*Magma Chamber Simulator Workshop at IAVCEI 2017 Portland Oregon* ** Please join us for a two-day workshop on the *Magma Chamber Simulator (MCS)*, Saturday August 12 and Sunday August 13 in Portland Oregon in association with the 2017 IAVCEI meeting. The Magma Chamber Simulator is an energy- and mass-constrained computer code (Bohrson et al. 2014) that simultaneously models recharge/magma mixing, crustal assimilation and crystal fractionation (RAFC). For a crustal magma body, MCS tracks the thermal, mass, and compositional (major and trace element, isotope, and phase equilibria) evolution as magma undergoes RAFC. During the first day of this workshop, participants will do hands-on exercises that will familiarize them with running the Magma Chamber Simulator (input, steps to run code), and archiving and effectively utilizing output. The second day will involve modelling specific scenarios (e.g., RAFC, AFC, RFC) so participants can develop an understanding of how to effectively model RAFC using their own data or data provided by conveners. We welcome petrologists at all levels: students, early career professionals and middle and later career professionals too! With training in this two-day workshop, students (undergraduate and graduate students) can master the use of the code. MCS can also be used in the classroom or lab, so we welcome those who are interested in integrating MCS into their petrology/geochemistry classes. Please register for this workshop (and the 2017 IAVCEi meeting) by going to http://iavcei2017.org/registration.html and clicking the Registration Now Open -*click here* button. If you have already registered for the meeting, log into your account and add the workshop. The cost for the two-day workshop is $210. If you have questions, please contact one of the conveners: Wendy Bohrson, Central Washington University, Bohrson@geology.cwu.edu <mailto:Bohrson@geology.cwu.edu> Frank Spera, University of California, Santa Barbara, spera@geol.ucsb.edu Jussi Heinonen, University of Helsinki, jussi.s.heinonen@helsinki.fi We hope to see you in Portland! Best regards, Wendy, Frank and Jussi