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...

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...

To improve the understanding of formation and evolution sub-continental lithospheric mantle (SCLM) underlying South Australian Craton we have conducted a detailed petrological study on >3,000 xenocrysts from 13 kimberlites emplaced across craton. Pressure (P) temperature (T) estimates Cr diopside garnet been coupled with their chemical concentrations to constrain thickness chemo-lithostratigrap...

On Earth, the velocity at which subducting plates are consumed their trenches (termed “subduction rate” herein) is typically 3 times higher than trench migration velocities. The subduction rate also 5 estimated lower mantle slab sinking rates. Using simple kinematic analyses, we show that if this present-day “kinematic state” operated into past, lithosphere should have accumulated and folded be...

The upper mantle is a heterogeneous mixture of refractory and recycled crustal domains. portions, more fertile thus preferentially melted, dominate the composition basalts erupted on surface, whereas imprint melting counterparts difficult to discern from basalt chemistry. Contrasting radiogenic isotopic signatures mid-ocean ridge oceanic mantle, however, show that Hf isotope ratios may provide ...

The amount of carbon present in Earth's mantle affects the dynamics of melting, volcanic eruption style and the evolution of Earth's atmosphere via planetary outgassing. Mantle carbon concentrations are difficult to quantify because most magmas are strongly degassed upon eruption. Here we report undegassed carbon concentrations from a new set of olivine-hosted melt inclusions from the Mid-Atlan...

The process of stress accumulation near earthquake faults during the aseismic period in between two major seismic events in seismically active regions has become a subject of research during the last few decades. Earthquake fault of finite length of strike-slip nature in a viscoelastic layer over a viscoelastic half space representing the lithosphere-asthenosphere system has been considered her...

Dislocations in solids contribute to anelastic attenuation, relaxation of the shear modulus, transient creep, and steady state flow. These properties of the mantle may therefore be related. The glide and climb of dislocations appear to have the appropriate time constants to explain seismic wave attenuation and mantle viscosity, respectively. The dislocation density of the mantle depends on the ...