Theme 2: Genesis of granitic magmas: Competing models, competing processes

Benjamin Klein Junior keynote speaker /Université de Lausanne (Switzerland)
Bruna Carvalho Junior keynote speaker /Università degli Studi di Padova
Claire Bucholz Overview speaker /Caltech
Tom Sisson Overview speaker /U.S. Geological Survey (USGS)

This theme is about the processes that lead to the formation of granitic (s.l.) magmas, and in particular aims at discussing the various pathways that may lead to them: melting, fractionation, mixing etc. This is the right place to tackle the old issue of the respective roles of mantle and crust. Information can be gained from a range of sources from experiments, models, geochemical data and more.


G. Bergantz (University of Washington)

B. Cesare (Uni. Padova)

C. Miller (Vanderbilt University)

Talks recordings

08:30 – 09:15 – Field and experimental perspectives on the deep origins of convergent-margin plutonic magmas
Overview Keynote – Tom Sisson



 09:15 – 09:30 – An explicit solution for magmatic TiO₂ activity from tandem zircon and titanite thermometry
Erik Schoonover, Michael Ackerson, Joshua Garber, Andrew Smye, Andrew Kylander-Clark, Jesse Reimink


09:30 – 09:45 – Unveiling Complex Reactions During Granitic Magma Interaction: An Experimental Perspective
Marize Muniz da Silva, Yan Lavallée, Anthony Lamur, Daniel Weidendorfer, François Holtz


09:45 – 10:00 – First identification of intermediate-silicic cumulates in the Emeishan large igneous province, SW China
Kwan-Nang Pang, Yang Sun, Christina Yan Wang, Sun-Lin Chung, Hao-Yang Lee


10:30 – 11:00 – Nanogranitoids: tiny melts droplets and great insights into the origin and evolution of granites
Junior Keynote – Bruna B. Carvalho


11:00 – 11:15 – Crustal production in the early Earth: constraints on the sources of water using in-situ oxygen isotopes of zircon from the Archean Lewisian Gneiss Complex
Fernanda Torres Garcia, Silvia Volante, Annika Dziggel, Maria Rosa Scicchitano, J. Elis Hoffmann, Johann Diener


11:15 – 11:30 – Tracking magmatic hybridization processes with zircon and apatite chemical-isotopic systematics, the case of the Sesia Magmatic System (northern Italy)
Caliméria Passos do Carmo, Oscar Laurent, Olivier Vanderhaeghe, Andrea Galli, Emilie Bruand, Lorenzo Tavazzani, Abdelmouhcine Gannoun


11:30 – 11:45 – Mafic to hybrid synplutonic dyke magma injection into subvolcanic granitoid magma chamber of Ladakh batholith, Trans-Himalaya, India: constraints from petrology, geochemistry, and zircon U-Pb-Hf isotopes
Santosh Kumar, Mr. Kapil S Panwar, Dr. Keewook Yi, Dr. Youn-Joong Jeong, Mr. Subhransu Pani


11:45 – 12:00 – Evaluating the role of mafic recharge on the rejuvenation of silicic mushes: A rhyolite-MELTS approach
Blake Wallrich, Guilherme Gualda, Liam Kelly, Calvin Miller


12:00 – 12:15 – Low pressure crystal accumulation and melt segregation within the Western Adamello tonalite (Italy)
Thomas Grocolas, Othmar Müntener


12:15 – 12:30 – S-type granites formed by assimilation-fractional crystallization of I-type granites
Wei Dan, Qiang Wang, Xiu-Zheng Zhang, Gong-Jian Tang


14:00 – 14:45 – Defining Crustal Contributions to Granites through Time
Overview Keynote – Claire E. Bucholz



14:45 – 15:00 – Not all S-type Granites are Created Equal
Chris Spencer, Claire Bucholz, Tiago Angelo, Shaoxiong He, Charlie Oldman, Janne Liebmann, Gui-Mei Lu, Jiyuan Yin, Aaron Cavosie, Clare Warren, Nick Roberts


15:00 – 15:15 – Compositional variability of Andean-type magmatism: a model involving subducted mélange and restite entrainment
Marcos García-Arias, Nathalia Andrea Pineda-Rodríguez, Idael Francisco Blanco Quintero, Matthew Mayne


15:45 – 16:00 – Some granites were hot (>850°C) but most were not (<800°C)
William Collins, J. Bredan Murphy


16:00 – 16:30 – Constraints on the generation of large felsic batholiths from the liquid lines of descent of arc magmas
Junior Keynote – Benjamin Klein, Othmar Müntener, Oliver Jagoutz, Max Schmidt, Nico Kueter


16:30 – 16:45 – Sr-Nd-isotopes documenting granite genesis through crystal fractionation without crustal assimilation: the post-collisional Plutons from the Araçuaí belt, SE Brazil
Clara Onken, Andrea Galli, Andrea Giuliani, Angus Fitzpayne, Bradley Peters, Valdecir Janasi, Max W. Schmidt


16:45 – 17:00 – The formation of granitic rocks in the oceanic crust: Experiments and natural occurrences
Juergen Koepke, Jasper Berndt-Gerdes, Sandrin Feig, Martin Erdmann, Lennart Fischer