Fabio Crameri
University of Oslo
Publications 22
#1Fabio Crameri (University of Oslo)H-Index: 7
#2Clinton P. Conrad (University of Oslo)H-Index: 34
Last.Carolina Lithgow-Bertelloni (UCL: University College London)H-Index: 32
view all 4 authors...
Abstract As the Earth's primary mode of planetary cooling, the oceanic plate is created at mid-ocean ridges, transported across the planet's surface, and destroyed at subduction zones. The evolution of its buoyancy and rheology during its lifespan maintains the coherence of the plate as a distinct geological entity and controls the localised deformation and vertical material exchange at plate boundaries, which enables the horizontal ocean-plate movements. These motions intimately link the oceani...
Today's Geodynamic models can, often do, and sometimes have to become very complex. Their underlying, increasingly elaborate numerical codes produce a growing amount of raw data. Post-processing such data becomes therefore more and more challenging and time consuming. In addition, visualising processed data and results has, in times of coloured figures and a wealth of half-scientific software, become one of the weakest pillars of science, widely mistreated and ignored. Efficient and automated Ge...
#1Fabio Crameri (University of Oslo)H-Index: 7
#2Carolina Lithgow-Bertelloni (UCL: University College London)H-Index: 32
Abstract The sinking remnant of a surface plate crosses and interacts with multiple boundaries in Earth's interior. Here, we specifically investigate the prominent dynamic interaction of the sinking plate portion with the upper-mantle transition zone and its corresponding surface elevation signal. We unravel, for the first time, that the collision of the sinking slab with the transition zone induces a sudden, dramatic downward tilt of the upper plate towards the subduction trench. Unraveling thi...
#1Fabio Crameri (University of Oslo)H-Index: 7
Unlike Earth, Venus lacks discrete, moving plates. Analogue model experiments suggest that observed hints at plate recycling do indeed indicate current, localized destruction of the Venusian surface.
#1Fabio CrameriH-Index: 7
Last.Paul J. TackleyH-Index: 54
view all 3 authors...
The long-wavelength surface deflection of Earth's outermost rocky shell is mainly controlled by large-scale dynamic processes like isostasy or mantle flow. The largest topographic amplitudes are therefore observed at plate boundaries due to the presence of large thermal heterogeneities and strong tectonic forces. Distinct vertical surface deflections are particularly apparent at convergent plate boundaries mostly due to the convergence and asymmetric sinking of the plates. Having a mantle convec...
#1Fabio Crameri (UCL: University College London)H-Index: 7
#2Carolina Lithgow-Bertelloni (UCL: University College London)H-Index: 32
Last.Paul J. Tackley (ETH Zurich)H-Index: 54
view all 3 authors...
Subduction initiation is a key in understanding the dynamic evolution of the Earth and its fundamental difference to all other rocky planetary bodies in our solar system. Despite recent progress, the question about how a stiff, mostly stagnant planetary lid can break and become part in the global overturn of the mantle is still unresolved. Many mechanisms, externally or internally driven, are proposed in previous studies. Here, we present the results on subduction initiation obtained by dynamica...
#1Neil Cagney (UCL: University College London)H-Index: 6
#2Fabio Crameri (UCL: University College London)H-Index: 7
Last.John Whitehead (WHOI: Woods Hole Oceanographic Institution)H-Index: 61
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Abstract In order to link the geochemical signature of hot spot basalts to Earth's deep interior, it is first necessary to understand how plumes sample different regions of the mantle. Here, we investigate the relative amounts of deep and shallow mantle material that are entrained by an ascending plume and constrain its source region. The plumes are generated in a viscous syrup using an isolated heater for a range of Rayleigh numbers. The velocity fields are measured using stereoscopic Particle-...
#1Fabio Crameri (ETH Zurich)H-Index: 7
#2Paul J. Tackley (ETH Zurich)H-Index: 54
Recent advances in numerical modeling allow global models of mantle convection to more realistically reproduce the behavior at convergent plate boundaries; in particular, the inclusion of a free surface at the outer boundary has been shown to facilitate self-consistent development of single-sided subduction. This allows for a more extensive study of subduction in the context of global mantle convection, as opposed to commonly used regional models. Our first study already indicated important diff...