RAPID - High precision radiometric dating of Axial Seamount 2015 eruption products with 210Po-210Pb

对于海底火山，我们对火山内部活动、岩浆上升速度以及导致火山喷发的一系列事件的了解仍然是初级的。2015年春天，就在海洋观测倡议（OOI）安装之后，一个新的；同意;据海底观测台报道，美国西北部胡安·德·富卡洋中脊扩张中心的轴向火山发生了一次重大喷发。火山爆发后不久收集的相关熔岩样本有可能极大地提高我们对海底火山过程的理解。这项研究利用了这个独特的机会，对Po210进行了分析，Po210是一种非常短的放射性同位素，它允许高分辨率的年代测定，可以确定熔岩喷发的时间。进一步的铀系同位素分析还可以估算岩浆上升速率，更好地帮助我们了解喷发过程和轴向喷发机制。这些数据，以及独立收集的主要和微量元素地球化学数据和地球物理数据，将结合起来回答有关轴向岩浆系统和岩浆迁移路径导致喷发的问题。这项工作的更广泛影响包括公开发布数据，支持早期职业研究人员，通过社交媒体进行公众宣传，以及支持EPSCoR州的机构。

Our knowledge of the inner workings of volcanoes, magma ascent rates, and the sequence of events leading up to a volcanic eruption is still rudimentary for undersea volcanoes. In the Spring of 2015, just after installation of Ocean Observatory Initiative (OOI), a new; NSF-funded; cabled undersea observatory, a major eruptive event happened at Axial Volcano, an edifice just off the coast of the Northwestern US on the Juan de Fuca mid-ocean ridge spreading center. Samples of the associated lavas, collected just shortly after the eruption hold the potential to dramatically improve our understanding of undersea volcanic processes. This research takes advantage of this unique opportunity to carry out analyses of Po210, a very short lived radioactive isotope, which allows high resolution dating that can tell over what period of time the lavas were erupted. Additional Uranium series isotope analyses allow estimates to also be made about magma ascent rates, better helping us understand the eruption process and mechanisms of the Axial eruption. These data, along with independently collected major and trace element geochemical data and geophysical data that will be combined to answer questions about the Axial magmatic system and magma migration pathways leading to eruption. Broader impacts of the work include public release of data, support of an early career researcher, public outreach via social media, and support of an institution in an EPSCoR state.