Understanding the processes that lead to lithosphere thinning is a key aspect of continental geology research. In this paper, we present essential observations and summarize our understandings on accompanying magmatism in eastern China since Mesozoic as straightforward consequence plate tectonics. We show resulted from basal hydration weakening with water coming dehydration paleo-Pacific mantle...

Abstract The Tien Shan provides an ideal site to study mechanism of intracontinental orogeny due distant effect Indo-Asian collision. We investigate lithospheric structures, in particular the lithosphere-asthenosphere boundary (LAB), Central (CTS) using S wave receiver functions. results show distinct structures across orogen. Under southern CTS, LAB is shallower than that Tarim Basin; a 50 km ...

Plate tectonics is the horizontal motion of Earth’s thermal boundary layer (lithosphere) over the convecting mantle (asthenosphere) and is mostly driven by lithosphere sinking in subduction zones. Plate tectonics is an outstanding example of a self organizing, far from equilibrium complex system (SOFFECS), driven by the negative buoyancy of the thermal boundary layer and controlled by dissipati...

Introduction: On Earth magmatism occurs on continents in the absence of subduction, often producing volatile-rich magmas such as those in the Leucite Hills, the Sierra Nevada, and Peru’s Altiplano [1]]. The primary hypothesis to explain this volcanism is foundering of the lower lithosphere into the mantle. The surface of Venus displays volcanic features indicating eruption of lavas with a wide ...

The evolution of the Caribbean plate has resulted in formation volcanic arcs, Large Igneous Province (CLIP) and micro-plates across boundary zones. northern with North American been particularly segmented transition from oblique subduction to collision moving east west. However, there are few constraints on seismic structure upper mantle boundary. Here we use S-to-P receiver functions map veloc...

[1] We explore possible models for the seismological signature of the oceanic lithosphere-asthenosphere boundary (LAB) using the latest mineral-physics observations. The key features that need to be explained by any viable model include (1) a sharp (<20 km width) and a large (5–10%) velocity drop, (2) LAB depth at ~70 km in the old oceanic upper mantle, and (3) an age-dependent LAB depth in the...

Abstract Thick and highly viscous roots are the key to cratonic survival. Nevertheless, can be destroyed under certain geological scenarios. Eruption of mantle plumes underneath cratons reduce root viscosity thus make them more prone deformation by convection. It has been proposed that Indian craton could have thinned due eruption Réunion plume it at ca. 65 Ma. In this study, we constructed sph...

Analyses of Ps and Sp receiver functions from datasets collected by permanent and temporary seismic stations, image a seismic discontinuity, due to a negative velocity contrast across the entire Eastern Alps. The receiver functions show the presence of the discontinuity within the upper mantle with a resolution of tens of kilometers laterally. It is deeper (100-130 km) below the central portion...

Low seismic velocity regions in the mantle and crust are commonly attributed to the presence of silicate melts. Determining melt volume and geometric distribution is fundamental to understanding planetary dynamics. We present a new model for seismic velocity reductions that accounts for the anomalous compressibility of silicate melt, rendering compressional wave velocities more sensitive to mel...