Geochemical Evolution of Convergent Margins from Asthenosphere to Atmosphere

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Session ID#: 21897

Session Description:
The importance of links between processes in the mantle, crust, hydrosphere, and atmosphere at convergent margins is increasingly clear, but the mechanisms, timescales, and even directionality of these connections remain poorly understood. These interactions influence the growth, recycling, and destruction of the lithosphere; induce rapid shifts in surface elevation and produce high topography that can affect atmospheric circulation; and drive feedbacks between precipitation, rock deformation, uplift, basin development, landscape evolution, and biologic change. Furthermore, convergent margins generate the planet’s largest earthquakes and modulate greenhouse-gas budgets via volcanism and chemical weathering. In this session, we aim to bridge temporal, spatial, and disciplinary gaps between geochemical studies of Andean-type margins. We invite contributions that place the geochemistry of modern and ancient convergent margins within the context of these interactions. We particularly welcome multi-method approaches that include geochronology, thermochronology, cosmogenic nuclide-dating, stable isotope measurements, leaf-wax lipid-biomarkers, or other biological proxies.
Primary Convener:  Kendra E Murray, University of Michigan Ann Arbor, Ann Arbor, MI, United States
Conveners:  Alexander Rohrmann, Oregon State University, Corvallis, OR, United States and Mauricio Ibañez-Mejia, University of Rochester, Rochester, NY, United States
Co-Organized with:
Tectonophysics, and Volcanology, Geochemistry and Petrology

  • B - Biogeosciences
  • EP - Earth and Planetary Surface Processes
  • V - Volcanology, Geochemistry and Petrology

Abstracts Submitted to this Session:

Lu Zhang and Changhai Xu, Tongji University, Shanghai, China
Peter Dominic Clift, Louisiana State University, Geology and Geophysics, Baton Rouge, LA, United States

See more of: Tectonophysics