40 Ar/39 Ar Laser-Probe Grain Provenance Study of the Stratigraphic Record of Paleogene Tectonics, Pacific North- western U.S.

美国西北太平洋古近纪构造地层记录的 40 Ar/39 Ar 激光探针谷物物源研究

• 批准号: 8917053
• 负责人: Paul Renne
• 金额: $ 7.83万
• 依托单位: Institute of Human Origins
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-02-01 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8917053&HistoricalAwards=false
• 关键词: 40; Ar; 39; Laser; Probe

The 40Ar/39Ar Laser Probe is an increasingly accessible tool that has great promise for studying the stratigraphic record of tectonic events. This project will attempt to resolve several tectonic issues concerning the provenance of Eocene basins in northern California and Oregon by dating individual detrital grains of biotite, while mica, and hornblende by 40Ar/39Ar Laser Probe techniques. These include the uplift history of the source terrains, whether or not the klamath Mountains was uplifted during the Eocene and whether tectonic rotation was a major factor during the Eocene. The results of the study will also provide a test and practical demonstration of this provenance technique.

40Ar/39Ar 激光探头是一种越来越容易使用的工具，对于研究构造事件的地层记录具有巨大的前景。 该项目将尝试通过 40Ar/39Ar 激光探测技术对黑云母、云母和角闪石的单个碎屑颗粒进行测年，从而解决有关加利福尼亚州北部和俄勒冈州始新世盆地起源的几个构造问题。 其中包括源地的隆起历史、克拉马斯山脉是否在始新世期间隆起以及构造旋转是否是始新世期间的主要因素。 The results of the study will also provide a test and practical demonstration of this provenance technique.