Mechanism of Emplacement of Large Volume Pyroclastic Flows: ITO Ignimbrite, Japan
Mechanism of Emplacement of Large Volume Pyroclastic Flows: ITO Ignimbrite, Japan
批准号:
9205022
负责人:
Richard Fisher
金额:
$0.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1992
资助国家:
美国
项目状态:
已结题
起止时间:
1992-07-01 至 1995-12-31
中文摘要
这个项目是研究火山碎屑流如何穿越高山(1000m):是(1)膨胀流并分离成不同的部分,还是(2)非膨胀流,动量大,像在平地上一样在山上移动。了解流动机制如何影响跳动长度和流动可以超越的高度,对危害评估具有重要意义。伊藤褐煤是理想的研究对象:它(1)跨越高山,(2)暴露良好且分布广泛,(3)进入容易。流动方向差异是识别不同流动模型的关键,将通过标准地质方法(相分析、最大碎片尺寸分布、结构分析)和磁化率的各向异性来测量。研究结果不仅可以为火山碎屑流运动提供更好的科学认识,而且可以引发与拯救人类生命直接相关的行政行动。
英文摘要
This project is to study how pyroclastic flows cross high mountains (1000m): whether (1) they are expanded flows and segregate into different parts, or (2) non-expanded flows with high momentum that move over mountains as they do on flat ground. Understanding how flow mechanisms influence runout length and elevations a flow can surmount has major consequences for hazard assessments. The Ito ignimbrite is ideal to study: it (1) crosses high mountains, (2) is well exposed and extensive, and (3) access is easy. Flow direction differences, critical for recognition of the different flow models, will be measured by standard geologic methods (facies analysis, distribution of maximum fragment sizes, fabric analysis) and by anisotropy of magnetic susceptibility. Results should not only provide a better scientific understanding of pyroclastic flow movement, but could also trigger administrative action directly related to saving human lives.
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批准号:2309031
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批准号:9105456
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Debris Avalanche and Blast Eruption, Raung Volcano, Indonesia
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财政年份:1991
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U.S.-Italy Cooperative Research: The Campanian Ignimbrite Eruption and Emplacement
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财政年份:1990
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负责人:Richard Fisher
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依托单位:
Facies Architecture and Depositional Processes Resulting from Intra-Basinal Maar Volcanism, Hopi Buttes, NortheasternArizona
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批准号:8816281
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1989
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资助金额:$5.0万
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Scientific Visit to Plan Cooperative Research on Tectonics and Volcanology in Northwestern Argentina
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财政年份:1986
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Blast Flow Deposits: Mount St. Helens
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批准号:8416582
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1985
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负责人:Richard Fisher
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依托单位:
Blast Pyroclastic-Flow Deposits, Mount St. Helens, Washington
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批准号:8205868
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1982
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负责人:Richard Fisher
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依托单位:
Ground Surge, Pyroclastic Flow and Eruption Column Collapse
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批准号:7919696
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1980
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负责人:Richard Fisher
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依托单位:
Penrose Conference on the Geology of Subaqueous Volcanic Rocks, Santa Barbara, California, November 27 - December 01 1977
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批准号:7723532
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1977
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负责人:Richard Fisher
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依托单位:
Mechanisms of Flow and Deposition From Ash Clouds and Ash Flows
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批准号:7714489
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1977
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负责人:Richard Fisher
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依托单位:
Subaqueous Volcanic Rocks, Obispo Formation, California
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批准号:7517381
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依托单位:
海外基金