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Thermochronology to characterize subduction complex exhumation and implications for western North American margin evolution
Exhumed subduction complexes provide a window into modern subduction processes, but exhumational overprint makes relating fossil and modern deformation difficult. Understanding exhumation timing is therefore crucial for interpreting subduction complex deformation.
The Condrey Mountain Schist, a subduction complex in northern California, has a particularly long-lived blank spot in its tectonic history, with nearly 100 Ma unaccounted for between the end of subduction metamorphism and the onset of final exhumation. The location of the Condrey Mountain Schist above long-lived subduction of the Farallon and Juan de Fuca plates makes the exhumation history an interesting puzzle with implications for western North American margin evolution.
The Condrey Mountain Schist, a subduction complex in northern California, has a particularly long-lived blank spot in its tectonic history, with nearly 100 Ma unaccounted for between the end of subduction metamorphism and the onset of final exhumation. The location of the Condrey Mountain Schist above long-lived subduction of the Farallon and Juan de Fuca plates makes the exhumation history an interesting puzzle with implications for western North American margin evolution.
The goal of this M.S. thesis is to constrain the timing and processes of Condrey Mountain Schist exhumation. The selected student will use (U-Th)/He and Zircon Fission Track thermochronometers on existing samples to determine cooling histories. We seek a Masters-level Earth Sciences student with an interest - or previous coursework - in geochronology and tectonics.
The goal of this M.S. thesis is to constrain the timing and processes of Condrey Mountain Schist exhumation. The selected student will use (U-Th)/He and Zircon Fission Track thermochronometers on existing samples to determine cooling histories. We seek a Masters-level Earth Sciences student with an interest - or previous coursework - in geochronology and tectonics.
This project is in the Structural Geology & Tectonics Group in the Department of Earth Sciences. For further information please contact Prof. Dr. Whitney Behr (whitney.behr@erdw.ethz.ch).
This project is in the Structural Geology & Tectonics Group in the Department of Earth Sciences. For further information please contact Prof. Dr. Whitney Behr (whitney.behr@erdw.ethz.ch).