According to the three-dimensional P-velocity model of mantle under Eurasia obtained by Taylor approximation method, analysis velocity structure (to depths 2500 km south 50° N and 1700 north) in territory Dnieper-Donetsk depression was carried out order determine possible areas primary hydrogen release. Primary is formed core lower mantle, can be transferred surface (according I.L. Gufeld). sei...

A sensitivity study of stochastic crustal and Moho models on Moho refracted first arrivals is presented. The crustal model is a self-affine velocity structure superposed on a linear velocity gradient. The Moho is represented by a first-order discontinuity with a topography which is also self-affine. The sensitivity of both travel-time and wave-field is considered. We found that the full wave-fi...

Occurrences of diopsidites, rocks made predominantly gem-like diopside whose composition precludes a purely igneous origin, allow tracking the pathway high-temperature fluids and fluid-saturated melts in oceanic lithosphere vicinity mantle-crust transition zone (the Moho) adjacent mantle an setting. We have experimentally explored origin diopsidites by reacting serpentinite with synthetic haplo...

7 Isotropic and anisotropic seismic structures across Northern Apennines (Italy) 8 subduction zone are imaged using a new method for the analysis of teleseismc 9 receiver functions (RFs). More than 13,000 P-wave coda of teleseismic records 10 from the 2003-2007 RETREAT experiment are able to reveal new insights 11 into a peculiar subduction zone which develops at the convergent margin of 12 two...

[1] One process for the formation of continental crust is the accretion of arc terranes at continental margins. A longstanding problem with this model is that although the composition of the continental crust is andesitic, the majority of arc lavas are basaltic. Moreover, those arc lavas that are andesitic tend to be evolved (lower Mg #) compared to the continental crust. Continental crust can ...

Abstract. In this work we present the application of global-phase seismic interferometry (GloPSI) technique to a dataset recorded across Eastern Alps with EASI (Eastern Alpine Seismic Investigation) temporary network. GloPSI aims at rendering an image lithosphere from waves that travel core before reaching stations (i.e. PKP, PKiKP, PKIKP). The is based on principle stack autocorrelations trans...

• Cordilleran Moho temperatures are lower than predicted from surface heat flow. The difference implicates melt and volatile thermodynamics transport. Thermal anomalies correlate to elevation crustal asthenospheric buoyancy. Hydration reaction heating of subduction wedges may dominate elevation. Lithospheric transfer strongly modulates the distributions melt, rock strength, buoyancy that respon...

We demonstrate that observed contrasts of upper crustal structures across large continental strike-slip faults are sufficient to produce artificial vertical Moho offsets of several kilometers in studies using laterally homogenous models. This can have significant impact on efforts to understand how the observed surface displacement is accommodated in the deep crust. An existing hypothesis that ...