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January 25 @ 4:00 pm - 5:00 pm CST

EEPS Seminar: James Chapman, Department of Geosciences, University of Arizona



The Isotopic Record Of Cordilleran Magmatism: Implications For Orogenic Cyclicity


Subduction-related magmatism is one of the most valuable geologic records available for interpreting tectonic and geodynamic processes in Cordilleran orogens.  This talk explores orogen-scale spatial and temporal trends in the radiogenic isotopic composition of magmatism.  Data from the U.S. Cordillera, central Andes, and southern Tibet are investigated to help resolve the origin of these trends and what they can tell us about the chemical and structural evolution of the lithosphere.  Periodic shifts to more evolved isotopic compositions of magmatic rocks is a key component to models of orogenic cyclicity.  The isotopic shifts have traditionally been linked to retroarc underthrusting of continental lithosphere, however, they may also be explained by arc migration


January 25
4:00 pm - 5:00 pm


100 Keith-Wiess Geological Laboratories
Rice University, 6100 Main Street, MS 126
Houston, TX 77005 United States
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For outside visitors, the best way to get to our department is to come in on Rice Blvd and turn into entrance 20 (intersection of Rice and Kent St.). At the stop sign, you will see a visitor parking lot.  From there, walk east to the department.  The google map below shows exactly where our building is.