Abstract The Ontong Java Plateau in the western Pacific Ocean is world’s largest oceanic plateau. It was formed 122 million years ago by a massive volcanic event that significantly affected Earth’s environment. cause of magmatic remains controversial because upper mantle structure beneath plateau poorly known. Here we use passive seismic data obtained through seafloor observations, alongside ex...

Most of the earthquake faults in North-East India, China, mid Atlantic-ridge, the Pacific seismic belt and Japan are found to be predominantly dip-slip in nature. In the present paper a dip-slip fault is taken situated in an elastic layer over a viscoelastic half space representing the lithosphere-asthenosphere system. A movement of the dip-slip nature across the fault occurs when the accumulat...

[1] We investigate the lithospheric and upper mantle shear wave velocity structure and the depth-dependence of anisotropy along the Red Sea and beneath the Arabian Peninsula using receiver function constraints and phase velocities of surface waves traversing two transects of stations from the Saudi Arabian National Digital Seismic Network. Frequency-dependent phase delays of fundamental-mode Lo...

Hot plumes rising from Earth's deep mantle are thought to cause uplift, rifting and large igneous province (LIP) emplacement. LIP volcanism in continents often spans tens of Ma scatters unevenly over broad areas. This has been attributed lateral flow hot plume material, but observational evidence on such is scarce. New waveform tomography with massive data sets reveals detailed seismic velocity...

We suggest a method of fitting of a zero-range model of a tectonic plate under a boundary stress on the basis of comparison of the theoretical formulae for the corresponding eigenfunctions/eigenvalues with the results extraction under monitoring, in the remote zone, of non-random (regular) oscillations of the Earth with periods 0.2-6 hours, on the background seismic process, in case of low seis...

[1] In order to constrain the vertical and lateral extent of deformation and the interactions between lithosphere and asthenosphere in a context of a transpressional plate boundary, we performed teleseismic shear wave splitting measurements for 65 permanent and temporary broadband stations in central California. We present evidence for the presence of two anisotropic domains: (1) one with clear...

Previous modeling of carbonate subduction by high-pressure experimentation has allowed to propose scenarios for bulk carbon return the mantle, but detailed transfer mechanisms have seldom been studied. We monitored carbonate–silicate reactions combining experiments and synchrotron-based X-ray diffraction. Carbonates break down at moderate pressure high temperature CO2 is trapped grain boundarie...