Directed Blast - Debris Avalanche Relations at Bezymianny Volcano, Kamchatka

9628413沃伊特这项工作的广泛的长期目标是提高我们对大规模火山建筑物坍塌和相关爆炸性喷发中岩浆相互作用的理解。 岩浆侵入可能引发大规模的建筑物破坏。 建筑物的迅速倒塌反过来又可能引发破坏性的爆炸事件，包括被称为“定向爆炸”的现象。 本项目旨在了解这些互动过程。 真正定向爆炸的最好例子是在圣海伦斯火山（1980年）和贝济米安尼火山（1956年）发现的，前者已被彻底研究过，后者几乎没有被研究过。 因此，拟议的研究重点是Bezymianny爆炸存款，及其与触发爆炸过程的碎片雪崩的关系。 拟议的研究建立在Belousov和Belousov以及合作科学家最近在Bezymianny进行的初步实地研究的基础上，这些研究表明Bezymianny爆炸沉积物与已知的火山碎屑浪涌沉积物不相似，唯一的例外是圣海伦斯山。 野外工作将包括研究地层关系、绘图、取样、沉积学和研究床形的标准技术。 将对样品进行粒度分析，并使用SEM、XRD和微探针进行研究。 温度数据将由原木碎片建立。 颗粒的粒度分布、形状和成分，以及现场观测，将为解释喷发过程提供依据。 这项研究预计将对火山灾害产生重大影响。

9628413 Voight The broad long-term objective of this work is to improve our understanding of magmatic interactions in large-scale volcanic edifices collapse and associated explosive eruptions. magma intrusion may trigger large-scale edifice failure. Rapid edifice failure may in turn provoke destructive explosive events, including the phenomenon known as the 'directed blast'. This project aims at understanding these interactive processes. The best examples of true directed blasts are found at Mount St. Helens (1980), which has been thoroughly studied, and Bezymianny Volcano (1956), which has been little studied. Therefore the proposed research focuses on the Bezymianny blast deposit, and its relation to the debris avalanche that triggered the blast process. The proposed research builds on recent preliminary field studies at Bezymianny by Belousov and Belousov, and collaborating scientists, which suggest that the Bezymianny blast deposits are not analogous with known pyroclastic surge deposits, with the sole exception of Mount St. Helens. Field work will comprise standard techniques of study of stratigraphic relationships, mapping, sampling, sedimentology, and study of bed forms. Samples will be subject to granulometric analyses and studied with SEM, XRD and microprobe. Temperature data will be established from carbonized wood fragments. Grain size distribution, shapes and compositions of particles, together with field observations, will provide the basis for interpretation of eruption processes. The study is expected to have significant implications on volcanic hazards.