Cruise to Detroit Seamount, NW Pacific, for Sediment Coring and ODP Site Survey

前往西北太平洋底特律海山进行沉积物取芯和 ODP 现场勘察

• 批准号: 8710783
• 负责人: Lloyd Keigwin
• 金额: $ 12.79万
• 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: 1988
• 资助国家: 美国
• 起止时间: 1988-04-15 至 1990-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8710783&HistoricalAwards=false
• 关键词: Cruise; Detroit; Seamount; NW; Pacific

Most paleoceanographic studies of the geochemistry of benthic foraminifera have concentrated on the North Atlantic because of the abundance of fossil remains in sediments of this region and because of the importance of the region as a source for deep water in the oceans. Micropaleontologic and geochemical studies in this area indicate major deep circulation changes during glacial/interglacial cycles. In contrast, little is known about circulation in the northern Pacific since the microfossil record of these changes is poorly preserved in the deep water sediments of the region. Recent results from shallow sediments, however, suggest that the North Pacific may have been a source of intermediate or deep water during glacial conditions. The present award will support a field and laboratory program to collect and analyze sediments from the northernmost Emperor seamount chain. The objective of the field program is to collect a depth transect of cores from the region of Detroit Seamount and use geochemical and paleontologic techniques to establish the paleohydrography of the north Pacific. Laboratory analyses will include carbon-14 and Cd/Ca ratios. Cores will be collected on a separately funded cruise of the R.V. Washington. The results of this project will be important in formulating plans for deep ocean drilling in the North Pacific.

大多数古海洋学研究的地球化学， 底栖有孔虫集中在北大西洋 因为这片区域的沉积物中有丰富的化石 由于该地区作为一个重要的来源， 在海洋深处。微体古生物和地球化学 这一区域的研究表明， 在冰期和间冰期的循环中。相比之下， 关于北方太平洋的环流 这些变化的记录在深水中保存得很差 该地区的沉积物。最近的结果从浅沉积物， 然而，这表明北太平洋可能是 在冰川条件下的中层或深层水。 本奖项将支持一个领域和实验室 收集和分析最北端沉积物的计划 皇帝海山链。实地方案的目标是 从底特律地区收集一个深度样带 利用地球化学和古生物学技术， 建立北太平洋的古水文地理学。实验室 分析将包括碳-14和镉/钙比率。核心将是 在华盛顿号的独立资助的巡航中收集的。 这一项目的结果将对制定 北太平洋深海钻探计划