Directed Blast - Debris Avalanche Relations at Bezymianny Volcano, Kamchatka

这项工作的长期目标是提高我们对大规模火山大厦崩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大厦破坏。大厦的迅速倒塌可能反过来引发破坏性爆炸事件，包括所谓的“定向爆炸”现象。这个项目旨在理解这些交互过程。真正定向爆炸的最好例子发生在圣海伦火山（1980年），人们对它进行了彻底的研究，而对贝兹米尼火山（1956年）的研究却很少。因此，本文拟重点研究贝兹米尼爆破沉积及其与引发爆破过程的岩屑雪崩的关系。拟议的研究建立在Belousov和Belousov以及合作科学家最近在bezzmianny进行的初步实地研究的基础上，这些研究表明，Bezymianny的爆炸矿床与已知的火山碎屑涌动矿床不相似，只有圣海伦斯火山例外。野外工作将包括地层关系研究、制图、取样、沉积学和床型研究的标准技术。样品将进行粒度分析，并使用SEM， XRD和微探针进行研究。从炭化的木片中建立温度数据。颗粒的粒度分布、形状和组成，结合野外观测，将为火山喷发过程的解释提供依据。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.