Tectonic Erosion Along the Southern Chile Margin

收敛的利润已被证明是两种类型。 增生边缘反映了沉积物质的增加 在大洋俯冲过程中， 地壳。 侵蚀边缘反映了地壳的构造剥离 物质及其通过俯冲洋向深处的输送 地壳。 了解这两种类型的利润率的原因是 决定全球沉积物质平衡的关键元素 地壳和地幔之间的循环，并可能揭示了 形成地震沿着汇聚的特征和过程 利润率 本裁定书将用于审查智利差值， 一个强烈侵蚀的地区，由一个 活跃的扩散中心 具体来说，多道地震 反射数据将从一个未受干扰的部分进行处理， 利润率和比较，详细的分析数据，从一个高度 侵蚀断面 这些数据集的比较将提供一个 独特的图片的时间变化的边缘结构和侵蚀。

Convergent margins have been shown to be of two types. Accretionary margins reflect the addition of sedimentary material to an overriding crustal plate during underthrusting of oceanic crust. Erosional margins reflect tectonic stripping of crustal material and its transport to depth by the underthrusting ocean crust. Understanding the reasons for these two types of margins is critical in determining global sedimentary mass balances, element cycling between the crust and mantle, and may shed light on the features and processes which create earthquakes along convergent margins. The present award will support examination of the Chile margin, a region of intense erosion produced by the underthrusting of an active spreading center. Specifically, multi-channel seismic reflection data will be processed from an undisturbed section of the margin and compared to detailed analysis of data from a highly eroded section. Comparison of these data sets will provide a unique picture of temporal changes in margin structure and erosion.