Development of a Standard Biostratigraphic Reference Section for the Silurian Cape Phillips Formation, Canadian Arctic

加拿大北极地区志留纪菲利普斯角地层标准生物地层参考剖面的开发

• 批准号: 0107139
• 负责人: Paula Noble
• 金额: $ 10万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0107139&HistoricalAwards=false
• 关键词: Development; Standard; Biostratigraphic; Reference; Section

ABSTRACT:Development of a Standard Biostratigraphic Reference Section for the Silurian Cape Phillips Formation, Canadian ArcticPaula J. NobleEAR-0107139This study proposes to advance the status of Silurian radiolarian biostratigraphy through the collection and analysis of radiolarians from well-dated pristine sections of basinal marine strata in the Cape Phillips Formation, Canadian Arctic. Radiolarian data will be integrated with other useful biostratigraphic and geochemical datums with the goals of 1) generating a composite biostratigraphic standard for the Cape Phillips Basin, and 2) calibrating radiolarian datums that appear to have global biostratigraphic significance. This study should produce the most comprehensive and best calibrated data set ever generated for Silurian radiolarians and will be of fundamental importance in providing better age control for complexly deformed and poorly dated basinal sequences in orogenic belts around the world. Radiolarians and graptolites will be collected from at least three sections of Wenlockian - Ludlovian Strata on Devon and Cornwallis Islands and combined with six other Llandoverian-Ludlovian sections sampled by the PI and her collaborator, Dr. A. C. Lenz, during past field seasons. The graptolites are well studied and serve as the basis for biostratigraphic correlation and age control. A 1999 pilot study of carbon isotope geochemistry shows that there are at least two positive excursions that may serve as chemostratigraphic datums that may be integrated with the paleontologic data. Isotope geochemistry will be conducted on additional sections to further determine the reliability and extent of these chemostratigraphic datums.

摘要：加拿大北极地区志留纪Cape菲利普斯组标准生物地层参考剖面的建立Paula J. Nobleyoung-0107139本研究旨在通过对加拿大北极地区Cape菲利普斯组海盆海相地层中年代较早的原始剖面中的放射虫进行收集和分析，提高志留纪放射虫生物地层学的地位。放射虫数据将与其他有用的生物地层学和地球化学数据相结合，目标是：1）为菲利普斯角盆地制定一个综合生物地层学标准，2）校准似乎具有全球生物地层学意义的放射虫数据。这项研究应产生最全面和最好的校准数据集以往任何时候都产生的志留纪放射虫，并将在提供更好的年龄控制复杂变形和不良的盆地序列在世界各地的造山带的根本重要性。放射虫和笔石将从德文郡和康沃利斯群岛的至少三个温洛克-卢德洛夫地层剖面中采集，并与PI及其合作者A. C.伦茨，在过去的赛季。笔石是生物地层对比和时代控制的基础。 1999年的碳同位素地球化学试点研究表明，至少有两个积极的偏移，可以作为化学地层基准，可以与古生物数据相结合。将对其他剖面进行同位素地球化学分析，以进一步确定这些化学地层基准的可靠性和范围。