Collaborative Research: Establishing a High-resolution Temporal Record of Quaternary Climate-Glacial-Ocean Linkages in Southern Alaska (and IODP Site Survey)

标题：合作研究：建立南阿拉斯加第四纪气候-冰川-海洋联系的高分辨率时间记录(IODP现场调查)PI/机构：佛罗里达州John Jaeger；北伊利诺伊大学Ross Powell；科罗拉多大学博尔德分校Joseph Stner；德克萨斯大学地球物理研究所Sean Gulick；阿巴拉契亚州立大学Ellen Cowan；阿拉斯加大学费尔班克斯分校的布鲁斯·芬尼摘要：作为拟议的IODP计划的现场调查的一部分，该计划旨在钻探与阿拉斯加南部边缘晚新生代气候变化和构造活动相关的海洋沉积物，研究人员将与已经资助的活塞取心和浅层成像巡航相结合，并将在拟议的阿拉斯加湾钻探地点获得更多活塞岩心和高分辨率地震图像。就气候变化和构造之间可能的反馈而言，该地区被认为与青藏高原相似，但影响较小。取心方案旨在提供亚十年至千年时间尺度的时间分辨率和足够的空间分辨率，以捕捉来自冰川源区的海洋沉积物来源的某些变异性。研究人员将使用回收的岩芯材料来限制沉积的时间、沉积物混合速度、沉积物通量和沉积物来源，推断冰川动力学，并表征基本的视觉和物理特性。在与俄勒冈州立大学同事的合作下，他们将获得有关古温度、盐度和氧气条件的更多信息。研究人员还将处理海洋地震数据，以用于层序地层对比和拟议IODP钻探地点的基线描述。

Title: Collaborative Research: Establishing a High-resolution Temporal Record of Quaternary Climate-Glacial-Ocean Linkages in Southern Alaska (an IODP Site Survey)PI/Institution: John Jaeger, Florida; Ross Powell, Northern Illinois University; Joseph Stoner, University of Colorado at Boulder; Sean Gulick, University of Texas Institute of Geophysics; Ellen Cowan, Appalachian State University; Bruce Finney, University of Alaska-FairbanksAbstract:As part of a site survey for a proposed IODP program to drill marine sediments associated with late Cenozoic climate change and tectonic activity along the southern Alaskan margin, the researchers will combine efforts with an already funded piston coring and shallow imaging cruise and will acquire additional piston cores and high-resolution seismic images at proposed Gulf of Alaska drill sites. This region is believed to be analogous to, but have a smaller influence than, the Tibetan plateau in terms of the possible feedback between climate change and tectonics. The coring program has been designed to provide temporal resolution at sub-decadal to millennial time scales and sufficient spatial resolution to capture some of the variability in the provenance of marine sediments derived from glaciated source areas. The researchers will use the recovered core material to constrain the timing of deposition, sediment mixing rates, sediment fluxes, and sediment sources, to infer glacial dynamics, and to characterize basic visual and physical properties. In collaboration with Oregon State University colleagues, they will obtain additional information about paleotemperature, salinity, and oxygen conditions. The researchers will also process the marine seismic data for use in sequence stratigraphic correlations and baseline characterization of the proposed IODP drill sites.