Collaborative Research: Seismic Studies of the Andean Lithosphere

安第斯地球物理学的一个中心问题仍然是对覆岩板块的准确描述，特别是它的组成、变形方式和热状态。该合作方案是对数字阵列数据和宽带数据进行地震分析，以成像安第斯山脉两个不同省份的地壳/地幔楔：秘鲁中部的平坦俯冲区域，以及包括安第斯山脉最北端的西阶俯冲复杂区域。我们的目标是绘制出足够详细和精确的地震构造图，以便将结果应用于理解塑造安第斯山脉的动力和岩浆过程。通过在一项研究中结合这两个明显不同的省份，我们还努力解决安第斯弧段之间深层结构的根本差异。

A central problem in Andean geophysics remains the accurate characterization of the overriding plate, specifically its composition, style of deformation, and thermal state. This collaborative proposal is for seismic analysis of digital array data and broadband data to image that crust/mantle wedge in two diverse Andean provinces: the region of flat subduction beneath central Peru, and the region of the westward-stepping subduction complex that comprises the northernmost Andes. Our objective is to map seismic structures in sufficient detail and accuracy that the results may be applied to understanding the dynamical and magmatic processes that shape the Andes. By combining these two markedly different provinces in a single study we endeavor also to resolve fundamental differences in deep structure between segments of the Andean arc.