A Newly Discovered Hawaiian Volcano on Kaena Ridge

卡纳岭新发现的夏威夷火山

• 批准号: 1031485
• 负责人: John Sinton
• 金额: $ 10.75万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1031485&HistoricalAwards=false
• 关键词: Newly; Discovered; Hawaiian; Volcano; Kaena

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.

最近绘制的海底图沿着，并对奥帕提亚岛附近的海底火山岩进行了重力和地球化学分析，结果表明，海底凯纳海岭沿着可能有一座火山。 如果得到证实，新发现的火山岩将提供有关夏威夷岩浆活动及其时间演化的基本新信息。 它还将有助于解释构成夏威夷岛链的重叠火山结构的地球物理数据。该项目追求这一新的发现，通过学生/教师运行的海洋学巡航返回该地区，使用远程操作的车辆收集更多的重力数据，并从海底的关键位置现场采样火山岩。将对返回实验室的样品进行主要和微量元素以及关键放射性同位素（Nd，Sr，Pb）分析。 将使用K-Ar和Ar-Ar方法测定样品的年代。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有力整合。 在这个项目中，学生们参与了从项目规划到参加海洋学考察、开展地球化学工作、在国家会议上发言等各个层面的工作。