BREAK@ESRF

Deformation in the Earth’s crust localizes onto faults that may rupture rapidly producing earthquakes, or undergo slow aseismic slip that may or may not accelerate into coseismic slip. Our goal is to provide the first quantitative laboratory observations of the full displacement field in rocks before and during coseismic fault slip. Here, we will 1) develop a new and original rock deformation apparatus (ZEUS) on beamline BM18, that will couple X-ray tomography imaging and acoustic emission monitoring, 2) perform shock wave experiments on rocks on beamline ID19, 3) develop techniques to measure residual strains in deformed rocks on beamline ID11. The principal investigator, François Renard, has obtained an European Research Council Advanced Grant for the period 2022-2026, with a total funding of 3.45 M€, and in which ESRF is a Beneficiary. We are requesting a total of 165 shifts over 3 years (102 shifts on beamline BM18, 27 shifts on beamline ID19, 36 shifts on beamline ID11).

地壳中的变形会集中于断层之上，这些断层既可能快速破裂引发地震，也可能发生缓慢的无震滑移（aseismic slip），且该滑移可能加速也可能不加速为同震滑移（coseismic slip）。我们的目标是首次提供同震断层滑移前后岩石中完整位移场的定量实验室观测结果。在此，我们将开展三项工作：1）在BM18光束线（beamline BM18）上搭建一套全新原创的岩石变形装置（ZEUS），该装置将集成X射线断层扫描（X-ray tomography）成像与声发射（acoustic emission）监测功能；2）在ID19光束线（beamline ID19）上开展岩石冲击波（shock wave）实验；3）在ID11光束线（beamline ID11）上研发用于测量变形岩石残余应变（residual strains）的技术。项目首席研究员弗朗索瓦·勒纳尔（François Renard）已获得欧洲研究委员会（European Research Council）2022-2026年度的高级研究基金，总资助金额为345万欧元，欧洲同步辐射光源（ESRF）为该项目的受益方。我们申请在3年内累计使用165次机时，其中BM18光束线102次、ID19光束线27次、ID11光束线36次。