RREADI3- TCS Eruption dating readiness and decadal magmatic timing studies for the EPR ISS

RREADI3- EPR ISS 的 TCS 喷发测年准备和十年岩浆计时研究

• 批准号: 0937409
• 负责人: Kenna Rubin
• 金额: $ 7.56万
• 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: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0937409&HistoricalAwards=false
• 关键词: RREADI3; TCS; Eruption; dating; readiness

Lavas covering about 2/3 of Earth's surface are erupted at submarine mid-ocean ridges, making it the most volcanically productive environment on the planet. This volcanism provides a major outlet for heat and matter in Earth's interior and plays a significant role in ocean chemistry and the ecology of deep sea marine life. This project is focused on the timescales and rates of very recent magmatic and volcanic processes at mid-ocean ridges, with a focus on interdisciplinary integrated study sites of the Ridge2000 program and other sites of opportunity where seafloor eruptions can be detected and quickly sampled. Radio isotopes 210Po and 210Pb are used and comprise the most important and reliable means to date young eruptions. The half-life of 210Po is only 138 days, as such, samples for 210Po-210Pb analysis require immediate processing. The broader impacts of the work are enhancing infrastructure for science by upgrading laboratory facilities to accommodate more dates, making methodological improvements in the dating technique, and keeping the lab ready to conduct short-fuse lava dating for current and future time critical studies of submarine volcanism.

覆盖地球表面约三分之二的熔岩在海底洋中脊喷发，使其成为地球上火山最丰富的环境。这种火山活动为地球内部的热量和物质提供了一个主要的出口，在海洋化学和深海海洋生物的生态学中起着重要作用。该项目的重点是海洋中脊最近岩浆和火山过程的时间尺度和速率，重点是山脊2000计划的跨学科综合研究地点和其他可以检测并快速采样海底火山爆发的地点。使用了放射性同位素210Po和210Pb，它们是确定年轻喷发日期的最重要和最可靠的手段。210Po的半衰期只有138天，因此，210Po- 210pb分析的样品需要立即处理。这项工作的更广泛影响是通过升级实验室设施以适应更多的日期，改进测年技术的方法，并使实验室准备好进行短熔丝熔岩测年，以进行当前和未来海底火山作用的时间关键研究，从而加强科学基础设施。