4-4-4-4-4-4-4-4-4-4-4-4-4 From: Anderson Costa <andcostasantos@xxxxxxxxx> Dear colleagues, I hope this email finds you well and healthy. I would like to present our Theme 8, session 4 - oceanic lithosphere evolution: crust-mantle geodynamics to melt processes and reservoirs at the IGC 2024 ( https://urldefense.com/v3/__https://www.igc2024korea.org/content/14403__;!!IKRxdwAv5BmarQ!YnGaaYJUAyLMxTJRU0IoYBmdQahWBA7oVI4PjuTySVfQHOM8ZLEJ4SAaVAxNYs0j2sB8nu6VsJeOGSSf$ <https://urldefense.com/v3/__https://www.igc2024korea.org/content/14403__;!!IKRxdwAv5BmarQ!a4BtSAXOZqDcQPQZIfSYEQ7J5nssPLXucj3oiR45T_ut5_qRklwZAZ8U9i14yBKTBOsIzOoY-BXJDAM4K_BebVlT6FTf$>) . We also have a short course related to Brazilian Alkaline Magmatism (short course 17). Theme 8 - session 4: 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. These include: active plumes, whose influence is a matter of debate, and extending to 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 is 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' and back to Wilson's Cycle in a continuous planetary heritage. If you can help to spread out our session between your partners, it will be awesome. Looking forward to hearing from you. Please, see all needed information attached. Best regards, The conveners Anderson Costa dos SANTOS (Rio de Janeiro State University) Julio Cesar Horta de Almeida (Rio de Janeiro State University-UERJ) Henrique Bruno (Rio de Janeiro State University-UERJ) Eduardo Reis Viana Rocha-Júnior (Bahia Federal University-UFBA) Juliana Fernandes Bonifácio (São Paulo University-USP) *Keynote speaker*: Webster Mohriak (Rio de Janeiro State University) 4-4-4-4-4-4-4-4-4-4-4-4-4 ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). ASU - http://www.asu.edu/ PSU - https://urldefense.com/v3/__http://pdx.edu/__;!!IKRxdwAv5BmarQ!YnGaaYJUAyLMxTJRU0IoYBmdQahWBA7oVI4PjuTySVfQHOM8ZLEJ4SAaVAxNYs0j2sB8nu6VsNF4IUsp$ GVP - https://urldefense.com/v3/__https://volcano.si.edu/__;!!IKRxdwAv5BmarQ!YnGaaYJUAyLMxTJRU0IoYBmdQahWBA7oVI4PjuTySVfQHOM8ZLEJ4SAaVAxNYs0j2sB8nu6VsNhZrETd$ IAVCEI - https://urldefense.com/v3/__https://www.iavceivolcano.org/__;!!IKRxdwAv5BmarQ!YnGaaYJUAyLMxTJRU0IoYBmdQahWBA7oVI4PjuTySVfQHOM8ZLEJ4SAaVAxNYs0j2sB8nu6VsEOasOSZ$ To subscribe to the volcano list, send the message: subscribe volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx. To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments. ============================================================== ------------------------------ End of Volcano Digest - 1 Feb 2024 to 3 Feb 2024 (#2024-12) ***********************************************************
