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.

这项研究的目的（为期一年的试点计划）是检查N.E.核心的沉积物和同位素地球化学和古磁性。太平洋并建立了一个框架，以与1990 - 1991年在该地区的加入分辨率运营结合使用后来的沉积学，微生石学和地球化学研究。 我们的近期目标是使用现有的核心和材料建立区域同位素和碳酸盐地层，并于1978年8月在加拿大巡游到阿拉斯加湾。有关N.E.历史的问题太平洋。 具体而言，我们将1）检查第四纪期间碳酸盐补偿深度（CCD）的时间和空间行为； 2）确定在冰川时期是否形成了北太平洋底部水（NPBW）； 3）评估海洋和后火山的历史和范围； 4）检查气候变化对大陆材料的出处，供应和分散途径的影响。 如果确实，北太平洋一直是深水形成的源头，那么它的历史将在理解全球气候变化方面至关重要。 REU补充剂将使华盛顿大学的本科生能够参加这项工作，并在海洋地质的观察和分析方面获得宝贵的经验。 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核心开放，描述和抽样。 他将协助常规的古磁测量，并学会将定量分析技术应用于地球化学和古磁数据。 他还将与PI一起在结果的解释和合成中与可用的地球物理数据合成，以了解沉积的时间和面积模式。