Collaborative Research: Initial Sedimentological Characterization of the Late Cretaceous-Early Cenozoic Drill Cores from Cape Roberts, Antarctica

合作研究：南极洲罗伯茨角晚白垩世-早新生代钻芯的初步沉积学特征

• 批准号: 9527481
• 负责人: Ross Powell
• 金额: $ 13.76万
• 依托单位: Northern Illinois University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9527481&HistoricalAwards=false
• 关键词: Collaborative; Research; Initial; Sedimentological; Characterization

Krissek OPP 9527008 Powell OPP 9527481 Abstract An international initiative to collect 1500 m of drill core from offshore of Cape Roberts, McMurdo Sound Antarctica, is intended to provide a better understanding of Antarctic history through the late Cretaceous and early Cenozoic. Events during this period, which extends from before the final breakup of Gondwana through the onset of Antarctic glaciation, are ill-defined by existing data. The Cape Roberts Project (CRP) aims to provide new data about the development of the West Antarctic rift system, the subsidence history of the Ross Sea, and ice sheet fluctuations on Antarctica through this critical time interval. These regional events must be documented better because they have ramifications of regional and global significance, including: 1) impacts on both regional and global climatic development, with its terrestrial and marine effects, and 2) impacts on the preservation of such climatic records through the regional and global influences of Gondwana tectonics. CRP is partly an extension of previous drilling efforts on the Antarctic continental margin, and is partly a new initiative to more completely document the developmental history of the Ross Sea sector of the Antarctic and southern Pacific region through the late Cretaceous - early Cenozoic. It will draw on the successes of previous drilling efforts to document regional and environmental development with good spatial and temporal resolution, and it will also draw upon newly compiled geophysical data bases. CRP is a collaborative endeavor and is currently being supported by six participating countries. This award supports the U.S. contribution to the stratigraphic logging and initial sedimentological characterization of the drill core. Pursuit of more specific research goals will be accomplished via proposals from individual scientists in the future. Tasks involved in the proposed work will include initial description and characterizatio n of the stratigraphic successions; these results will be used as the fundamental data base for other analyses. The stratigraphic sections will also be used as reference sections for modeling observed marine and geophysical events. Initial sedimentological characterization of the successions will allow the definition of facies, the construction of facies sequences, and the interpretation of depositional environments through time. The end result of the proposed work will be an Ocean Drilling Program-style initial report for each drilling season. These reports will include the stratigraphic log, initial facies and depositional system interpretations, sedimentary petrologic and petrogenetic analyses, and initial clay mineralogical analysis. Information provided by other specialists will also be included in the reports, including biostratigraphy, magnetostratigraphy, geophysical logs and geochemical interpretations. The initial interpretations of regional history will be presented in these reports, and the regional and global ramifications of this history will be highlighted.

Krissek Opp 9527008 Powell Opp 9527481摘要一项国际倡议，旨在从McMurdo Sound Antalctica收集1500 m的钻头核心，旨在通过晚白垩纪和早期的乔生来更好地了解南极历史。 在此期间，从冈瓦纳（Gondwana）通过南极冰川发作的最终分解之前延伸的事件被现有数据不明显。 罗伯特角（Cape Roberts）项目（CRP）旨在通过此关键时间间隔提供有关西南极裂谷系统的发展，罗斯海的沉降历史以及南极的冰盖波动的新数据。 这些区域事件必须得到更好的记录，因为它们对区域和全球意义的影响很大，包括：1）对区域和全球气候发展的影响，其陆地和海洋效应以及2）对通过Gondwana Tectonics的区域和全球影响来保护此类气候记录的影响。 CRP部分是对南极大陆边缘的先前钻井工作的一部分，部分是一项新的计划，旨在通过晚期的白垩纪 - 早期的新生代，更彻底地记录南极和南太平洋地区罗斯海部门的发展历史。 它将借鉴以前的钻井工作的成功，以良好的空间和时间分辨率记录区域和环境开发，并且还将利用新汇编的地球物理数据基础。 CRP是一项合作的努力，目前正在六个参与国家的支持。 该奖项支持美国对地层记录的贡献和钻芯的初始沉积学特征。 追求更具体的研究目标将通过未来的个人科学家的建议来实现。 拟议工作涉及的任务将包括地层继承的初始描述和特征；这些结果将用作其他分析的基本数据库。 地层切片还将用作建模观察到的海洋和地球物理事件的参考部分。 继承的最初沉积学表征将允许相应的定义，相序列的构造以及随着时间的推移解释沉积环境。 拟议工作的最终结果将是每个钻井季节的海洋钻井程序风格的初始报告。 这些报告将包括地层对数，初始相和沉积系统解释，沉积性岩石学和岩发生分析以及最初的粘土矿物学分析。 其他专家提供的信息也将包括在报告中，包括生物地层学，磁层学，地球物理原木和地球化学解释。 这些报告将对区域历史进行最初的解释，并将强调该历史的区域和全球影响。