Measurement of Rates of Tectonometamorphic Processes Using Rb-Sr Isotopic Compositions of Garnet Porphyroblasts and Their Matrices

利用石榴石成斑细胞及其基质的 Rb-Sr 同位素组成测量构造变质过程的速率

• 批准号: 9118691
• 负责人: Donald DePaolo
• 金额: $ 8.18万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-02-15 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118691&HistoricalAwards=false
• 关键词: Measurement; Rates; Tectonometamorphic; Processes; Using

This study builds on new developments in the analysis of very small amounts of Rb/Sr isotopes in garnets. The new technique will be applied to two field areas where substantial geological and petrological information is available, in order to determine high- precision pressure-temperature-time paths for the rocks. The study constitutes the first field-tests for this technique and is essential for verification of its applicability to tectonic problems. The results will have profound implications for tectonic and metamorphic rate calculations from a wide variety of tectonic environments.

这项研究建立在分析非常 少量的Rb/Sr同位素。 新技术将 适用于两个油田地区， 岩石学信息是可用的，以确定高- 岩石的精确压力-温度-时间路径 研究 构成了这项技术的第一个现场测试， 必须验证其适用性的构造 问题 这一结果将对地球的构造 和变质率计算从各种构造 环境.