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ODP893站提供了自约150ka以来分辨率最高的气候和古气候记录之一，但出于安全考虑，IODP不能延长这一记录。然而，圣巴巴拉盆地在构造上是活跃的，可以追溯到至少~450ka或更长时间的沉积物剖面暴露在海底或海底附近，在那里它可以进行活塞取心。根据这项合同，PIS将把美国地质勘探局收集的新的多通道地震数据与现有的高分辨率单通道、多通道工业、岩心和油井数据的精确导航网格以及多波束测深相结合，以确定3D的详细地层，并精确定位有利的取心地点。这项研究是一项试验性计划，目的是进行一些取芯，以测试它们的构造重建，并确定是否真的可以获得良好的取芯，以检验这样一个假设，即自约450ka以来，记录良好的千禧年尺度全球气候行为一直是气候历史的组成部分。

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.