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UID:seminar-14335@epss.ucla.edu
DTSTAMP:20260411T025734Z
DTSTART:20260113T033000Z
DTEND:20260113T043000Z
SUMMARY:Tectonic and climate controls on the growth of the Andes: linking data and models
LOCATION:3853 Slichter Hall
DESCRIPTION:Date: 2026-01-13 00:00:00

Time: 3:30–4:30 PM

Location: 3853 Slichter Hall

Presented By:
Dr. Veleda Muller - University of Arizona

Abstract:


In this talk I am going to explore the interplay between tectonic and surface processes in shaping Cordilleran-type orogenic systems\, having the Central Andes as the main study case. The Escoipe Canyon in NW Argentina cross cuts the fold-and-thrust belt of the Eastern Cordillera\, which makes the transition from the Puna Plateau to the modern foreland region. A new dataset of multiple low-temperature thermochronometers records the history of orogenic building from rifting to foreland basin\, and ultimately the thrust belt forming the present-day orographic barrier of the Central Andes. The apatite (U-Th)/He data\, however\, dates the last 10 myr of history after the main episode of shortening\, and shows a westward trend of younger cooling ages\, opposite to the regional cooling trend in the thrust belt. I will explore a hypothesis regarding climate and surface processes controlling rock exhumation in the canyon\, and the impacts on orogenic evolution. Additionally to this data-driven study case\, I will show some effects of orography in Cordilleran-type systems in the lithospheric scale using geodynamic models\, and demonstrate that surface processes might affect strain distribution and lithospheric removal processes.
URL:https://epss.ucla.edu/tectonic-and-climate-controls-on-the-growth-of-the-andes-linking-data-and-models/
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