A Seafloor Geodesy Experiment at the Discovery Transform Fault

摘要非地震断层滑动是板块构造中最重要的过程之一。海洋变换有利于理解无地震断层滑动，因为大约90%的板块运动是无地震的，只有大约10%是由地震引起的。该项目将在发现转换断层上部署声波测距系统，为期一年，与海底地震仪的部署同时进行。这种仪器、发现号的快速滑动速率，以及发现号断层上的地震和无震滑动的混合，将对地震和抗震失效的断层部分产生约束。有关断层地震和非地震区的推断将与被动和主动震源地震成像结果相结合，这些成像结果将把转换的行为与关于玄武岩、辉长岩、蛇纹岩和橄榄岩的变形性质的岩石力学知识联系起来。

McGuireAbstract Aseismic fault slip is one of the most important processes in plate tectonics. Oceanic transforms are advantageous for understanding aseismic fault slip because about 90% of the plate motion is aseismic and only about 10% results in earthquakes. This project will deploy as acoustic ranging system across the Discovery transform fault for one year that will be contemporaneous with a deployment of ocean bottom seismometers. The combination of this instrumentation, Discovery's fast slip rate, and the mixture of seismic and aseismic slip on the Discovery fault will yield constraints on the portions of the fault that fail seismically and aseismically. Inferences about the seismic and aseismic regions of the fault will be combined with both passive and active source seismic imaging results that will relate the behavior of the transform to rock mechanics knowledge about the deformation properties of basalt, gabbro, serpentine, and peridotite.