A Test for Extending the High-Resolution Climate History Back to ~450ka: The Interface Between Climate, Tectonics, and Sea-level Change in Santa Barbara Basin

位于圣巴巴拉盆地的ODP 893站点提供了~150 ka以来分辨率最高的气候和古气候档案之一，但由于安全问题，IODP无法延长这一记录。然而，圣巴巴拉盆地构造活跃，至少可追溯至~450 ka或更早的沉积物剖面暴露在海底或附近，可在此处进行活塞取芯。根据该合同，PI将整合美国地质勘探局收集的新的多道地震数据，与现有的高分辨率单道、多道工业、岩心和油井数据的精确导航网格，沿着多波束测深，以确定详细的三维地层，并精确定位有利的取芯地点。这项研究是一个试点计划，做一些取芯测试他们的构造重建，并确定是否确实可以获得良好的核心，以测试的假设，即有充分记录的千年尺度的全球气候行为典型的过去60 ka一直作为气候历史的一个组成部分，因为~450 ka。

ODP Site 893 in Santa Barbara Basin provides one of the highest-resolution climatic and paleo-climatic archives since ~150 ka, yet IODP cannot extend this record owing to safety concerns. However, Santa Barbara Basin is tectonically active, and the sediment section dating back to at least ~450 ka or more is exposed at or near the seafloor where it is accessible to piston coring. Under this award, the PIs will integrate new multichannel seismic data collected by the USGS, with the existing precisely-navigated grids of high-resolution single-channel, multichannel industry, core and well data, along with multibeam bathymetry to determine the detailed stratigraphy in 3D, and precisely locate favorable sites for coring. This study is a pilot program to do some coring to test their tectonic reconstructions and to determine whether good cores can indeed be obtained to test the hypothesis that the well-documented millennial-scale global climate behavior typical of the last 60 ka has been operating as an integral part of climate history since ~450 ka.