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

该奖项支持科罗拉多大学博尔德分校的查尔斯·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的合作研究。这项工作将涉及圣地亚哥附近上新世和第四纪早期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地段之间的分界线，在太平洋板块俯冲的角度、最近活动的安第斯火山的空间和岩石化学特征以及重大的地质和构造特征方面，这两个地段之间存在着重要的南北差异。这项研究将加深对南北段边界附近变化特征、安第斯岩浆成因和上新世火山作用期间具有重大经济意义的铜矿化之间的时间和空间关系的理解。除了科学成果之外，该项目还允许进行重大的国际交流，并对来自美国和智利的研究生进行培训。此外，它还为智利人提供了参加科罗拉多州高级分析化学的机会。这种培训和参与是发展中国家科学计划的一个重要特点。

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.