Cai, Junbo Zhang, Chunfei Chen, Zhendong Tian, Ting Ruan, Yibing Li, Ganglan Zhang, Liang Liu, Zhongjie Bai, Meifu Zhou, Yongsheng Liu   +14 more
doaj   +2 more sources

Multistage origin of dunite in the Purang ophiolite, southern Tibet, documented by composition, exsolution and Li isotope characteristics of constituent minerals [PDF]

European Journal of Mineralogy, 2020
The Purang ophiolite, which crops out over an area of about 650 km2 in the western Yarlung–Zangbo suture zone, consists chiefly of mantle peridotite, pyroxenite and gabbro.
F. Xiong, F. Xiong, J. Yang, H.-P. Schertl, H.-P. Schertl, Z. Liu, X. Xu   +6 more
doaj   +1 more source

Two new minerals, badengzhuite, TiP, and zhiqinite, TiSi₂, from the Cr-11 chromitite orebody, Luobusa ophiolite, Tibet, China: is this evidence for super-reduced mantle-derived fluids? [PDF]

European Journal of Mineralogy, 2020
Titanium minerals enclosed in corundum separated from the Cr-11 orebody include native Ti, zamboite (FeTiSi2), osbornite (TiN)-khamrabaevite (TiC) solid solutions, and jingsuiite (TiB2), as well as the new minerals badengzhuite (TiP) and zhiqinite (TiSi2)
F. Xiong, F. Xiong, X. Xu, E. Mugnaioli, M. Gemmi, R. Wirth, E. S. Grew, P. T. Robinson, J. Yang, J. Yang, J. Yang   +10 more
doaj   +1 more source

Cenozoic Dynamic Topography of Madagascar

Geochemistry, Geophysics, Geosystems, 2021
It has been proposed that Oligo‐Miocene regional uplift of Madagascar was generated and is maintained by mantle dynamical processes. Expressions of regional uplift include flat‐lying Upper Cretaceous‐Paleogene marine limestones that crop out at ...
S. N. Stephenson, N. J. White, A. Carter, D. Seward, P. W. Ball, M. Klöcking   +5 more
doaj   +1 more source

Thermomechanical modelling of lithospheric slab tearing and its topographic response

Frontiers in Earth Science, 2023
Lithospheric slab tearing, the process by which a subducted lithospheric plate is torn apart and sinks into the Earth’s mantle, has been proposed as a cause for surface vertical motions in excess of 100 s of meters.
Kittiphon Boonma, Kittiphon Boonma, Daniel García-Castellanos, Ivone Jiménez-Munt, Taras Gerya   +4 more
doaj   +1 more source

Feedbacks between a non-Newtonian upper mantle, mantle viscosity structure and mantle dynamics [PDF]

Geophysical Journal International, 2020
SUMMARY Previous studies have shown that a low viscosity upper mantle can impact the wavelength of mantle flow and the balance of plate driving to resisting forces. Those studies assumed that mantle viscosity is independent of mantle flow. We explore the potential that mantle flow is not only influenced by viscosity but can also feedback
A G Semple, A Lenardic
openaire   +1 more source