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

职务名称：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; Ross Powell，北方伊利诺伊大学; Joseph Stoner，科罗拉多大学博尔德分校; Sean Gulick，德克萨斯大学地球物理研究所; Ellen科万，阿巴拉契亚州立大学;布鲁斯芬尼，阿拉斯加-费尔班克斯大学摘要：作为拟议的IODP项目现场调查的一部分，该项目旨在钻探与阿拉斯加南部边缘沿着晚新生代气候变化和构造活动有关的海洋沉积物，研究人员将把联合收割机的工作与已经得到资助的活塞式取芯和浅层成像巡航相结合，并将获得更多的活塞式取芯和高分辨率地震图像在拟议的阿拉斯加湾钻井现场。 该地区被认为是类似的，但有较小的影响，比青藏高原在气候变化和构造之间的可能反馈。 取芯计划的目的是提供时间分辨率在十年以下千年的时间尺度和足够的空间分辨率，以捕捉一些变化的海洋沉积物的来源来自冰川源区。 研究人员将使用回收的核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，推断冰川动力学，并表征基本的视觉和物理特性。 在与俄勒冈州州立大学同事的合作中，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，用于拟议的IODP钻井地点的层序地层对比和基线特征。

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.