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Thursday 28 March, 2019
4:00 – 4:45pm
You are invited to join us afterwards for refreshments provided by our local SEG Student
Chapter in the Resource Room, Robert Street Building
Robert Street Building Lecture Theatre (G.16),
Ground Floor Robert Street Building,
University of Western Australia,
35 Stirling Hwy,
Crawley 6009.
Jon Blundy
Professor, University of Bristol, England
Modern views of igneous systems are moving increasingly away from the longstanding large magma chamber paradigm towards a more nuanced concept of transcrustal magmatic mushes, wherein the dominant mechanism of igneous differentiation is percolative reactive flow, rather than traditional crystal settling. The melts that populate these mushy systems have significantly higher dissolved volatile (H2O, CO2) contents than previously assumed, with important consequences for the chemical evolution of fluids and melts. Such systems not only involve magma differentiation over a considerable depth and time ranges, but are also inherently unstable gravitationally. raising the potential for catastrophic discharge of magmas and/or fluids. In this talk I will discuss the implications of volatile-rich, transcrustal magmatic systems for porphry copper mineralisation
