T53. The evolution of the Earth's lithosphere: clues from mantle rocks, primary melts and crustal sections

The investigation of tectonically exposed mantle-to-crust sequences, xenoliths, and diamonds offers a unique glimpse into the composition and evolution of the Earth's lithosphere. Petrological and geochemical studies have unambiguously proven the heterogeneous nature of the lithospheric mantle in oceanic and continental (cratonic and off-cratonic) settings. The diverse architectural characteristics of the lithosphere arise from a complex interplay between processes as melt extraction, metasomatism/refertilization, and deformation. Field geology, petrology, geochemistry, HP-HT experiments, and thermodynamic modelling constitute essential and complementary tools for unraveling the nature and evolution of the Earth's lithosphere-asthenosphere system.
This session aims to integrate multidisciplinary studies that bridge micro-scale observations with large-scale geodynamic processes, with the primary goal of exploring i) the physicochemical state and dynamics of the upper mantle, ii) the genesis and transport of primitive melts to the surface, and iii) the cause and effects of melts/fluids infiltration, reaction and crystallisation throughout the lithosphere.
We welcome contributions focused on modern and fossil oceanic lithosphere analogues, orogenic peridotites, mantle-derived xenoliths and diamonds, primary mantle-derived magmas, and experimental samples.