A Three-Dimensional Seismic Snapshot of Deformed Continental Lithosphere: Interpretation of the BANJO/SEDA Broadband Seismic Data

小行星9614250 这项研究涉及利用最近完成的BANJO/SEDA被动地震部署的现有数据，使用PASSCAL仪器，对中部安第斯山脉的大规模结构进行持续的地震学研究。 位于玻利维亚西部和北方智利的中部安第斯山脉是世界上最高和最宽的山脉带之一，局部海拔超过6000米，地壳厚度达75公里，变形延伸到内陆近1000公里。 该研究涉及使用接收器函数分析和来自下行板片中的事件的区域波形建模的组合来确定活动造山带的三维“地震快照”。 将未变形的查科与过度增厚的阿尔蒂普拉诺和科迪勒拉的地壳柱进行比较，以限制“异常”增厚地壳的起源。 预计这一对活跃的厚造山带的“地震快照”将成为检验超厚地壳中高压区域变质作用和深熔作用的想法和模型的基础。 ***

9614250 Beck This research ilvolves continued seismological study of the large- scale structure of the central Andes with existing data from the recently completed BANJO/SEDA passive seismic deployments using PASSCAL instrumentation. The central Andes, in western Bolivia and northern Chile, are among the highest and widest mountain belts in the world with elevations locally over 6000 m, crustal thicknesses up to 75 km, and deformation extending inland nearly 1000 km. The research involves use of a combination of receiver function analysis and regional waveform modeling from events in the down- going slab to determine a three-dimensional "seismic snapshot" of an active orogenic belt. Comparison of crustal columns of the un- deformed Chaco with the over-thickened Altiplano and Cordilleras will be used to constrain the origin of the "anomalous" thickened crust. It is expected that this "seismic snapshot" of an active, thick orogen will form the foundation on which to test ideas and models of high-pressure regional metamorphism and anatexis in over- thickened crust. ***