Central Scotia Seafloor and the Drake Passage Deep Ocean Current Gateway

斯科舍省中部海底和德雷克海峡深洋流门户

• 批准号: 0636850
• 负责人: Ian Dalziel
• 金额: $ 51.18万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-15 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0636850&HistoricalAwards=false
• 关键词: Central; Scotia; Seafloor; Drake; Passage

This project studies the opening of the Drake Passage between South America and Antarctica through a combined marine geophysical survey and geochemical study of dredged ocean floor basalts. Dating the passage's opening is key to understanding the formation of the circum-Antarctic current, which plays a major role in worldwide ocean circulation, and whose formation is connected with growth of the Antarctic ice sheet. Dredge samples will undergo various geochemical studies to determine their age and constrain mantle flow beneath the region. Broader impacts include support for graduate education, as well as undergraduate and K12 teacher involvement in a research cruise. The project also involves international collaboration with the UK and is part of IPY Project #77: Plates&Gates, which aims to reconstruct the geologic history of polar ocean basins and gateways for computer simulations of climate change. See http://www.ipy.org/index.php?/ipy/detail/plates_gates/ for more information.

该项目通过海洋地球物理调查和疏浚海底玄武岩的地球化学研究相结合，研究南美洲和南极洲之间德雷克海峡的开口。确定该通道开口的年代是了解环南极流形成的关键，环南极流在全球海洋环流中发挥着重要作用，其形成与南极冰盖的增长有关。挖泥样品将接受各种地球化学研究，以确定其年龄并限制该区域下方的地幔流动。更广泛的影响包括支持研究生教育，以及本科生和 K12 教师参与研究巡游。该项目还涉及与英国的国际合作，是IPY项目#77：Plates&Gates的一部分，该项目旨在重建极地海洋盆地的地质历史和气候变化计算机模拟的门户。请参阅 http://www.ipy.org/index.php?/ipy/detail/plates_gates/ 了解更多信息。