Collaborative Research: Resolution of the Stratigraphic Record for a High Input, Collision-Margin Shelf Basin: The MARGINS Waipaoa Focus Area

这项研究的主要目的是确定在怀保阿近海陆架盆地中发现的全新世中晚期海洋地层记录的性质和分辨率，涉及土地利用和海洋/气候变化。支持者认为，陆架盆地泥沙沉积将被证明有助于记录邻近陆地环境的有充分记录的变化，包括2250年来湖泊记录中重大洪水事件的显著记录，以及受ENSO、火山作用、构造和欧洲砍伐森林驱动的中全新世和沉积物输入的历史扰动。为了提取这些信息，PIS将对怀保阿陆架泥矿进行高分辨率(Chirp)反射和侧扫测量，同时进行有针对性的振动取心工作，以确定该矿藏的全新世地层记录。表层沉积物将与BOX和KASTEN岩心一起收集，以比较历史沉积物扩散模式与主导更长时间(全新世)的沉积物扩散模式。

The major objective of this study is to determine the nature and resolution of the Mid-Late Holocene marine stratigraphic record found in the shelf basin off the Waipaoa with respect to land use and oceanographic/climate changes. The proponents suggest that the shelf basin mud deposit will prove useful in recording well-documented changes in the adjacent terrestrial environment, including a remarkable 2250-year record of major flood events from lake records, as well as Mid-Holocene and Historical perturbations in sediment input, driven by ENSO, volcanism, tectonics and European deforestation. To extract this information, the PIs will conduct high-resolution (Chirp) reflection and sidescan surveys of the Waipaoa shelf mud deposit, along with targeted vibra-coring efforts to determine the Holocene stratigraphic record of the deposit. Surface sediment will be collected with box and kasten cores to compare historical sediment dispersal patterns with those that dominate over longer (Holocene) timescales.