RAPID: RUI: Constraints on Fragmentation and Lava-Ice Contact From Ongoing 2010 Eyjafjallajokull Eruption, Southcentral Iceland

这次快速火山喷发是由&地球科学处的岩石地球化学项目和国际科学与工程办公室的欧洲和欧亚项目共同赞助的。从3月20日开始一直持续到现在，埃亚菲亚德拉冰盖中央火山经历了两种不同类型的喷发：东北翼碱性玄武岩的初始斯特龙博利期和夏威夷期喷发4月14日，在短暂的间歇后，火山在埃亚菲亚德拉冰盖（Eyjafjallajökull）的破火山口下重新爆发。山顶的喷发更具爆炸性，初步分析表明岩浆的成分更丰富。这一快速研究将在未来12个月内调查火山喷发的几个重要方面，这将为解释古代冰川火山沉积物提供更好的知识和方法，并为冰岛或北美西部未来的冰川火山喷发做好更好的准备。这是至少在过去200年来首次记录到的粗安岩和碱性玄武岩的冰川火山喷发，代表了一个独特的机会，以提高我们的冰川火山喷发过程的知识，这已成为关键的古气候代理连接更新世海洋和大陆气候信号。建议在未来12个月内调查火山喷发的几个重要方面，包括（1）Fimmvörthuháls熔岩相互作用的结构，（2）火山近端和远端位置火山灰的地层限制样本中记录的碎裂过程的变化，以及（3）火山喷发过程中岩浆化学的变化。 为了获得这项工作的最佳样品，至关重要的是调查高海拔熔岩雪接触，并收集火山灰样品沉积物或热液蚀变/palagonitized附近的通风口;改造的二次斜坡运输，将破坏地层/时间信息;季节性降雨侵蚀;或覆盖在2010-2011年冬季雪/冰。拟议的研究将使PI和一名迪金森学院的本科生与几位冰岛科学家（例如，Steinunn Hauksdöttir，Birgir Oskarsson）在追求研究目标。

This RAPID was co-sponsored by the Petrology & Geochemistry program of the Division of Earth Sciences (GEO) and the Europe and Eurasian Program in the Office of International Science and Engineering (OISE).Starting 20 March and continuing to the present, Eyjafjallajökull central volcano has experienced two different types of eruptions: initial strombolian and hawaiian eruptions of alkaline basalt from the northeastern flank (Fimmvörthuháls), producing lava-snow interactions, and starting 14 April, after a short temporal hiatus, the eruption was renewed beneath the summit caldera of the volcano (Eyjafjallajökull summit). The summit eruption has been much more explosive, and preliminary analyses show that the magma is more silicic in composition. This RAPID is to investigate several important aspects of the eruption during the next twelve months that will results in better knowledge and methodologies for interpreting ancient glaciovolcanic deposits, and also better prepare society for future glaciovolcanic eruptions from Iceland or from western North America.This is the first documented glaciovolcanic eruption of trachyandesite and alkaline basalt in at least the past two hundred years, and represents a unique opportunity to improve our knowledge of glaciovolcanic eruption processes, which have become critical paleo-climate proxies for linking Pleistocene oceanic and continental climate signals. It is proposed to investigate several important aspects of the eruption during the next twelve months, including (1) textures of lavas now interaction at Fimmvörthuháls, (2) changes in fragmentation processes as documented in stratigraphically constrained samples of ash at proximal and distal locations from the volcano, and (3) changes in magma chemistry during the course of the eruption. In order to obtain the best samples for this work, it is critical to investigate high elevation lava-snow contacts and collect ash samples before deposits are either hydrothermally altered/palagonitized near the vent; reworked by secondary slope transport that will destroy stratigraphic/temporal information; eroded by seasonal rain; or covered by snow/ice during winter 2010-2011. The proposed research will enable the PI and one Dickinson College undergraduate to partner and collaborate with several Icelandic scientists (e.g., Steinunn Hauksdöttir, Birgir Oskarsson) in the pursuit of the research goals.