Collaborative Study of Pliocene Andean Volcanism in the Vicinity of Santiago, Chile

该奖项支持由博尔德科罗拉多大学的查尔斯·斯特恩和智利圣地亚哥大学的迈克尔·多布斯在早期火山岩地球化学方面进行的合作研究。这项工作将涉及圣地亚哥附近上新世和早第四纪安第斯火山岩的野外测绘和化学分析。这些岩石形成于安第斯山脉两个不同板块之间的边界，在这两个板块之间，太平洋板块俯冲角度、安第斯火山近期活动的空间和石油化学特征以及重要的地质和构造特征都存在重要的南北差异。该研究将完善对南北段边界附近变化特征之间时空关系的理解，安第斯岩浆成因和上新世火山活动期间经济上重要的铜矿成矿作用。除了科学成果之外，该项目还允许进行重要的国际交流，并培训来自美国和智利的研究生。此外，它还为智利人参与科罗拉多州的先进分析化学提供了机会。这种培训和参与是“科学在发展中国家”项目的一个重要特征。

This award supports cooperative research in the geochemistry of early volcanic rock to be conducted by Charles Stern of the University of Colorado at Boulder and Michael Dobbs of the University of Santiago, Chile. The work will involve field mapping and chemical analysis of Pliocene and early Quaternary Andean volcanic rocks near Santiago. These rocks were formed at the boundary between two distinct segments of the Andes across which important north to south differences occur in the angle of Pacific plate subduction, in spatial and petrochemical characteristics of recently active Andean volcanos and in significant geologic and tectonic features. The study will refine the understanding of the temporal and spatial relationships between the changing features near the north-south segment boundary, of Andean magma genesis and of the economically significant copper mineralization developed during Pliocene volcanism. In addition to the scientific results, this project allows for a significant international interchange and the training of graduate students from both the United States and from Chile. Also, it provides an opportunity for participation of the Chileans in the advanced analytical chemistry in Colorado. This kind of training and participation is an important feature of the Science in Developing Countries program.