New and Evolving Seismic Images of the Central Andes and Subducting Nazca Slab - 20 Years of Portable Seismology Results

Explore a comprehensive lecture on the seismic imaging of the Central Andes and subducting Nazca Slab, presented at the 2014 AGU Fall Meeting. Delve into 20 years of portable seismology results, covering topics from the BANJO project in 1994 to the PULSE project in 2014. Examine teleseismic tomography techniques used to image the subduction zone, and investigate earthquake locations and slab folding. Gain insights into Pampean and Peru flat slab subduction, hydration and dehydration processes in the slab, and new slab contours. Study the depth to Moho in the North Central Andes and analyze the Altiplano Puna Volcanic Complex. Discover the potential formation of a batholith in the Central Andes and explore two causes of lithospheric removal. This 51-minute Gutenberg Lecture, presented by S. L. Beck from the University of Arizona, offers a deep dive into the evolving understanding of the complex geological structures in the Central Andes region.

Intro
Why Study the Andes and South
From BANJO (1994) to PULSE (2014)
Teleseismic Tomography to Image the Subduction Zone
Teleseismic P-wave Tomography
Earthquakes and Slab Folding
Pampean Flat Slab Subduction
Earthquake Locations
Hydration and Dehydration in the Slab
Imaging the Argentina Flat Slab
Peru Flat Slab
CCP Receiver Functions
New Slab Contours
Depth to Moho - North Central Andes
Flat Slab Subduction Summary
ANT Shear Wave
Joint Receiver Function - Surface Wave Dispersion Inversion
Altiplano Puna Volcanic Complex
3D view of the Altiplano Puna Magma Body
Is a Batholith Forming in the C. Andes?
Two Causes of Lithospheric Removal
Acknowledgements