Collaborative Research: Ar Geochronometry of Fault Rocks Associated with Ancient Earthquakes

合作研究：与古地震有关的断层岩的 Ar 地球测时

• 批准号: 9805137
• 负责人: Chris Hall
• 金额: $ 5.69万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 2001-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9805137&HistoricalAwards=false
• 关键词: Collaborative; Research; Ar; Geochronometry; Fault

9805137 Hall Dating movement on specific faults is a pervasively important datum in many geologic investigations, however such information most commonly be obtained indirectly. This problem is particularly difficult in the brittle field as a few isotopic-based systems are active. This proposal tackles dating of brittle faults that produce a transient, fault-generated friction melt. The idea is to determine a methodology to obtain an 40Ar/39Ar age from pseudotachylite that avoids many of the potential errors (inclusion of un-melted source material, inequilbrium in melt and recoil loss effects during analysis, among others). If successful, such a protocol would have broad utility in projects requiring knowledge of the timing of brittle fault movements.

9805137大厅 断层定年运动是许多地质调查中普遍存在的重要资料，但这些资料大多是间接获取的。 这个问题在脆性领域中特别困难，因为少数基于同位素的系统是活跃的。 这项建议解决了脆性断层，产生一个短暂的，故障产生的摩擦熔体的约会。 这个想法是确定一种方法，以获得一个40 Ar/39 Ar年龄的假玄武玻璃，避免了许多潜在的错误（包括未熔化的源材料，不平等的熔体和反冲损失的影响，在分析过程中，除其他外）。 如果成功，这样的协议将有广泛的实用性，在项目中需要的知识脆性断层运动的时间。