The Transport of Terrestrial Matter to the Pacific Equatorial Undercurrent: A Rare Earth Element River Signature from the Weathering of New Guinea Islands

陆地物质向太平洋赤道暗流的输送：新几内亚群岛风化的稀土元素河流特征

• 批准号: 0081007
• 负责人: Edward Sholkovitz
• 金额: $ 6万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0081007&HistoricalAwards=false
• 关键词: Transport; Terrestrial; Matter; Pacific; Equatorial

ABSTRACTOCE-0081007 Previous research by the PI showed that waters from the Sepik River on the northern coast of Papua New Guinea (PNG) had dissolved rare earth element (REE) compositions which are quite distinct from seawater. When normalized against the REE composition of Coral Sea Composite, the river had enriched Sm, Eu and Gd concentrations. This signature remained well developed in the estuary despite dilution of river water by seawater. For this reason, the PI will analyze water samples collected from the Sepik River estuary to Manus Island along the track of the Pacific Equatorial Undercurrent (PEU) for REEs. The primary objective for this research is to show that the REE signature and other lithogenic elements, especially Fe, in the PEU results from the transport of terrestrial material via island weathering and river inputs into undercurrents.

PI先前的研究表明，巴布亚新几内亚（PNG）北方海岸的塞皮克河（Sepik River）的沃茨中溶解有与海水截然不同的稀土元素（REE）成分。 当标准化对珊瑚海复合物的稀土元素组成，河流富集Sm，Eu和Gd的浓度。 尽管河水被海水稀释，但这一特征在河口仍然很发达。 因此，PI将分析沿太平洋赤道潜流（PEU）轨迹从塞皮克河口到马努斯岛沿着采集的水样中的稀土元素。 这项研究的主要目的是表明，稀土元素的签名和其他成岩元素，特别是铁，在PEU的陆地材料通过岛屿风化和河流输入到暗流的运输结果。