6-6-6-6-6-6-6-6-6-6-6-6-6 From: Maurizio Petrelli <maurizio.petrelli@xxxxxxxx> Dear colleagues, We would like to invite you in joining the following session at *Goldschmidt 2020* (June 21-26). Theme 05: Volcanism in the Earth System Session 05d: Constraining Petrological and Geochemical Variations in Magmas to Capture the Evolution of Volcanoes over Space and Time *Url: http://bit.ly/goldschmidt_5d <http://bit.ly/goldschmidt_5d>* Confirmed Keynote: *Lucy McGee* (University of Adelaide) *Conveners:* M. Petrelli, G.F. Zellmer, E. Johnson, J. Roberge, and M. Rowe *Session Description:* To capture and describe the temporal and spatial evolution of magmatic systems, both within volcanic fields and at individual volcanoes, we require new methods and techniques involving many disciplines, including geochemistry, petrology, volcanology, geophysics, and numerical modeling. Temporal and spatial variations in magma evolution reflect a variety of processes, including changing mantle sources, crustal interactions, magma ascent dynamics, pathways, and storage. How do magmas move, through percolation or fracture propagation? What are the rates of magma ascent? How do melts avoid trapping by ductile upper crustal mush zones? Does the chemical stratigraphy of the crystal cargo, including the microlites, provide information about the history of the melt phase, or are crystals dominantly of antecrystic origin? Do magmatic volatiles drive magma ascent, and to what degree do they influence ascent rates and eruptive style? How reliable are melt inclusions in recording the volatile evolution of these melts from source to surface? How do along- or across-arc variations in magma geochemistry provide insights into changing mantle source region dynamics and crustal processing? We invite studies from all tectonic settings (ocean ridges, ocean islands, subduction zones, back-arc basins, petit-spots, intracontinental rifts, monogenetic volcanic fields) that utilize geochemistry and petrology to investigate temporal and/or spatial changes in magmatic systems to improve our understanding of magma sources and magma transport within volcanoes or volcanic fields. We particularly encourage cross-disciplinary studies and those that can provide constraints on how these variations relate to an understanding of volcanic and tectonic processes. 6-6-6-6-6-6-6-6-6-6-6-6-6 ------------------------------
