In JoVE (1)
Other Publications (1)
Articles by Rémi Champallier in JoVE
High-pressure, High-temperature Deformation Experiment Using the New Generation Griggs-type Apparatus Jacques Précigout1, Holger Stünitz1,2, Yves Pinquier3, Rémi Champallier1, Alexandre Schubnel3 1Institut des Sciences de la Terre d’Orléans (ISTO), UMR 7327, CNRS-BRGM, Université d’Orléans, 2Department of Geology, University of Tromsø, 3Laboratoire de Géologie, UMR 8538, CNRS, Ecole Normale Supérieure (ENS Paris) Rock deformation needs to be quantified at high pressure. A description of the procedure to perform deformation experiments in a newly designed solid-medium Griggs-type apparatus is here given. This provides technological basis for future rheological studies at pressures up to 5 GPa.
Other articles by Rémi Champallier on PubMed
On the Conditions of Magma Mixing and Its Bearing on Andesite Production in the Crust Nature Communications. Dec, 2014 | Pubmed ID: 25500902 Mixing between magmas is thought to affect a variety of processes, from the growth of continental crust to the triggering of volcanic eruptions, but its thermophysical viability remains unclear. Here, by using high-pressure mixing experiments and thermal calculations, we show that hybridization during single-intrusive events requires injection of high proportions of the replenishing magma during short periods, producing magmas with 55-58 wt% SiO2 when the mafic end-member is basaltic. High strain rates and gas-rich conditions may produce more felsic hybrids. The incremental growth of crustal reservoirs limits the production of hybrids to the waning stage of pluton assembly and to small portions of it. Large-scale mixing appears to be more efficient at lower crustal conditions, but requires higher proportions of mafic melt, producing more mafic hybrids than in shallow reservoirs. Altogether, our results show that hybrid arc magmas correspond to periods of enhanced magma production at depth.