OCGC Seminar - Dr. Stéphane Mazzotti

   

The Yakutat - St. Elias Collision and its Role in Active Tectonics of the Northern Cordillera 

 

Dr. Stéphane Mazzotti 
Géosciences MontpellierUniversité Montpellier 2, France


Friday, May 1st, 2015
11:30 a.m.  

233 Advanced Research Complex (ARC)
University of Ottawa  

 

Abstract

In SE Alaska and SW Yukon, the ongoing collision between the Yakutat block, carried by the Pacific Plate, and the North America Cordillera is a present-day example of the accretion processes that built the Cordillera over the last ~200 Ma. In the collision zone, the Yakutat block accretion results in the highest topography (St. Elias and Denali Ranges) and amongst the highest seismicity rates in North America. The collision also has significant far-field effects, including reactivation of the Cenozoic Denali Fault and other inherited structures. In this presentation I will review new geodetic (GPS), geomorphological, and seismological data that help us better understand the interplay between the collision dynamics and geological structures in cordilleran tectonics.