Magnetostratigraphy and Chronostratigraphic Facies Evolution, Little Bahama Bank

磁性地层学和年代地层相演化，小巴哈马浅滩

• 批准号: 8817060
• 负责人: Robert Ginsburg
• 金额: $ 7.49万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-02-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817060&HistoricalAwards=false
• 关键词: Magnetostratigraphy; Chronostratigraphic; Facies; Evolution; Little

Shallow-water carbonate platforms contain a rich-record of changing environments related to globally synchronous external controls including sea level and changes in circulation. However, we have until now been unable to link the timing of these controlling events with actual platform rock sequences due to early diagenetic changes. Furthermore, the correlation and influence of platform-derived sediment with the proximal deep- water areas was also not possible. Many of these limitations for efficiently extracting information from the platforms have now been obviated by the successful application of magnetostratigraphic dating to the shallow-water carbonates. This research will develop a chronostratigraphic facies evolution of a carbonate platform, will assess the influence of eustatic sea level changes and will correlate with surrounding deep-water environments. Once completed, the results will enable a refined chronostratigraphic platform-periplatform model, linking the entire depositional system.

浅水碳酸盐岩台地包含丰富的环境变化记录，这些环境变化与全球同步的外部控制有关，包括海平面和环流变化。然而，由于早期成岩作用的变化，到目前为止，我们还无法将这些控制事件的时间与实际的台地岩石层序联系起来。此外，台源沉积物与近端深水区的相关性和影响也是不可能的。由于成功地将磁地层测年技术应用于浅水碳酸盐地层，这些限制有效地从钻井平台中提取信息的因素已经被消除了。这项研究将发展一个碳酸盐岩台地的年代地层相演化，将评估海平面上升变化的影响，并将与周围的深水环境相关联。一旦完成，研究结果将建立一个精细的年代地层平台-台地周围模型，将整个沉积体系联系起来。