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

本研究的目的（为期一年的试点计划） 是检查沉积物和同位素地球化学， 东北太平洋和 为以后的沉积学， 微体古生物学和地球化学研究 古海洋学和沉积历史， 1990年至1991年该区域的JOIDES RESOLUTION业务。 我们 近期目标是建立一个区域同位素和碳酸盐 利用现有岩心和材料进行地层学研究， 1978年8月，加拿大人乘船前往阿拉斯加湾。 然而，在这项研究中获得的地球化学信息将 还提供关于未决问题的重要信息 关于东北太平洋的历史 具体来说，我们将1）检查时间和空间 碳酸盐岩补偿深度（CCD）在 第四纪; 2）确定北太平洋底层水是否 （3）评价了北太平洋水的形成历史 以及海洋和弧后火山活动的范围;以及4）检查 气候变化对原产地、供应和 大陆来源物质的扩散途径。 如果， 事实上，北太平洋一直是深水区 形成，那么它的历史就变得非常重要， 了解全球气候变化。 REU补充将使华盛顿大学 本科生参与这项工作，并获得宝贵的 海洋观测和分析方面的经验 地质学。 在PI的指导下，学生将 参与岩心开孔、描述和取样， 沉积学、地球化学、古/岩石磁学和同位素 分析. 他将协助常规的古地磁测量 并学习应用定量分析技术， 地球化学和古地磁数据。 他还将与 PI在解释和综合结果时， 可用的地球物理数据，以了解时间和区域 沉积模式。

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.