Tectonic Controls on Magmatism and Deformation in the Cordillera Blanca, Peru: Toward a Definitive Model for Andean-Type Magmatic Arcs

小行星9802825 纳斯卡板块俯冲到南美洲之下导致了安第斯大陆岩浆弧的产生，这通常是此类弧的典型地点。 然而，板块相对运动，岩浆作用和变形之间的相互作用仍然知之甚少。 该项目利用秘鲁中北部一个非常年轻和暴露良好的岩基，以确定各种所需参数，如年龄、侵位深度、围岩和顶板岩石以及边缘剪切带。 将把结果与关于岩基的大量数据结合起来，目的是制定一个在张扭弧环境中岩基就位的一般模型。

9802825 McNulty Subduction of the Nazca plate beneath South America has resulted in generation of the Andean continental magmatic arc, which often serves as the type locality of such arcs. However the interaction between plate relative motions, magmatic processes, and deformation are still poorly understood. This project takes advantage of a very young and well-exposed batholith in north-central Peru to address a variety of needed parameters such as age, depth of emplacement, wall and roof rocks and a marginal shear zone. Results will be integrated with extensive data on the batholith with the intent of formulating a general model for batholith emplacement in transtensional arc settings.