The Recent Geological Evolution and Current Activity of Galeras Volcano, Narino Colombia (South America)

哥伦比亚纳里诺加莱拉斯火山的近期地质演化和当前活动（南美洲）

• 批准号: 8914405
• 负责人: Stanley Williams
• 金额: $ 0.89万
• 依托单位: Louisiana State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-12-15 至 1991-05-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8914405&HistoricalAwards=false
• 关键词: Recent; Geological; Evolution; Current; Activity

This Science and Developing Countries award will support Professor Stanley Williams of Louisiana State University (LSU) at Baton Rouge in a research collaboration with Ms. Marta Lucia Calvache and other scientists at the Colombian Geological Survey (IN- GEOMINAS). The researchers propose to study the geology and volcanology of the most recent cone of the Galeras volcano, in northwestern Colombia. In addition, they will compile the historic data concerning activity of this very dynamic volcano, and they will continue monitoring of the geochemical evolution of the summit fumaroles during the present cycle of increased activity. This monitoring paid off when, in February 1989, anomalous degassing and seismic activity clearly increased and small lithic ash-bearing explosions began. At the present time, a growing sense of alarm surrounds the continuing activity of Galeras. Samples of the most recent cone developed at Galera will be examined at LSU for mineralogical and geochemical variations. Pyroclastic rocks will be analyzed for grain size variations. With data from present-day monitoring of fumarolic gases and compilation of the historic records of activity, the investigators intend to assemble a model of the activity of the Galeras volcano that could serve as a basis for an assessment of potential hazards associated with future eruptions. Because of the continued involvement and contribution of Colombian scientists and the possibility for the work under this award to have a high social impact, this project fully advances the objectives of the Science in Developing Countries Program.

这一科学与发展中国家奖将支持巴吞鲁日路易斯安那州立大学(LSU)的Stanley Williams教授与哥伦比亚地质调查局(IN-GEOMINAS)的Marta Lucia Calvishe女士和其他科学家进行研究合作。研究人员提议研究哥伦比亚西北部加雷拉斯火山最近的圆锥体的地质和火山学。此外，他们将汇编关于这座非常活跃的火山活动的历史数据，并将在当前活动增加的周期内继续监测顶峰喷气孔的地球化学演变。1989年2月，当异常排气和地震活动明显增加，含岩屑火山灰的小规模爆炸开始时，这种监测得到了回报。目前，越来越多的人对加雷拉斯的持续活动感到震惊。路易斯安那州立大学将对在加莱拉开发的最新圆锥体样本进行矿物学和地球化学变化检查。将分析火山碎屑岩的粒度变化。根据目前对瓦斯气体的监测和历史活动记录的汇编，调查人员打算建立一个加雷拉斯火山活动的模型，作为评估未来喷发的潜在危险的基础。由于哥伦比亚科学家的持续参与和贡献，以及该奖项下的工作有可能产生高度的社会影响，该项目充分促进了发展中国家科学计划的目标。