Paleoceanographic and Climatic Evolution of Southern High Latitude Oceans Based on Deep-Sea Sedimentary Sequences

该奖项支持对古海洋学， 古气候、地层和地理演化 南极海洋，使用一套高品质，深钻 沉积层序 这项调查将利用，在一个 综合方式，氧碳同位素，定量 浮游有孔虫分析，沉积物成分，包括 冰筏碎屑和微量金属分析 生物地层 和锶同位素数据也在生成， 与磁性地层学相结合， 年代地层格架 最近，非常成功的，海洋钻探探险， 南极和亚南极地区现在提供了重要的， 新的沉积序列，可用于进一步快速 对南大洋演化的认识。 的 特别重要的是南极钙质的可用性 古近纪的生物序列， available. 大部分研究将集中在最新的 白垩纪至古近纪层序。 这项研究的主要目标，在其最广泛的意义上，是 为了更好地了解南极海洋的进化 最后一个白垩纪以来的环境和影响， 这一地区的变化对全球古海洋和气候的影响 历史 这些调查预计将增加许多知识 南极古气候和海洋的演变 晚中生代 由于地处偏远，这片地区至今仍 是世界上最不为人所知的纬度带之一， 在全球环境的演变中发挥了关键作用。

This award supports an investigation of the paleoceanographic, paleoclimatic, stratigraphic and biogeographic evolution of the Antarctic Ocean, using a suite of high-quality, deep-drilled sedimentary sequences. This investigation will utilize, in an integrated fashion, oxygen and carbon isotopes, quantitative planktonic foraminiferal analysis, sediment composition including ice-rafted detritus and trace metal analysis. Biostratigraphic and strontium isotopic data are also being generated for integration with magnetostratigraphy to develop the necessary chronostratigraphic framework. The recent, highly successful, ocean drilling expeditions to Antarctic and Subantarctic regions have now provided important, new sedimentary sequences that can be employed for further rapid advancement in the understanding of Southern Ocean evolution. Of particular importance is the availability of Antarctic calcareous biogenic sequences of Paleogene age that have never before been available. Much of this research will concentrate on the latest Cretaceous through Paleogene sequence. The primary objective of this research, in its broadest sense, is to better understand the evolution of the Antarctic marine environment since the latest Cretaceous and the impact that major changes in this region had on global paleoceanographic and climate history. These investigations are expected to add much knowledge about the evolution of Antarctic paleoclimates and oceans through the late Phanerozoic. Being so remote, this area still remains among the least known of the world's latitudinal belts, yet has played a key role in the evolution of the global environment.