《地空学术讲座 第476期》Germán Prieto 副教授：加勒比板块的破裂：巴拿马北缘下方的俯冲启动
- 题目: 加勒比板块的破裂：巴拿马北缘下方的俯冲启动
- 主讲人：Germán Prieto 副教授 @ 哥伦比亚国立大学
- 时间：2026年3月17日 16:00-17:30
- 地点：理学院E3153报告厅
主讲人简介
Professor German A. Prieto is an Associate Professor in the Department of Geosciences at the Universidad Nacional de Colombia. His research focuses on earthquake source physics and the ground motions observed at Earth's surface. He earned his PhD in Earth Sciences from UC San Diego, completed a Thompson Postdoctoral Fellowship at Stanford University, and previously served on the faculty at MIT. His work develops advanced seismological analysis methods to study earthquake source processes, Earth structure, and their effects on ground motions, including contributions to regional tomography, wave propagation and scattering, and ambient-noiseseismology. He is curenty an Editor for Geophysical Research Letters and has held various editorial and commitee roles within AGU. His honors include the Keiti Aki Young Scientist Award and an Editors Citation for Excellence in Refereeing from JGR: Solid Earth.
讲座简介
The initiation of subduction zones is a poorly understood but core plate tectonic process. One unknown is how and under what conditions previously contiguous plates break. Here we present a comprehensive assessment of the Northern Panama Subduction Zone (NPSZ) where the Caribbean Plate is subducting to the SSW beneath Panama. Because the Panama arc was built onto the Caribbean Plate, the existence of the NPSZ means that the Caribbean Plate must have broken. The significant crustal thickness (~20 km) and age (>90 Ma) of the Caribbean Plate make the NPSZ the closest analog to passive margin failure known. We use evidence from the 25 May 2023 Mw 6.3 megathrust earthquake northeast of Panama included in a newly refined earthquake catalog to identify the geometry of the downgoing plate. We combine these with plate reconstructions to study the initiation of the NPSZ, its subsequent evolution, and its tectonic implications.
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