Flood Basalt Eruption Mechanisms and Atmospheric Impact

9316881 Self我们认为，大体积的玄武岩熔岩，如CRB熔岩，通过岩浆的半连续输出和热效率就位实现了它们的巨大流动长度，这使得熔岩可以传播到地形允许的最远的地方（在某些情况下为500公里）。所进行的研究一致认为，哥伦比亚河省的洪水玄武岩熔岩是作为热效率高的大规模pahohoe片流喷发的；任何一个流场都是在相当长的时间跨度（几个月到几年！）内逐渐增长的。我们建议继续研究洪水玄武岩熔岩的就位机制，目的是完善我们目前对它们喷发速度的看法，以及洪水玄武岩喷发或一系列喷发对大气的可能影响。特别是，这笔资助将使Sara Finnemore能够完成她在这个项目上的博士学位。

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.