1-1-1-1-1-1-1-1-1-1-1-1-1-1 From: Leticia Freitas Guimaraes <lefguimaraes@xxxxxxxxxxxx> Dear friends and colleagues, Are you working or interested on the oceanic lithosphere evolution? So, weâ??d like to draw your attention to our session â??Oceanic lithosphere evolution: Crust-mantle geodynamics to melt processes and reservoirsâ??, to be held at Goldschmidt 2024. Registration for the Conference is already open, and we invite you to submit your abstract to our session. **3a - Oceanic lithosphere evolution: Crust-mantle geodynamics to melt processes and reservoirs** Theme 03: Crustal processes and evolution Description: The complex evolution of the oceanic lithosphere since continentals' breakup must be unravelled if we would like to better understand the dynamics of Earth cycles, mantle convection, and plate motion. A comprehensive understanding of the evolution and the relationship between continental and oceanic lithospheres, analyzing the complex evolutionary conjugated margins and their COB and/or COT, to unravel the oceanic lithosphere which requires consideration of different geotectonic contexts and structures, from basement reactivation, active mid-ocean ridges, aseismic ridges, oceanic plateaus, microplates, seamount ridges, continental crust fragments, including SCLM or exhumed mantle, as well as the structure and constitution of the continental margins and structural heritage. The composition of the oceanic crust accreted along mid-ocean ridges depends not only on heterogeneous mantle sources, but also on the modalities of melt differentiation and migration during its ascent towards the surface, and the magmatic evolution and interaction through time, where migration potentially triggers melt reactions/interactions and, therefore, challenges historical models of melt differentiation. In addition to crustal heterogeneities inherited from several factors previously discussed, other processes may increase the complexity of oceanic crust evolution: active plumes, ancient delaminated continental crust, oceanic slabs dehydration, sediments input, among others. The results of geophysical, structural geological, tectonic, and petrological surveys are refreshing concepts, and linking mantle and crustal dynamics in oceanic regions are the focus of our session. This session will also focus on geodynamic reconstructions and the evolution of all oceanic crust records, including their conjugated margins, 'from birth to death'. Looking forward to seeing you in Chicago. Best regards, *Anderson Costa dos Santos* *LetÃcia Freitas Guimarães* *Júlia Mattioli Rolim* 1-1-1-1-1-1-1-1-1-1-1-1-1-1 ------------------------------
