Dome Growth, Instability, and Pyroclastic Flow Generation at Decade Volcano Merapi, Indonesia

印度尼西亚默拉皮十年火山的穹顶生长、不稳定和火山碎屑流的产生

• 批准号: 9614622
• 负责人: Barry Voight
• 金额: $ 16.5万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614622&HistoricalAwards=false
• 关键词: Dome; Growth; Instability; Pyroclastic; Flow

9614622 Voight The Merapi volcano in Indonesia is currently undergoing an active phase that is characterized by growth of a lava dome. Previously, this stage of lava dome growth has been followed by a phase of instability and collapse that resulted in the generation of hazardous pyroclastic flows as exemplified in the recent (1994) lethal dome collapse. The primary aim of this study is to shed light on the processes of dome growth and instability, fragmentation and pyroclastic flow transportation and deposition using the current cycle of activity at Merapi as a natural laboratory. The research proposed will comprise the key US component to the cooperative international research program developed during the Merapi Decade Volcano International Workshop, held in Yogyakarta last October. The work plan involves looking at deformation of the lava dome and effusion rates with a network of geodetic survey stations and telemetered tiltmeters; positioning rain gauges that will test the impact of storm precipitation events on pyroclastic flow occurrences; and conducting stratigraphic and textural studies of the 1994 deposits to provide constraints on the interior of the previous dome.

9614622沃伊特印度尼西亚的默拉皮火山目前正处于活跃阶段，其特征是熔岩圆顶的增长。在此之前，这个阶段的熔岩穹丘的增长已经其次是一个阶段的不稳定和崩溃，导致危险的火山碎屑流的产生，在最近（1994年）致命的穹丘崩溃的例子。 这项研究的主要目的是阐明圆顶的增长和不稳定，破碎和火山碎屑流运输和沉积过程中使用的活动周期在默拉皮作为一个自然实验室。 拟议的研究将包括去年10月在日惹举行的默拉皮十年火山国际研讨会期间制定的国际合作研究计划的关键美国组成部分。这项工作计划包括利用大地测量站和遥测倾斜仪网络研究熔岩穹丘的变形和渗出率;放置雨量计，以测试暴雨事件对火山碎屑流的影响;对1994年的沉积物进行地层和结构研究，以确定以前穹丘内部的制约因素。