NW Canada and Alaska are the continuation of North American Cordillera through Mexico, western USA Canada. I show that they have similar thermal regimes control tectonics seismicity. first summarize multiple constraints to crust upper mantle temperatures then discuss some consequences. There bimodal characteristic most subduction zones: cool forearc, uniformly hot backarc (Yukon Composite Terra...

Volatiles play a pivotal role in subduction zone evolution, yet their pathways remain poorly constrained. Studying the Lesser Antilles can yield new constraints, where old oceanic lithosphere formed by slow-spreading subducts slowly. Here we use local earthquakes recorded temporary VoiLA (Volatile recycling Antilles) deployment of ocean-bottom seismometers fore- and back-arc to characterize 3-D...

The goal of this study is to constrain the origins layering in seismic velocity structure within cratonic mantle lithosphere (i.e. mid-lithospheric discontinuities [MLDs]). For long-lived stations cratons worldwide, we calculated S-to-P converted phase receiver function stacks using time domain deconvolution and a k-means algorithm select robust, consistent functions. Negative MLDs appear only ...

[1] We present a novel explanation for absolute trench-normal motions of slabs surrounding the Pacific. Rapid subduction-zone retreat on the eastern side of the Pacific and slow advance in the west can result from the large-scale asymmetric plate configuration. We use simple fluid dynamics to explain the mechanical background of this hypothesis, and we use the results of a simple finite differe...

The particle-in-cell method is generally considered a flexible and robust method to model the geodynamic problems with chemical heterogeneity. However, velocity interpolation from grid points to particle locations is often performed without considering the divergence of the velocity field, which can lead to significant particle dispersion or clustering if those particles move through regions of...

Abstract Northeast China hosts one of the largest Cenozoic intraplate volcanic regions in world. However, mechanisms that generate volcanism, its spatial-temporal distribution, and compositional signatures remain highly debated due to lack high-resolution images mantle's thermochemical structure. We jointly inverted new surface-wave dispersion data, surface heat flow, geoid height, elevation da...

While hotspot tracks beneath thin oceanic lithosphere are visible as volcanic island chains, the plume-lithosphere interaction for thick continental or cratonic often remains hidden due to lack of volcanism. To identify plume with missing volcanism, we characterize amplitude and timing surface heat flux anomalies following a using mantle convection models. Our numerical results confirm an analy...

A new 3D S-velocity model for the crust and upper mantle beneath Yellow Sea, East China Japan Philippine Sea is determined by means of Rayleigh-wave analysis depths ranging from 0 to 400 km, most conspicuous features earth structure in this region are revealed model. In depth range 5 30 principally affected thickness crust. areas with thin (oceanic crust), highest values determined, while lower...