Project 586Y - Geodynamic Processes in the Andes 32°-34°S
This is a multi-disciplinary project to evaluate the interplay between constructive deep mechanisms building and uplifting the Andes, and destructive ones that shape the landscape. This project is devoted to fulfilling three specific objectives. Firstly, to understand the mechanisms of interplay between deep and surface processes in the development of the Andean Cordillera between 32-34ºS, over short (101a-103) to long (105-106) timescales. In particular, we will address the following questions:
- What is the nature of the interaction between tectonic and surface processes in this sector of the Andes?
- In particular, which are their feedback mechanisms?
- What are the spatial and temporal variations in continental lithospheric deformation?
- What control does the geometry of the subducting slab exert over the timing and style of deformation in the South American plate?
- How is deformation accommodated in space and time?
- How did the uplift and denudation of the western and eastern Principal Cordillera and the Frontal Cordillera during the Andean orogeny between 32º-34ºS take place?
- Are there differences between the flat-slab (32º-33ºS) and the transitional (33º-34ºS) segments in this respect?
Secondly, and complementary to the study of feedback mechanisms between tectonics and surface processes, is the study of megalandslides.
- Can we interpret mega-landslides in term of tectonic or climatic forcing?
- What is the relation between mega-landslides and fault slip rate?
- How does the rate of river incision affect landsliding?
Finally, the long-term goal will be to develop a multidisciplinary group for studying geodynamic processes in the southern Central Andes of Chile and Argentina. This project will promote the interaction between Chilean, Argentine and American young researchers who are actively studying the southern Central Andes from different geologic perspectives. This project is, therefore, meant as a platform for idea exchanges between the different groups and across borders.
To address these questions we propose to bring together studies focusing on a number of subdisciplines of the earth sciences, tectonics, petrology, geophysics, geochemistry, structural geology, geomorphology, engineering geology, stratigraphy and sedimentology. We will integrate five of our current Andean projects which combined will allow for an integrated view of the interplay between superficial and deep processes.