Distribution and Geometric Parameters of Volcanic Debris Avalanche Deposits
Distribution and Geometric Parameters of Volcanic Debris Avalanche Deposits
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火山碎屑崩落沉积物分布及几何参数
DOI：
10.1007/978-3-030-57411-6_4
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发表时间：
2020
影响因子：
2.9
通讯作者：
B. Bernard
中科院分区：
文献类型：
--
作者：
A. Dufresne;L. Siebert;B. Bernard
一个新的火山碎屑雪崩沉积物数据库（VDADs）来自52个国家的594座火山，基于已公布的清单和我们自己未公布的数据。这项工作概述了vdad在世界各地的分布，它们的大小，复发间隔，以及它们的控制参数的定量表征。已登记的矿床中约有50%位于日本、美洲和俄罗斯。在单个火山大厦中，多次横向崩塌是常见的，在一些火山中会发生十几次或更多的事件。火山碎屑雪崩沉积在形状、沉积形态和结构上与非火山岩雪崩相似。然而，对矿床参数体积、面积、落差高度和跳动长度的对比分析表明，它们的主要区别在于ra通常可以达到的最大体积。这主要是由于源疤痕几何形状的差异。在相同的落差高度下，vda可以产生更大的体积，因为它们的伤痕更深，更像碗状，并且沿着更长的斜坡延伸，而不是岩石斜坡。虽然新的数据库仍然不完整，但这一汇编显示了今后分析的巨大潜力，并强调了加强这类清单的重要性，要有更多经过充分研究的案例，以便进行健全的科学研究和危害评估。
A new database of volcanic debris avalanche deposits (VDADs) from 594 volcanoes in 52 countries has been compiled based on published inventories and our own unpublished data. This work presents an overview of the distribution of VDADs around the world, their sizes, recurrence intervals, and a quantitative characterization of their controlling parameters. Around 50% of the catalogued deposits are located in Japan, the Americas and Russia. Multiple lateral collapses are common at a single volcanic edifice, with a dozen or more events at some volcanoes. The deposits of volcanic debris avalanches are similar to those of non-volcanic rock avalanches (RAs) in terms of shape, deposit morphology and texture. A comparative analysis of the deposit parameters volume, area, drop height and runout length, however, shows that their main difference lies in the maximum volume RAs can typically reach. This is mainly due to differences in source scar geometry. At the same drop height, VDAs can produce larger volumes because their scars are deeper-seated, more bowl-shaped, and extend along longer slopes than is common for rock slopes. Although the new database is still incomplete, this compilation shows great potential for future analyses and emphasizes the importance of strengthening such inventories with more well-studied cases for sound scientific studies and hazard assessments.
西非佛得角群岛侧翼塌陷和大规模山体滑坡
影响因子：
3.7
作者：
Masson;T.P LeBas;I. Grevemeyer;W. Weinrebe
通讯作者：
W. Weinrebe