Effects of Magmatic Underplating on the Lower Crust: A Field Study of the Ivrea-Verbano Zone, Northern Italy

岩浆对陆壳底侵作用的概念， 是构造学的基础，但很难评估，因为 是迄今为止少有的地质学证据 这个项目是 一个基于实地的研究，暴露区的可能地壳下， 电镀在意大利阿尔卑斯山北方的伊夫雷亚-韦尔巴诺地区。 该区域提供了一个特殊的横截面， 大陆地壳岩石广泛侵入镁铁质火成岩 岩石化学分析方法 将绘制一幅新的1：25，000地质图， Ivrea-Verbano带，并将进行结构和运动学研究。 同时进行。 与意大利的密切合作 将始终保留在该地区工作的地质学家。 的 野外测绘将形成未来详细岩石学的基础， 地球化学和地质年代学研究，旨在了解 底镀区的物理和化学演化。 的 该研究的结果将允许开发通用模型， 这将大大提高我们对起源的理解， 陆壳底侵构造演化 活跃区域。

The concept of underplating of continental crust by magma is fundamental to tectonics but is difficult to evaluate because there is as yet little documented geological evidence. This project is a field-based study of an exposed zone of probable crustal under- plating in the Ivrea-Verbano zone of the northern Italian Alps. This zone provides an exceptional cross-section of lower continental crustal rocks extensively intruded by mafic igneous rocks. A new 1:25,000 geologic map will be prepared across the Ivrea-Verbano zone, and structural and kinematic studies will be undertaken at the same time. Close collaboration with Italian geologists working in the area will be maintained throughout. The field mapping will form a basis for future detailed petrological, geochemical, and geochronological studies aimed at understanding the physical and chemical evolution of the underplated region. The results of this study will allow development of a general model, for and will considerably improve our understanding of, the origin and evolution of underplated continental crust in tectonically active regions.