The Last Pulse – dating the youngest deformation in the Alps with ESR thermochronometry

在这个项目中，我们使用石英电子自旋共振（ESR）对阿尔卑斯山脉的四条主要断层（Simplon、Brenner、Salzachtal和Giudicaria断层）进行了超低温热时测定，以估计它们的第四纪活动。样品将直接取自断层岩心，也可以间接取自断层，这使我们能够检查断层岩心上是否有最近的热套印。间接ESR年龄，连同新的磷灰石和锆石(U-Th)/He和现有的裂变径迹年龄，将用于模拟下壁的发掘。这将极大地填补目前地球物理结果与（百万年前）地质数据集之间的时间尺度差距，这些数据集已经在4D-MB SPP中产生。我们的研究区域涵盖了阿尔卑斯山的中西部、东部和南部，因此我们将能够阐明造山带的不同部分如何响应俯冲极性反转。

In this project, we perform ultralow temperature thermochronometry using quartz electron spin resonance (ESR) dating on four major faults in the Alps (the Simplon, Brenner, Salzachtal, and Giudicaria Faults) to estimate their Quaternary activity. Samples will be taken directly from fault core rocks, as well as indirectly across the fault, which allow us to examine whether there is recent thermal overprint on the fault core. Indirect ESR ages, together with new apatite and zircon (U-Th)/He and existing fission track ages, will be used to model the exhumation of the footwalls through time. This will contribute significantly to fill the timescale gap between the present geophysical results and (million years ago) geological datasets, which have been produced in the 4D-MB SPP. Our study area covers the central-west, east, and southern parts the Alps and we will therefore be able to elucidate how the different parts of the orogen responded to the subduction polarity reversal.