Flood Basalt Eruption Mechanisms and Atmospheric Impact

9316881自身我们认为，大量的玄武岩熔岩，如CRB熔岩，通过半连续的岩浆输出和有效的热侵位实现了其巨大的流动长度，这使得熔岩能够在地形允许的范围内扩散到最远的地方(在某些情况下为500公里)。研究的共识是，哥伦比亚河省的洪水玄武岩熔岩是以热效率高的大规模泡状席状流的形式喷发的；任何一个流场在相当长的时间跨度内(几个月到几年！)都是逐渐增长的。我们建议继续研究洪水玄武岩熔岩的侵位机制，目的是完善我们目前关于它们喷发速度的想法，以及洪水玄武岩喷发或一系列喷发对大气可能产生的影响。特别是，这笔赠款将使Sara Finnemore能够完成她在这个项目上的博士工作。

9316881 Self We propose that large volume basaltic lavas, such as the CRB lavas, achieved their great flow length by semi-continuous output of magma and thermally efficient emplacement, which allowed lavas to spread as far as topography would permit (in some cases 500 km). The consensus of research undertaken is that flood basalt lavas of the Columbia River province were erupted as thermally efficient, large-scale pahoehoe sheet flows; any one flow field grew progressively over a considerable time-span (months to years!). We propose continued investigation into emplacement mechanisms of flood basalt lavas with the aim of refining our current ideas on the rate at which they were erupted, and what the possible impact of a flood basalt eruption, or series of eruptions, was on the atmosphere. In particular, this grant will enable Sara Finnemore to complete her PhD work on this project.