EAPS DLS - Michael Eddy (Purdue)

Hunting for Fossil Magma Reservoirs in the Geologic Record

Abstract: Plutons offer an opportunity to study the extended history of magmas at depth. Fully exploiting this record requires the ability to track changes in magmatic plumbing systems as magma intrudes, crystallizes, and/or mixes through time. This task has been difficult in granitoid plutons because of low sampling density, poorly preserved or cryptic intrusive relationships, and the difficulty of identifying plutonic volumes that record the contemporaneous presence of melt. In this talk I discuss techniques that can be used to identify ‘fossil magma reservoirs’ within granitoid plutons and how we can use these features to learn about some of the processes that occur beneath volcanoes that erupt high silica rhyolite.

About this Series:
Department Lecture Series at EAPS at MIT is a series of Weekly talks given by leading thinkers in the areas of geology, geophysics, geobiology, geochemistry, atmospheric science, oceanography, climatology, and planetary science. For more information and Zoom password please contact Maggie Cedarstrom: maggie84@mit.edu