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 Voight印度尼西亚的默拉皮火山目前正在经历一个活跃的阶段，其特征是熔岩圆顶的生长。以前，熔岩圆顶生长的这一阶段之后是不稳定和崩溃的阶段，导致了危险的火山碎屑流的产生，如最近（1994年）致命的圆顶崩溃所示。 这项研究的主要目的是阐明圆顶生长和不稳定性，碎片化和火山碎屑流的运输和沉积，使用梅拉皮的当前活动周期作为天然实验室。 提出的研究将构成去年10月在约哥卡塔举行的梅拉皮十年中开发的合作国际研究计划的关键组成部分。该工作计划涉及通过大地调查站和遥测倾斜度网络的网络来研究熔岩穹顶和积液率的变形；定位雨量测量表将测试风暴降水事件对火山碎屑流的影响；并进行1994年沉积物的地层和纹理研究，以在上一个圆顶的内部提供约束。