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

合作研究：与古地震有关的断层岩石的 Ar 地球测时

• 批准号: 9805138
• 负责人: Jerry Magloughlin
• 金额: $ 7.41万
• 依托单位: Colorado State University
• 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=9805138&HistoricalAwards=false
• 关键词: Collaborative; Research; Ar; Geochronometry; Faults

9805138 Magloughlin 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.

9805138特定断层上的马格洛林测年运动在许多地质调查中是一项无处不在的重要资料，但这些信息大多是间接获得的。这个问题在脆性领域尤其困难，因为有几个基于同位素的系统是活跃的。这一建议解决了脆性断层的测年问题，这些断层产生了瞬间的断层产生的摩擦熔化。我们的想法是确定一种从假玄武岩中获得40Ar/39Ar年龄的方法，以避免许多潜在的误差(包括未熔化的来源材料、熔体中的不平衡和分析过程中的反冲损失影响等)。如果成功，这样的协议将在需要了解脆性断层运动时间的项目中具有广泛的实用价值。