Emplacement and Solidification of Basaltic Lava Flows

9508144 Cashman对来自莫纳罗亚火山的两个充气片状流和俄勒冈州中部两个充气片状流的气泡结构进行详细测量，将允许测试Cashman等人的模型的适用性。(回顾)到通常由基拉韦厄火山产生的更大流量的水流。这种解释侵位过程动力学的目标与以前的研究截然不同，以前的研究认为流泡的发展是一个静态的过程。这项工作将为解决更神秘的水流，如洪水玄武岩的侵位奠定基础。将使用完整的玻璃地质温度计确定这两种流动的温度随运输距离的变化，目的是用玄武岩喷发速率(从而确定流动侵位方式)来校准温度损失。将对玻璃地温计进行实验校准，以定量测定银杏流在运输和就位过程中的温度损失。最后，玄武岩流动侵位前和侵位后的冷却速率都保存在玻璃边缘和凝固流动内部的微晶岩群中。通过实验量化观察到的冷却速度与晶体数密度之间的定性关系，将为确定凝固玄武岩流动中的冷却速度分布提供新的工具。

9508144 Cashman Detailed measurements of the vesicle structure of two inflated sheet flows from Mauna Loa volcano and two inflated sheet flows in central Oregon will allow testing of the applicability of the model of Cashman et al. (in review) to flows of larger volume that typically produced by Kilauea Volcano. This goal of interpreting the dynamics of the emplacement process is distinctly different from previous studies that have viewed the development of flow vesicularity as a static process. This work will lay the foundation for addressing the emplacement of more enigmatic flows, such as flood basalts. Temperature changes with transport distance will be determined for both of these flows using the completed glass geothermometer with the goal of calibrating temperature loss with basalt eruption rate (and thus flow emplacement style). A glass geothermometer will be calibrated experimentally for quantitative determination of temperature loss during transport and emplacement of the Gingko flow. Finally, both pre- and post-emplacement cooling rates of basalt flows are preserved in the microlite population of both glassy selvages and solidified flow interiors. Experimental quantification of observed qualitative relationships between cooling rate and crystal number density will provide a new tool for determining cooling rate distributions in solidified basalt flows.