Collaborative Research: Establishing Quaternary Climate/Terrestrial/Oceanic Linkages in southern Alaska and IODP Site Survey

题目：合作研究：建立阿拉斯加南部第四纪气候-冰川-海洋联系的高分辨率时间记录（IODP现场调查）PI/机构：John Jaeger，佛罗里达；北伊利诺伊大学罗斯·鲍威尔；科罗拉多大学博尔德分校的约瑟夫·斯托纳；Sean Gulick，德克萨斯大学地球物理研究所；艾伦·考恩，阿巴拉契亚州立大学；摘要：作为拟议的IODP项目现场调查的一部分，研究人员将在阿拉斯加南部边缘钻探与晚新生代气候变化和构造活动相关的海洋沉积物，并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额外的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，但影响比青藏高原小。该取芯方案旨在提供次年代际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物源的一些变异性。研究人员将使用回收的岩心材料来限制沉积时间、沉积物混合速率、沉积物通量和沉积物来源，以推断冰川动力学，并表征基本的视觉和物理特性。通过与俄勒冈州立大学的同事合作，他们将获得有关古温度、盐度和氧气条件的额外信息。研究人员还将处理海洋地震数据，用于层序地层对比和拟议的IODP钻探地点的基线特征。

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.