A Newly Discovered Hawaiian Volcano on Kaena Ridge

最近对海底的测绘以及对瓦胡岛海底火山岩的重力和地球化学分析表明，沿着海底的卡埃纳山脊可能有一座火山。如果得到证实，新发现的大厦将提供有关夏威夷岩浆活动及其演化的基本新信息。它还将有助于解释构成夏威夷岛链的重叠火山大厦的地球物理数据。为了实现这一新发现，该项目由学生/教师组织的海洋游轮返回该地区，使用远程操作的车辆收集更多重力数据，并从海底关键位置采集火山岩样本。将对返回实验室的样品进行主要元素和微量元素以及主要放射性同位素（Nd, Sr, Pb）的分析。样品将使用K-Ar和Ar-Ar方法测定年代。这项工作的更广泛影响包括与法国科学家的国际合作以及对学生的研究和教育的强有力整合。在这个项目中，学生们从项目策划到参加海洋巡航，再到开展地球化学工作，再到在国家会议上做报告，参与了各个层面的工作。

Recent mapping of the seafloor along with gravity and geochemical analyses of seafloor volcanic rocks off the Island of Oahu suggests that there may be a volcano along the submarine Kaena Ridge. If validated, the newly discovery edifice would provide fundamental new information about Hawaiian magmatic activity and its evolution in time. It will also help in the interpretation of geophysical data of the overlapping volcanic edifices that make up the Hawaiian Island chain. The project pursues this new discovery by returning to the area with a student/faculty-run oceanographic cruise that uses a remotely operated vehicle to collect more gravity data and spot-sample volcanic rocks from critical locations on the seafloor. Samples returned to the lab will be analyzed for major and trace elements and key radiogenic isotopes (Nd, Sr, Pb). Samples will be dated using K-Ar and Ar-Ar methods. Broader impacts of the work include international collaboration with French scientists and strong integration of research and education for students. In this project, students are engaged at all levels from project planning to participating in an oceanographic cruise, to carrying out the geochemical work, to making presentations at national meetings.