U.S.-Mexico Collaborative Research: Study of Citlatepetl Volcano, Mexico

该奖项将支持密歇根理工大学的William Rose教授与墨西哥国立自治大学（UNAM）地质研究所的Zoltan de Cserna教授的一项研究合作。研究的目的是对西特拉特佩特尔火山后期喷发产物进行详细的研究，以描述其爆炸性、火山事件顺序和总体演化。这项工作将对大型冰川作用的亚热带层状火山进行现代表征，这将有助于重要的火山危害评估。对这些信息的分析将为第二个目标，即为西特拉特佩特尔地区建立具体的火山灾害规划提供重要支持。西特拉特佩特峰是墨西哥的最高峰（5675米），也是北美的第三高峰。它是跨墨西哥火山带最东端的火山，位于一个重要的正常断裂带上，该断裂带标志着墨西哥湾沿岸平原的中央高原。西特拉特佩特尔火山被提议进行火山学研究，因为人们认为它对周围地区有潜在的火山危害，而且目前可获得的地质或火山学信息有限。这样的火山是详细研究的一个重要目标，因为高冰川热带火山很少被彻底描述，正如1985年内华达德鲁伊斯火山（哥伦比亚）（Naranjo et al., 1986）的经验所表明的那样，人们对其了解不足，而且特别危险。

This award will support Professor William Rose of Michigan Technological University in a research collaboration with Professor Zoltan de Cserna of the Institute de Geologia of the National Autonomous University (UNAM) of Mexico. The objective of the research is to carry out a detailed study of the later eruptive products of Citlaltepetl volcano, in order to describe its explosivity, sequence of volcanic events and general evolution. The work will result in a modern characterization of a large glaciated sub-tropical strato- volcano, which will facilitate important volcanic hazard evaluations. The analysis of this information will provide important support for the second goal, the establishment of specific volcanic hazard planning for the Citlaltepetl region. Citlaltepetl is the highest peak in Mexico (5675m) and the third highest peak in North America. It is the easternmost volcano of the Transmexican Volcanic Belt, located on an important normal fault zone that marks the central plateau from the Mexican Gulf coastal plains. Citlaltepetl volcano has been proposed for volcanological research because of the perceived potential volcanic hazards for the surrounding areas and because there is only a limited amount of geological or volcanological information available at present. Such a volcano is an important target for detailed study because high, glaciated tropical volcanoes have rarely been thoroughly described and, as the experience at Nevado de Ruiz volcano (colombia) (Naranjo et al., 1986) in 1985 shows, are inadequately understood and particularly dangerous.