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

这项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 Calvache女士和其他科学家合作进行研究。研究人员建议研究哥伦比亚西北部加拉斯火山最近的火山锥的地质和火山学。此外，他们将编纂有关这座非常活跃的火山活动的历史数据，并将在目前活动增加的周期中继续监测山顶喷气孔的地球化学演变。这种监测在1989年2月取得了成果，异常脱气和地震活动明显增加，并开始了含岩屑灰烬的小型爆炸。目前，人们对加莱拉斯的持续活动越来越感到担忧。在加勒拉发现的最新锥的样本将在路易斯安那州立大学进行矿物学和地球化学变化的检查。将分析火山碎屑岩的粒度变化。根据目前对火山喷发气体的监测数据和对火山活动的历史记录的汇编，研究人员打算建立一个加拉斯火山活动的模型，作为评估未来火山喷发可能带来的潜在危险的基础。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可能产生很高的社会影响，该项目充分推进了发展中国家科学计划的目标。

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.