The Behavior of Pyroclastic Flows that Enter the Sea

9316254凯里，这项研究的目的是通过对1883年喀拉喀托火山喷发的海底火山碎屑流沉积的观察，以及为研究火山碎屑流/水相互作用的某些方面而设计的实验室实验，来探索流入海洋的水流的行为。以前对克拉喀托海底沉积的研究表明，热火山碎屑流沉积在浅水(40米)。新的研究将检查在深水(100米深)中沉积的沉积物。这些矿床的样品将被用来建立浅水向深水过渡的沉积相模式，并评估侵位温度。实验室实验将检查1)排放到密度相反的环境流体中的颗粒重力流的行为，以及2)热火山颗粒和水的相互作用。这些实验应该能提供对热流进入海洋时可能发生的不同类型混合行为的洞察。

9316254 Carey The objective of this study is to explore the behavior of flows that enter the sea by using observations on submarine pyroclastic flow deposits from the 1883 eruption of Krakatau volcano and laboratory experiments designed to examine certain aspects of pyroclastic flow/water interactions. Previous work on the submarine deposits of Krakatau have demonstrated the deposition of hot pyroclastic flows in shallow water (40 m). New studies will examine the deposits that were laid down in deep water (100 m depth). Samples from these deposits will be used to construct a depositional facies model for the transition from shallow to deep water, and to assess the temperature of emplacement. Laboratory experiments will examine 1) the behavior of particle-laden gravity currents discharged into a tank of ambient fluid of contrasting density and 2) the interactions of hot volcanic particles and water. These experiments should provide insights into the different types of mixing behavior that are likely to take place when hot flows enter the ocean.