Occurence of marine palynomorphs of sediment core CRP-1 (Table 1)@en

The first core of the Cape Roberts Project, CRP-1, penetrated a Quaternary and lower Miocene section rather than the anticipated Palaeogene sediments. Initial palynologic study was conducted at the Crary Science and Engineering Laboratory, McMurdo Station, concurrent with drilling. Rapid and environmentally safe sample processing was made possible by the use of a focused microwave digestion unit that scrubbed acid fumes. In situ and/or reworked dinocysts (dinoflagellate cysts), acritarchs (leiospheres and acanthomorphs), and prasinophyte phycomata are present in the 35 samples studied. Overall, the CRP-1 assemblages are similar to Arctic marine palynomorph assemblages that are used there as ice margin indicators. Some of the acanthomorph acritarchs recovered from the CRP-1 core closely resemble cysts of extant Antarctic autotrophic sea-ice dinoflagellates. It is possible that some of these acanthomorphs are actually dinocysts, and could be used as indicators of sea-ice conditions similar to today. […]开普罗伯茨项目（Cape Roberts Project, CRP）的首枚岩芯CRP-1，钻获了第四纪至中新世下部地层序列，而非此前预期的古近纪沉积物。该项研究的初始孢粉学分析于钻探作业同期在麦克默多站克莱尔科学与工程实验室（Crary Science and Engineering Laboratory）开展。借助一台可净化酸雾的聚焦微波消解装置，实现了样品的快速且环境友好的处理流程。本次研究的35份样品中，均检出原位及/或经再沉积改造的沟鞭藻囊孢（dinoflagellate cysts）、疑源类（acritarchs）以及扁藻纲孢囊（prasinophyte phycomata）。整体而言，CRP-1岩芯的孢型组合与北极地区用作冰缘指示标志的海洋孢型组合具有相似性。从CRP-1岩芯中获取的部分刺饰疑源类（acanthomorph acritarchs），与现存南极自养型海冰沟鞭藻的囊孢形态高度相似。推测其中部分刺饰类群实为沟鞭藻囊孢，可作为与现今相似的海冰环境的指示标志。……