Sediment and Ocean History of the N.E. Pacific During the Pleistocene: A Pilot Study

东北部的沉积物和海洋历史

• 批准号: 8712036
• 负责人: Robert Karlin
• 金额: $ 9万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-15 至 1990-03-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8712036&HistoricalAwards=false
• 关键词: Sediment; Ocean; History; N.E.; Pacific

The purposes of this research (a one-year pilot program) are to examine the sediment and isotope geochemistry and paleomagnetism of cores from the N.E. Pacific Ocean and to establish a framework for later sedimentological, micropaleontological, and geochemical studies of the paleoceanography and sediment history in conjunction with the JOIDES RESOLUTION operations in the region in 1990-1991. Our immediate goal is to establish a regional isotope and carbonate stratigraphy using existing cores and material to be collected on a Canadian cruise to the Gulf of Alaska in August, 1978. However, the geochemical information obtained in this study will also provide important information on outstanding questions concerning the history of the N.E. Pacific. Specifically, we will 1) examine the temporal and spatial behavior of the carbonate compensation depth (CCD) during the Quaternary; 2) establish whether North Pacific Bottom Water (NPBW) was formed during glacial times; 3) evaluate the history and extent of marine and backarc volcanism; and 4) examine the effects of climatic change on the provenance, supply, and dispersal pathways of continentally-derived material. If, indeed, the North Pacific has been a locus of deep water formation, then its history becomes of major importance in understanding global climatic change. The REU supplement will enable a University of Washington undergraduate to participate in this work and gain valuable experience in both observational and analytical aspects of marine geology. Under the guidance of the PI, the student will participate in core opening, description, and sampling for sedimentology, geochemistry, paleo/rock magnetism, and isotope analysis. He will assist in routine paleomagnetic measurements and learn to apply quantitative analytical techniques to geochemical and paleomagnetic data. He will also work with the PI in the interpretation and synthesis of the results with available geophysical data to understand temporal and areal patterns of sedimentation.

这项研究（为期一年的试点计划）的目的是检查东北部岩心的沉积物和同位素地球化学以及古地磁学。太平洋，并结合 1990-1991 年该地区的 JOIDES RESOLUTION 行动，为后来的古海洋学和沉积物历史的沉积学、微古生物学和地球化学研究建立一个框架。 我们的近期目标是利用 1978 年 8 月在加拿大阿拉斯加湾航行中收集的现有岩心和材料建立区域同位素和碳酸盐地层。然而，本研究中获得的地球化学信息也将为有关东北部历史的悬而未决的问题提供重要信息。太平洋。 具体来说，我们将1）研究第四纪碳酸盐补偿深度（CCD）的时空行为； 2）确定北太平洋底水（NPBW）是否在冰川时期形成； 3）评估海洋和弧后火山活动的历史和范围； 4) 研究气候变化对大陆来源物质的来源、供应和扩散途径的影响。 如果北太平洋确实是深水形成的所在地，那么它的历史对于理解全球气候变化就变得非常重要。 REU 补充品将使华盛顿大学的本科生能够参与这项工作，并获得海洋地质学观测和分析方面的宝贵经验。 在 PI 的指导下，学生将参与沉积学、地球化学、古/岩石磁性和同位素分析的岩心打开、描述和采样。 他将协助常规古地磁测量，并学习将定量分析技术应用于地球化学和古地磁数据。 他还将与 PI 合作，利用现有的地球物理数据解释和综合结果，以了解沉积的时间和区域模式。