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

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。

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.