T33G:
Building the Andes: From Mantle Geodynamics to Surface Processes II


Session ID#: 10732

Session Description:
As the archetype of modern Cordilleran orogenic systems, the Andes define the highest and longest mountain belt associated with ocean-continent convergence.  Crustal thicknesses can reach up to 70 km, yet the timing and mechanisms of Andean deformation and uplift are debated.  The processes leading to upper plate shortening and crustal thickening in such Cordilleran orogenic systems remain a fundamental scientific issue.  Recent advances in Andean tectonics show important connections among mantle dynamics, lithospheric processes, crustal geology, surface geomorphology and climate.  This session aims at bringing together geologists and geodynamicists to combine geologic data with geodynamic models to explore the connections between deep Earth and the surface.  We invite contributions that evaluate various aspects of Andean geology, including, but not limited to, the records of deformation, uplift, erosion, sedimentation, and paleoenvironment along with contributions presenting geodynamic and tectonic models with emphasis on predictions for the dynamic response of the surface.
Primary Convener:  Barbara Carrapa, University of Arizona, Geosciences, Tucson, United States
Conveners:  Brian K Horton, University of Texas at Austin, Department of Geological Sciences and Institute for Geophysics, Austin, TX, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, United States
Chairs:  Barbara Carrapa, University of Arizona, Geosciences, Tucson, United States and Thorsten W Becker, University of Texas at Austin, Jackson School of Geosciences, Austin, United States
OSPA Liaison:  Barbara Carrapa, University of Arizona, Geosciences, Tucson, United States

Cross-Listed:
  • DI - Study of the Earth's Deep Interior
  • EP - Earth and Planetary Surface Processes
  • S - Seismology
  • V - Volcanology, Geochemistry and Petrology
Index Terms:

7270 Tomography [SEISMOLOGY]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8169 Sedimentary basin processes [TECTONOPHYSICS]
8175 Tectonics and landscape evolution [TECTONOPHYSICS]

Abstracts Submitted to this Session:

Recycling the Andes: Surface expressions of lithosphere removal (Invited) (73490)
Claire A Currie, University of Alberta, Department of Physics, Edmonton, AB, Canada, Huilin Wang, Huazhong University of Science and Technology, Wuhan, China and Peter G DeCelles, University of Arizona, Geosciences, Tucson, AZ, United States
Seismic imaging of the upper mantle beneath the northern Central Andean Plateau: Implications for surface topography (83977)
Kevin Michael Ward, University of Arizona, Tucson, AZ, United States, George Zandt, Retired, Washington, DC, United States, Susan L Beck, University of Arizona, Geosciences, Tucson, United States and Lara S Wagner, Carnegie Institution for Science Washington, Department of Terrestrial Magnetism, Washington, DC, United States
Geodynamic Drivers of Vertical Crustal Motion: Integrating Paleoaltimetry with Basin Development in the Central Andean Plateau of Southern Peru (78346)
Kurt E Sundell1, Joel E Saylor2, Thomas J Lapen3, Dustin Patrick Villarreal2, Richard H Styron4, Brian K Horton5,6 and Jose Cardenas7, (1)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (2)University of Houston, Department of Earth and Atmospheric Sciences, Houston, TX, United States, (3)University of Houston, Earth and Atmospheric Sciences, Houston, United States, (4)Earth Analysis, Los Gatos, CA, United States, (5)University of Texas at Austin, Department of Geological Sciences and Institute for Geophysics, Austin, TX, United States, (6)University of Texas at Austin, Department of Geological Sciences and Institute for Geophysics, Jackson School of Geosciences, Austin, TX, United States, (7)Universidad San Antonio Abad del Cusco, Departamento Académico de Geología, Cusco, Peru
The Bolivian Orocline and its implications for the origin of the central Andes (Invited) (70545)
Cesar Arriagada, University of Chile, Santiago, Chile
Melt production constrained by the topographic signature of the Altiplano-Puna Magma Body (75974)
David Milledge1, Kevin Michael Ward2, Shanaka L de Silva3, George Zandt2, Susan L Beck4 and Noah J Finnegan5, (1)University of California Santa Cruz, Santa Cruz, CA, United States, (2)University of Arizona, Tucson, AZ, United States, (3)Oregon State University, College of Earth, Ocean and Atmospheric Sciences, Corvallis, OR, United States, (4)University of Arizona, Geosciences, Tucson, United States, (5)University of California - Santa Cruz, Department of Earth and Planetary Sciences, Santa Cruz, CA, United States
High resolution crustal structure for the region between the Chilenia and Cuyania terrane above the Pampean flat slab of Argentina from local receiver function and petrological analyses (71944)
Jean-Baptiste Ammirati1,2, Patricia M Alvarado2, SOFIA BEATRIZ Perez Lujan1,2, Susan L Beck3, Ryan C Porter4 and George Zandt5, (1)CONICET, CIGEOBIO, Buenos Aires, Argentina, (2)CONICET and Universidad Nacional de San Juan, Departamento de Geofísica y Astronomía, FCEFN, San Juan, Argentina, (3)University of Arizona, Geosciences, Tucson, United States, (4)Northern Arizona University, School of Earth and Sustainability, Flagstaff, AZ, United States, (5)Retired, Washington, DC, United States
Uplift and Deformation of the Western Andean Slope, Northernmost Chile: Insights from Deformed Early Miocene Ignimbrites (62386)
Marit Elise van Zalinge1, R Stephen J Sparks2, Frances J Cooper3, Laura Evenstar1, Joe Aslin4 and Daniel James Condon5, (1)University of Bristol, Earth Sciences, Bristol, United Kingdom, (2)University of Bristol, Bristol, United Kingdom, (3)University of Bristol, Bristol, BS8, United Kingdom, (4)University of Liverpool, Bristol, United Kingdom, (5)NERC Isotope Geosciences Laboratory, Keyworth, United Kingdom
Mantle to Surface Fluid Transfer Above a Flat Slab Subduction Zone: Isotopic Evidence from Hot Springs in the Cordillera Blanca, Peru (74599)
Dennis L Newell1, Micah J Jessup2, David R Hilton3, Colin A Shaw4 and Cameron A Hughes2, (1)Utah State University, Department of Geosciences, Logan, United States, (2)University of Tennessee, Department of Earth and Planetary Sciences, Knoxville, TN, United States, (3)University of California San Diego, Earth Sciences, La Jolla, CA, United States, (4)Montana State University, Department of Earth Sciences, Bozeman, MT, United States

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